Prof.
Jo Van den Brand
(Nikhef)
10/09/2018, 09:40
Prof.
Jianwei Qiu
(Jefferson Lab)
10/09/2018, 10:20
Spin Physics in Nuclear Reactions and Nuclei
Plenary Sessions (for INVITED PLENARY TALKS only!)
Spin is an intrinsic and quantum property of all particles that we know of, including the elementary particles of the standard model, as well as composite particles, such as nucleons and nuclei that make up essentially all the visible matter in the universe. Without the spin, our world would not be the same as what we have seen and lived in. In this talk, I will briefly review the spin...
Prof.
Donald G. Crabb
(University of Virginia)
10/09/2018, 11:30
Polarized Ion and Lepton Sources and Targets
Plenary Sessions (for INVITED PLENARY TALKS only!)
I will discuss the role of polarized solid targets in particle physics from their inception in 1962 to the present day. I will present the developments, such as cryogenic improvements and better materials, that have contributed to our better understanding of the physical processes involved in particle scattering. Examples of current efforts will be given.
Dr
Frank Rathmann
(Forschungszentrum Jülich)
10/09/2018, 12:10
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Plenary Sessions (for INVITED PLENARY TALKS only!)
The Standard Model (SM) of Particle Physics is not capable to account for the apparent matter-antimatter asymmetry of our Universe. Physics beyond the SM is required and is either probed by employing highest energies (e.g., at LHC), or by striving for ultimate precision and sensitivity (e.g., in the search for electric dipole moments). Permanent electric dipole moments (EDMs) of particles...
Prof.
Maxim Polyakov
(Ruhr-Universität Bochum)
10/09/2018, 14:30
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
The physics related to the form factors of the energy momentum tensor spans a wide spectrum of problems, and includes gravitational physics, hard exclusive reactions, hadronic decays of heavy quarkonia, and the physics of exotic hadrons described as hadroquarkonia. It also provides access to the "last global unknown property:" the D-term. We review the physics associated with the form factors...
Ciprian Gal
(University of Virginia)
10/09/2018, 14:30
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
In the 40 years since the landmark E122 experiment, parity violating electron scattering (PVES) has proven to be a versatile and precise tool in both setting limits on beyond the standard model physics and in determining properties of nuclear matter. Its appeal stems from the use of the cleanly interpretable weak neutral current. Updated experimental techniques will allow a new generation of...
Dr
Igor Korover
(NRCN)
10/09/2018, 14:30
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The nuclear force that binds nucleons together is predominantly scalar, i.e., spin and isospin independent. This force includes tensor, spin-isospin and other components, but these parts are much weaker than the main scalar part. Since the scalar force is attractive at typical distances between nucleons in nuclei and becomes repulsive at shorter distances, it must vanish in between, and there...
Dr
Kurt Aulenbacher
(Institut für Kernphysik der Johannes Gutenberg-Universität Mainz)
10/09/2018, 14:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Several extensions are being realized for the new MESA accelerator at Mainz university in comparison to the already existing injection system at MAMI. The new device is operating at 100keV beam energy and is called the Mesa Low-energy Beam Apparatus (MELBA). A new polarized source of the inverted type with increased extraction gradient has been build which is able to provide good beam quality...
Dr
Gerhard Reicherz
(Ruhr University Bochum, Germany)
10/09/2018, 14:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The COMPASS collaboration performed a polarized Drell-Yan program to measure TMD (Transverse Momentum Dependent) and PDFs (Parton Distribution Functions) in 2015. To improve the statistics the program is continued for this year 2018. In the Drell-Yan program a negative pion beam of 190 GeV/c with an intensity of 108 /s is scattered on a transversely polarized proton target with a length of...
Mr
Reynier Cruz Torres
(MIT)
10/09/2018, 14:50
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
Due to their complexity, atomic nuclei are traditionaly studied using effective theories. While these tend to describe the low-momentum part of the nucleon momentum distribution well, they fail to describe two-nucleon short-range correlations (SRC). The latter account for approximately 20% of nucleons in the nucleus and dominate the many-body wave function at short distances. The Contact...
Mr
Andrea Ferrero
(CEA-Saclay/IRFU/DPhN)
10/09/2018, 15:05
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Together, GPDs and TMDs provide the most complete description of the
partonic structure of the nucleon, and their study represents the major
goal of the COMPASS-II program.
GPDs are experimentally accessible via lepton-induced exclusive reactions, in
particular DVCS and DVMP. At COMPASS, these processes are investigated
using a 160 GeV high intensity muon beam impinging on a 2.5~m long...
Erhard Steffens
(Physics Dept., FAU Erlangen-Nürnberg)
10/09/2018, 15:10
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Since 2017, the LHCSpin study group (Ferara, Frascati, Jülich, Petersburg, Erlangen) is investigating the addition of a HERMES-type PGT in front of the LHCb detector in order to perform Fixed Target Single-Spin Azimuthal Asymmetry (SSAA) measurements. In cooperation with LHC experts, the conditions for applying a PGT are being studied. A cold openable storage cell is considered. A key role for...
Dr
Xing Rong
(University of Science and Technology of China)
10/09/2018, 15:10
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Searching for new particles beyond the standard model is crucial for understanding several fundamental conundrums in physics and astrophysics. Several hypothetical particles can mediate exotic spin-dependent interactions between ordinary fermions, which enable laboratory searches via the detection of the interactions. We present a novel platform for investigating exotic spin-dependent...
Dr
Vladimir Ladygin
(VBLHEP JINR)
10/09/2018, 15:10
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The results on the angular dependencies of the vector Ay and tensor Ayy and Axx analyzing powers in deuteron-proton elastic scattering at large scattering angles are presented. These data were obtained at internal target at JINR Nuclotron in the energy range 400-1800 MeV using polarized deuteron beam from new polarized ion source [1].
New data on the deuteron analyzing powers in in the...
Jan Matousek
(University and INFN Trieste, Italy)
10/09/2018, 15:20
In 2015 at the COMPASS experiment at CERN a pion beam with momentum of 190 GeV/c interacted with a transversely polarised NH_3 target. Muon pairs produced in the Drell–Yan process were detected. In addition to the extraction of the transverse spin asymmetries (TSAs) from this data, a complementary analysis of the TSAs weighted by powers of the dimuon momentum q_T has been done and will be...
Prof.
Elena Long
(University of New Hampshire)
10/09/2018, 15:30
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
Whenever technological advancements provide access to a new degree of freedom, previously inaccessible quantities can be measured. Currently, we are seeing the beginning of a renaissance of experiments utilizing a tensor polarized target to probe the structure of the deuteron. This is due to two recent developments: the JLab 12 GeV upgrade, and a high-luminosity, high-tensor-polarized target....
Dr
Ralf Engels
(Institut für Kernphysik, Forschungszentrum Jülich)
10/09/2018, 15:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
An atomic beam source (ABS) is producing a nuclear- and electron-polarized beam of hydrogen or deuterium atoms that can be used to feed a polarized storage-cell gas target. In a dedicated apparatus these atoms recombine on the surfaces inside the storage cells to molecules. Depending on the chosen surface material, the nuclear polarization of the atoms is at least partially preserved in the...
Mr
Shengying ZHAO
(Institut de Physique Nucléaire Orsay)
10/09/2018, 15:40
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Study of the structure and dynamics of the nucleon has been recently deeply renewed with the advent of an universal parameterization of the partonic structure of the nucleon in terms of the Generalized Parton Distributions (GPDs). Encoding the correlations between the elementary constituents of the nucleon, GPDs allows a 3-dimensional imaging of the nucleon from the dynamical link between the...
Prof.
Carl Gagliardi
(Texas A&M University)
10/09/2018, 15:45
The STAR Collaboration at RHIC is exploring the partonic origin of the proton spin with a broad range of measurements in polarized pp collisions. STAR measurements of the transverse single-spin asymmetry, $A_N$, for $W$ boson production provide the first experimental investigation of the non-universality of the Sivers function. Precise follow-up measurements of $A_N$ for direct photon...
Dr
Anatoli Zelenski
(BNL)
10/09/2018, 15:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The RHIC Optically-pumped Polarized H- Ion Source (OPPIS) upgrade with the atomic beam hydrogen injector and the He-ionizer cell was commissioned for operation in the Run-2013. The use of the high brightness primary proton source resulted in higher polarized beam intensity and polarization delivered for injection to Linac-Booster-AGS-RHIC accelerator complex in RHIC Runs 2013-2017. The...
Sebastian Baunack
(JGU Mainz)
10/09/2018, 15:50
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
The P2 collaboration prepares a precise determination of the weak mixing angle at low energy at the upcoming MESA accelerator in Mainz. The projected relativce accuracy is 0.15% which is comparable to the existing measurements at the Z-pole. This accuracy will allow for a test of the Standard Model up to a mass scale of 50 TeV.
The experimental method, the measurement of the parity...
Ms
meriem benali
(LPC Caen)
10/09/2018, 16:40
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Generalized Parton Distribution (GPDs) are considered as a suitable tools to study the structure of the hadron in term of quarks and gluons. Deeply virtual Compton Scattering (DVCS) is the simplest process that can be described in term of GPDs by measuring its cross section. DVCS on the neutron (nDVCS) is sensitive to the GPD "E", the least constrained GPD, which allows access to the quark...
Mr
James Brock
(Jefferson Lab)
10/09/2018, 16:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Construction of a new, dynamically polarized target for the recently commissioned CLAS12 detector package at Jefferson Lab presents new challenges. The target, currently under construction by a collaboration comprised of Christopher Newport University, Old Dominion University, the University of Virginia, and the Jefferson Lab Target Group, will feature samples of solid, irradiated ammonia...
Prof.
Klaus Kirch
(ETHZ & PSI)
10/09/2018, 16:40
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Searches for finite permanent electric dipole moments (EDM) of fundamental systems with spin are among the most sensitive experimental tests of parity and time reversal symmetry. Invoking the CPT theorem, they also test the CP symmetry between matter and antimatter. Values of EDM from various fundamental particles and systems offer complementary information concerning the potential sources of...
Prof.
Israel Mardor
(Tel Aviv University, Tel Aviv, Israel)
10/09/2018, 16:40
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
I will report on recent polarization transfer experiments carried out at the Mainz Microtron (MAMI), via the quasi-elastic A(e ⃗,e^' p ⃗ ) reaction, over a wide range of missing momentum and virtuality. We measured the ratio (Px/Pz)A of the transverse to longitudinal components of polarization transferred from an electron to a bound proton in 2H and 12C [1, 2] , and transverse (Px and Py) and...
156.
Measurement of Vector and Tensor Asymmetries in Quasielastic Electron Scattering from Deuterium
Prof.
Richard Milner
(MIT)
10/09/2018, 17:00
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The measurement of the beam-vector and tensor asymmetries in quasielastic electrodisintegration
of the deuteron at the MIT-Bates Linear Accelerator Center up to missing momentum of 500 MeV/c. Data were collected simultaneously over a momentum transfer range 0.1 < Q2 < 0.5 (GeV/c)2 with the Bates Large Acceptance Spectrometer Toroid using an internal deuterium gas target, polarized...
Dr
James Maxwell
(Dr.)
10/09/2018, 17:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Solid polarized targets rely on Nuclear Magnetic Resonance techniques to provide measurements of the enhanced polarization provided under Dynamic Nuclear Polarization. Upcoming polarized target experiments in Jefferson Lab's Hall B present challenging conditions which would benefit from improvements to traditional NMR techniques. For decades, JLab has relied upon Liverpool QMeters for NMR...
Prof.
Nikos Sparveris
(Temple University)
10/09/2018, 17:15
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
The Generalized Polarizabilities (GPs) are fundamental quantities of the nucleon and as such they are extremely valuable for a complete understanding of the nucleon structure. The GPs can be accessed experimentally through measurements of the Virtual Compton Scattering reaction. They can be seen as Fourier transforms of local polarization densities (electric, magnetic, and spin) and are a...
Joshua Pierce
(Oak Ridge National Laboratory)
10/09/2018, 17:20
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Neutron Macromolecular Crystallography is a powerful technique for the determination of the structure of proteins. The sensitivity of the neutron scattering cross section to the presence of hydrogen gives this technique a unique advantage compared to the more widely used X-ray crystallography. The problem with neutron crystallography is the low flux of even the most advanced neutron sources...
Dr
Sergey Dymov
(INFN)
10/09/2018, 17:20
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The hadron reactions with the production of a diproton final state, which is a proton pair $\{pp\}_s$
with small excitation energy, have been studied extensively at ANKE-COSY.
These included the break-up process $pd\to \{pp\}_sn$ at high and low momentum transfer,
the $pN\to\{pp\}_s\pi$ one pion production, the $pp\to\{pp\}_s\gamma$ reaction and study of
the ABC effect in the...
Prof.
Susan Gardner
(University of Kentucky)
10/09/2018, 17:20
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
The ability to manipulate or measure a particle's spin played a
key role in the rise of the Standard Model (SM), and it continues to be
crucial to the elucidation of physics that the SM cannot explain.
Hints, e.g., to the origin of dark matter, of the cosmic surfeit of baryons,
or of the weak scale could conceivably come from experiments that exploit
spin degrees of freedom. I...
78.
Nuclear Dependence of Transverse Single-Spin Asymmetries in Polarized $p$+$A$ Collisions at RHIC
Dr
Stephen Pate
(New Mexico State University)
10/09/2018, 17:30
Large transverse single-spin asymmetries (TSSA) in hadron production at forward rapidity have been observed in polarized $p$+$p$ interactions for many decades, over a large range of center-of-mass energies, and have led to the investigation of spin-momentum correlations such as the Sivers and Collins effects. In the last few years, it has been discovered at RHIC that these single-spin...
Prof.
Yury Uzikov
(Joint Institute for Nuclear Researches)
10/09/2018, 17:40
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
Intrinsic electric dipole momenta (EDM) of particles and atoms if they do exist will indicate directly to time-reversal invariance violation (and CP violation under CPT symmetry) as well as P-parity violation. Knowledge of these signals is important to understand origin of matter-antimatter asymmetry of the Universe. An EDM of charged particles can be observed by measuring the rate of spin...
Dr
Evgeni Tsentalovich
(MIT)
10/09/2018, 17:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The high intensity polarized electron gun at MIT-Bates was designed as an injector for the linac-ring version of ERHIC.. The design implements a separate preparation chamber, load lock, large area cathode, ring-shaped beam and active cathode cooling. Very good vacuum conditions have been achieved in both the gun chamber and the preparation chamber. Reliable cathode transfer between the load...
Mr
Minho Kim
(Korea University/ RIKEN)
10/09/2018, 17:55
Non-zero transverse single spin asymmetry, AN, of forward pi0 production in the pseudo rapidity range of 3<eta<4 has been measured by various experiments so far and usually interpreted by hard process mechanism between polarized and unpolarized proton collisions. However, no clue can be found yet if there is a potential contribution from the soft process and recently larger AN was also...
Mr
Lukas Huxold
(HHU Duesseldorf)
10/09/2018, 18:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Usually, Lambshift polarimeters are used to measure the nuclear spin polarisation of hydrogen atomic beams or slow proton beams of about 1keV. As recent experiments aim to produce polarised hydrogen molecules (H2 HD, D2), either by recombining atoms (IKP @FZ-Jülich) or with a new molecular-beam-source (BINP), a nuclear spin polarimeter for molecules is needed. As it will be shown in this talk...
Dr
Beatrice Franke
(TRIUMF)
10/09/2018, 18:00
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
A permanent electric dipole moment (EDM) of the neutron would violate parity and time reversal symmetry. Assuming CPT to be a good symmetry of nature, this implies a CP symmetry violation as well. Thus, observing or further limiting the existence of the neutron EDM beyond the current best measurement sensitivity of 3x10^-26 ecm would increase our understanding of the Baryon Asymmetry of the...
Prof.
Tomotsugu Wakasa
(Kyushu University)
11/09/2018, 09:00
Spin Physics in Nuclear Reactions and Nuclei
Plenary Sessions (for INVITED PLENARY TALKS only!)
One of the primary goals of nuclear physics is to describe nuclei and their dynamics in terms of interactions between nuclear constituents.
In addition, high-precision experimental data and sophisticated theoretical calculations are very important for other research fields such astrophysics and neutrino physics.
In this talk, three topics will be discussed by comparing experimental data...
Prof.
Alexander Kovalenko
(Joint Institute for Nuclear Research)
11/09/2018, 10:20
The NICA (Nuclotron-based Ion Collider fAcility) is the new international research facility under the constructing at the Joint Institute for Nuclear Research (JINR, Dubna). The main targets of the facility are: study of hot and dense baryonic matter over the energy range of the maximum baryonic density; investigation of nucleon spin structure and polarization phenomena; and the development of...
Dr
Greg Smith
(Jefferson Lab)
11/09/2018, 11:30
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Plenary Sessions (for INVITED PLENARY TALKS only!)
The ep elastic scattering experiment used to extract a parity-violating asymmetry at Q2=0.0248 (GeV/c)2 will be described. The precision obtained on the final result is ±9.3 ppb- the most precise ep asymmetry ever measured. Some of the backgrounds and corrections applied in the experiment will be explained and quantified, and some of the experimental challenges will be described.
Several...
Dr
Arnaud Comment
(University of Cambridge)
11/09/2018, 12:10
Application of Nuclear Polarization Techniques to Other Fields
Plenary Sessions (for INVITED PLENARY TALKS only!)
Hyperpolarization by dynamic nuclear polarization (DNP) can increase magnetic resonance (MR) sensitivity by several orders of magnitude offering the opportunity to perform real-time in vivo MR imaging (MRI) experiments [1,2]. Numerous preclinical applications have demonstrated the enormous potential of hyperpolarized 13C MRI for in vivo metabolic imaging and several research hospitals are...
Mr
Razvan-Daniel Bucoveanu
(Johannes Gutenberg University)
11/09/2018, 14:30
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
The planned P2 experiment at MESA aims to measure the weak mixing angle with high precision at low momentum transfer from parity violating electron-proton scattering. In order to match this precision, higher order corrections to the asymmetry have to be taken into account. In this talk I will present the effects of 2nd order QED corrections to the asymmetry and the shift in Q2 due to these corrections.
Dr
Hartmut Dutz
(Universität Bonn)
11/09/2018, 14:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
In my talk, I will present the actual status of our projects with special focus on the first results of the dynamic polarizability of radiation-doped polypropylene in a dilution refrigerator under frozen spin conditions. Briefly, I will present new ideas and concepts for high field internal magnets for polarized target applications.
Dr
Matthew Dietrich
(Argonne National Laboratory)
11/09/2018, 14:30
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Based on fundamental symmetries, we would naively expect the permanent electric dipole moment (EDM) of atoms to be identically zero. This is because EDMs are symmetric under time reversal, while the spin of the atom is not, and so any particle having spin and an EDM correlated to that spin would violate time reversal symmetry, as well as parity. Due to the CPT theorem, EDMs also violate...
Katherine Woodruff
(New Mexico State University)
11/09/2018, 14:30
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
One of the least constrained contributions to the neutral current (NC) elastic
neutrino-proton cross section is the strange axial form factor, which
represents the strange quark spin contribution to the spin structure of the
proton. This becomes the net strange spin contribution, $\Delta s$, in the
limit when the negative four-momentum transfer squared ($Q^2$) is zero. The
strange...
Barbara Pasquini
(PV)
11/09/2018, 14:30
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
We review the dispersion analysis of deeply virtual Compton scattering and present a dispersive representation of the D-term form factor for hard exclusive reactions. We use unsubtracted $t$-channel dispersion relations, where the $t$-channel unitarity relation is saturated with the contribution of two-pion intermediate states, using the two-pion distributions amplitude for the...
Mr
Marcel Bornstein
(Physikalisches Institut Universität Bonn)
11/09/2018, 14:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The new concept of the ``4$\pi$-Continuous-Mode-Target'' will allow for the first time the simultaneous usage of a large angular acceptance detector with a continuously polarised target. For polarising a target the process of Dynamic Nuclear Polarisation (DNP) is used which requires low temperatures and a high homogeneous magnetic field within the target volume. A thin, superconducting magnet...
Dr
Boxing Gou
(Helmholtz-Institut Mainz)
11/09/2018, 14:50
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
The asymmetry in the scattering of transversely polarized electrons off unpolarized protons or deuterons arises from the imaginary part of the two-photon exchange amplitude. The A4 collaboration at the MAMI accelerator has performed measurements at various beam energies between 300 MeV and 1.5 GeV both at forward and backward angles. We present an overview about published data and unpublished...
Prof.
Franco Bradamante
(INFN, Trieste Section)
11/09/2018, 14:55
Since 2005, measurements of Collins and Sivers asymmetries from the HERMES
and COMPASS experiments have allowed to assess that the transversity and the
Sivers PDF are different from zero and measurable in semi-inclusive DIS on
transversely polarized targets. Most of the data were collected on proton
targets, only few data were collected in the early phase of the COMPASS
experiment on a...
Mr
Frederic Georges
(Institut de Physique Nucleaire d'Orsay)
11/09/2018, 15:05
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Introduced in the mid 90’s, Generalized Parton Distributions (GPDs) are now a key element in the study of the nucleon internal structure. Indeed, GPDs encapsulate both spatial and momentum distributions of partons inside a nucleon. Through the Ji sum rule, they also allow to derive the total orbital angular momentum of quarks, which is a crucial point to unravel the nucleon spin...
Dr
Carlos Ayerbe Gayoso
(The College of William and Mary)
11/09/2018, 15:05
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The Barely Off-Shell Nucleon Structure (BONuS) experiment at CLAS will measure the neutron structure function $F_2$ for $0.1 < x < 0.8$ over a broad $Q^2$ range, from 1 to 14 GeV$^2 /c$, using electron scattering from deuterium with spectator-proton tagging. By selecting the low-momentum recoil protons at large backward angles, final-state interactions as the deuteron breaks up can be...
Dr
Sergey Dymov
(INFN)
11/09/2018, 15:10
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
The analyzing powers in proton-deuteron elastic and
proton-neutron quasi-elastic scattering were measured at small
angles using a polarized proton beam at the COSY storage ring
incident on an unpolarized deuterium target. Data were taken at 796
MeV and five energies from 1600 MeV to 2400 MeV. The analyzing
power in pd elastic scattering was studied by detecting the low
energy recoil...
Prof.
Werner Heil
(University Mainz)
11/09/2018, 15:10
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Precision measurement of the Zeeman splitting in a two-state system is important for magnetometry, as well as the search for physics beyond the Standard Model. The most precise tests of new physics are often realized
in differential experiments that compare the transition frequencies of two co-located clocks, typically radiating on their Zeeman or hyperfine transitions. The advantage of...
Dr
Stefan Runkel
(polarized Target, University of Bonn)
11/09/2018, 15:10
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
In 2017, the polarized target system from Mainz/Dubna and Bonn were combined for data taking in Bonn. After testing the combined system, the experiment with the new polarized frozen-spin target and the upgraded Crystal Barrel detector started in winter 2017. First data with a transversal proton target were already taken.
In the meantime, the polarized target group at Bonn is building a...
Dr
Fernanda Steffens
(DESY - Zeuthen)
11/09/2018, 15:20
Using the quark quasi-distribution approach, we present the first direct calculation of the transversity parton distribution function within the nucleon from lattice QCD. The calculation is performed using simulations with the light quark mass fixed to its physical. We employ non-perturbative renormalization to subtract the linear and log divergences present in the bare matrix elements, and...
Dr
Kiyoshi Tanida
(Japan Atomic Energy Agency)
11/09/2018, 15:30
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
The Belle II experiment is a substantial upgrade of the Belle detector and will operate at the SuperKEKB energy-asymmetric $e^+ e^-$ collider. The accelerator has already successfully completed the first phase of commissioning in 2016 and first electron positron collisions in Belle II were obtained on April 26, 2018. The design luminosity of SuperKEKB is $8 \times 10^{35}$ cm$^{-2}$s$^{-1}$...
Dr
Yury Plis
(JINR, Dubna, Russia)
11/09/2018, 15:30
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The first attempt is made to realize a polarized deuteron source suited for the Van de Graaff accelerator of Czech Technical University in Prague based on the idea of Kaminsky on channeling deuterons through a Nickel single crystal. The setup is described which contains permanent magnets with a transversal magnetic field (zero field transition) to increase the deuteron polarization up to 2/3...
Marco Ripani
(GE)
11/09/2018, 15:40
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
Several experiments at Jefferson Lab have collected a large amount of data on the spin structure of nucleons using a polarized electron beam directed onto various polarized targets (NH3, ND3, and 3He). In these double polarization experiments, either the double spin asymmetries A|| and A⊥ or the polarized cross section differences Δσ|| and Δσ⊥ are measured with unprecedented precision and...
Dr
Bohdan Marianski
(National Centre for Nuclear Studies\ Warsaw, Poland\)
11/09/2018, 15:40
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Spin density matrix elements (SDMEs) have been determined for exclusive $\omega$ meson production on unpolarized protons, in the COMPASS kinematic region of 1.0 (GeV/$c^2$) $< Q^{2} <$ 10.0 (GeV/$c^2$), 5.0 GeV/$c^2$ $< W < $ 17.0 GeV/$c^2$ and 0.01 (GeV/$c^2$) $
Michael Engelhardt
(New Mexico State University)
11/09/2018, 15:45
Quark orbital angular momentum (OAM) in the proton can be calculated
directly if a Wigner function encoding the simultaneous distribution
of quark transverse positions and momenta is given. This distribution
can be accessed via proton matrix elements of a quark bilocal operator
(the separation in which is Fourier conjugate to the quark momentum)
featuring a momentum transfer (which is...
Dr
Dimitris Sofikitis
(IESL-FORTH)
11/09/2018, 15:50
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Lasers can be used to polarize the valance electrons in an atomic or molecular system [1]. However, if this is done rapidly (< 1ns), it can establish a quantum beating mechanism which transfers polarization to the nuclear spin and ultimately provides the means to control nuclear spin with optical fields. The increasing capabilities (photon flux) of modern commercial lasers and the fact that...
Eugene Chudakov
(Jefferson Lab)
11/09/2018, 15:50
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
We will present preliminary results for the J/psi close-to-threshold
photoproduction obtained in the GlueX experiment at Jefferson Lab.
Close-to-threshold photoproduction gamma+p-->J/psi+p probes small-size
gluon configuration in the proton. This reaction may also contain a
contribution from the s-channel production of the LHCb pentaquark
P(4.4)-->J/psi+p at beam energies of about 10 GeV....
Dr
Stefan Zimmer
(University of Heidelberg)
11/09/2018, 15:50
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
In this talk we report on the results of the experimental search for a permanent electric dipole moment of 129Xe (Xe-EDM) performed by the MIXed-collaboration. Our approach is to detect the free spin precession of hyperpolarized 129Xe nuclear spins and search for frequency changes correlated with the direction of an applied electric field. To eliminate frequency changes caused by magnetic...
Mr
George Prokhorov
(JINR), Prof.
Oleg Teryaev
(JINR)
11/09/2018, 16:40
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The relation of polarization in heavy-ion collisions to axial anomaly is systematically explored. The qualitative description of and quantitative
comparison with experimental data is discussed. The comparison to thermodynamocal approach to polarization is performed. The quark and hadronic degrees of freedom and duality between them are discussed. The role od mass effects, dissipation and...
Mr
Qin-Tao Song
(Sokendai/KEK)
11/09/2018, 16:40
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Generalized parton distributions (GPDs) are important 3D structure functions for hadrons, and they are used to solve the proton spin puzzle. The s-t crossed quantities of the GPDs are generalized distribution amplitudes (GDAs),and they can be studied in the two-photon process which is accessible at KEKB. The GDAs describe the amplitude from quark-antiquark to the hadron pair. In 2016, the...
Dr
Andrew Sandorfi
(Jefferson Lab)
11/09/2018, 16:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
Solid frozen-spin hydrogen-deuteride targets, have been used successfully with polarized photon beams for nuclear physics measurements over the past decade, first at Brookhaven Lab, and recently at Jefferson Lab [1-4]. With the completion of the 12 GeV upgrade to the Jefferson Lab accelerator, the focus of polarized HD at JLab has shifted to experiments with electron beams. In particular,...
Cristian Pisano
(CA)
11/09/2018, 16:40
Within the color gauge invariant generalized parton model (CGI-GPM), that includes initial- and final-state interactions in a TMD formalism, we present the complete results, at leading-order, for transverse single-spin asymmetries in the inclusive hadroproduction of pions, direct photons, D mesons and quarkonia.
Dr
Mikhail Gorshteyn
(Mainz University)
11/09/2018, 16:40
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
We propose a novel dispersion relations-based evaluation of the $\gamma W$-box correction to the universal radiative correction $\Delta_R^V$ to the neutron and nuclear $\beta$ decay. This correction is the main source of the theoretical uncertainty in extracting the value of $V_{ud}$ from those decay processes. We relate the needed input into the dispersion integral to the data on neutrino and...
Dr
Yevgeny Stadnik
(Johannes Gutenberg University of Mainz)
11/09/2018, 16:40
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Measurements of electric dipole moments (EDMs) in atoms, molecules and neutrons serve as sensitive probes of new physics. We give a brief overview of atomic EDM theory [1] and discuss several recent applications of EDM-based measurements to search for new particles.
New bosons can mediate anomalous forces between standard-model particles. Using data from existing atomic and molecular EDM...
Isabella Garzia
(FE)
11/09/2018, 17:00
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
Electromagnetic form factors are fundamental observables needed to parametrize the electric and magnetic structure of hadrons and used to probe the strong interaction.
In this contribution we report on the recent measurements of baryon electromagnetic form factors at the BESIII experiment in Beijing.
The BESIII spectrometer is located at the BEPCII collider, a symmetric e+e- collider running...
Marco Statera
(MI)
11/09/2018, 17:00
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
An innovative magnetic solution is being pursued for inserting a transversely polarized target inside the central solenoid of the CLAS12 detector at Jefferson Lab, in order to measure transverse spin effect in SIDIS with the 11 GeV upgrade of CEBAF. A feasibility study of a bulk superconducting magnetic system is underway, to provide a transverse holding field for the target while compensating...
Michal Krelina
(Universidad Técnica Federico Santa María)
11/09/2018, 17:05
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
We investigate the spin-flip component of the Pomeron using the single spin asymmetry, $A_N(t)$, arising from Coulomb-nuclear interference (CNI) in small-angle elastic scattering.
The study of elastic proton-nucleus scattering is important because it suppresses or excludes the contributions from iso-vector Reggeons which are predominantly spin-flip, and might have a significant impact on the...
Dr
Valery Kubarovsky
(Jefferson Lab, USA)
11/09/2018, 17:15
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
A longstanding goal in nuclear and particle physics has been to describe the three dimensional structure of the nucleon in terms of the quarks and gluon fields. In this regard, exclusive electron scattering experiments, in which all final state particles are measured, are important contributors. Examples are electron elastic scattering, deeply virtual Compton scattering (DVCS), and deeply...
Paolo Pedroni
(INFN-Pavia)
11/09/2018, 17:20
Low Energy Spin Physics with Lepton, Photon and Hadron Probes
Parallel Sessions
In this presentation I will discuss the results of a recent
work on the extraction of the scalar dipole dynamic polarizabilities (DDPs) from proton Real Compton Scattering (RCS) data below pion production threshold.
The dynamical polarizabilities are energy dependent functions which parametrize the response of the internal degrees of freedom of the
proton to an external, real-photon field...
dustin keller
(uva)
11/09/2018, 17:20
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The combination of high luminosity and large kinematic coverage makes SeaQuest at Fermilab an optimal facility to measure single spin asymmetries, with high precision, in polarized Drell-Yan scattering. Scattering the unpolarized beam at Fermilab from the UVA/LANL polarized target will allow isolation of the dynamics of sea quarks in the polarized nucleon. This will allow for the first time a...
Prof.
Nikolai Nikolaev
(Landau Institute for Theoretical Physics)
11/09/2018, 17:20
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Understanding high precision spin dynamics in storage rings is one of major concerns for the JEDI collaboration’s EDM experimentation at COSY. We report here recent results on the impact of synchrotron oscillations on spin rotations at large spin coherence time needed for enhancing feeble EDM signal. A particular emphasis will be on salient features of the Spin Echo phenomenon in storage rings...
Dr
Sook Hyun Lee
(Iowa State University)
11/09/2018, 17:30
The J/Psi, a bound state of charm and anti-charm quark with spin 1, decays into lepton pairs with a large branching ratios. Its production in polarized and unpolarized p+p collisions sheds light on different aspects of QCD. At RHIC energies, charmonium production in $p$+$p$ collisions is dominated by gluon-gluon interaction. As a result, measurements of the TSSA in polarized $p$+$p$ collisions...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
11/09/2018, 17:30
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
Spin correlations for the $\Lambda \Lambda$ and
$\Lambda \bar{\Lambda}$ pairs, generated in relativistic
heavy-ion collisions, and related angular correlations at the
joint registration of space-parity nonconserving hadronic decays
of two hyperons are theoretically analyzed.
These correlations give important information about the character
and mechanism of multiple processes, and the...
Dr
Victor Fimushkin
(Joint Institute for Nuclear Research)
11/09/2018, 17:40
Polarized Ion and Lepton Sources and Targets
Parallel Sessions
The high intensity pulsed source of polarized ions (SPI) has been developed at JINR in collaboration with INR RAS for injection of polarized deuterons and protons into the Nuclotron and future collider of heavy and light ions NICA. The SPI is an atomic beam-type polarized ion source with a charge-exchange plasma ionizer and a storage cell in the ionization region. The source was commissioned...
Gunar Schnell
(University of the Basque Country UPV/EHU)
11/09/2018, 17:50
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Results from the study of exclusive ρ0-meson electroproduction by the HERMES experiment, using the 27.6 GeV longitudinally polarized electron/positron beam of HERA and a transversely polarized hydrogen target, are presented. In analysis of the angular dependence of the distribution of the decay pions, 25 parameters are extracted, which determine the real and imaginary parts of the ratios of...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
11/09/2018, 17:55
Spin Physics in Nuclear Reactions and Nuclei
Parallel Sessions
The electromagnetic processes of annihilation of $(e^+ e^-)$ pairs --
which may be generated, in particular, in relativistic nucleus-nucleus and hadron-nucleus collisions -- into heavy flavor lepton pairs are
theoretically studied in the one-photon approximation, using the
technique of helicity amplitudes . For the process $e^+ e^- \rightarrow
\mu^+\mu^-$, it is shown that -- in the...
Dr
Frank Rathmann
(Forschungszentrum Jülich)
11/09/2018, 18:00
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
The JEDI Collaboration (Jülich Electric Dipole Investigations, http://collaborations.fz-juelich.de/ikp/jedi) aims for a measurement of the electric dipole moments (EDMs) of deuterons and protons at the COoler SYnchrotron (COSY). To make this possible, a novel high precision waveguide RF Wien filter was installed in COSY inside a so-called low-beta section, to modulate the spin of deuterons and...
Mr
Anton Kononov
(Ferrara University)
11/09/2018, 18:20
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
The PAX Collaboration is being involved in experiments employing polarized internal targets. In this framework, the team is since years exploring techniques to produce a beam of polarized antiprotons by means of the spin-filtering technique.
Another physics objective of the collaboration, is a test of time reversal invariance by investigating the T-violating null observable Ay,xz that...
Dr
simonetta liuti
(University of Virginia)
12/09/2018, 09:00
3D Structure of the Nucleon: GPDs and Form Factors
Plenary Sessions (for INVITED PLENARY TALKS only!)
With the tantalizing search of the phase space available for supersymmetric particles turning out empty handed, we are on the verge of new profound paradigm changing discoveries where the strong interactions sector is once again taking on a leading role.
I will discuss deeply virtual exclusive processes as probes for the next frontier that will allow us to access dynamically correlated...
Dr
Pasquale Di Nezza
(LNF)
12/09/2018, 09:40
New physics frontiers can be opened by using internal gas targets at the LHC. The various collision systems like pp, pA and PbA at energies varying from √s_NN=72 GeV to √s=115 GeV, and the implicit forward kinematic of the collisions, make accessible a broad programme of measurements, from the large-x frontier for particle and astroparticle physics to spin and heavy-ion physics. A first step...
Prof.
David Hertzog
(University of Washington)
12/09/2018, 10:20
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Plenary Sessions (for INVITED PLENARY TALKS only!)
Conventional wisdom suggests that new particles should exist as part of highly anticipated Standard Model extensions. Further, the discovery tool is expected to be an energy-frontier collider, where new particles are produced directly among the debris of the highest-energy pp collisions. The Higgs discovery affirmed this technique; although it has not signaled new physics (yet), it...
Eliana Gianfelice-Wendt
(Fermilab)
12/09/2018, 11:30
Acceleration, Storage and Polarimetry of Polarized Beams
Plenary Sessions (for INVITED PLENARY TALKS only!)
The possibility of electrons becoming polarized in an uniform field was
predicted in the early 60s by Loskutov, Korovina, Sokolov and Ternov
(Sokolov-Ternov effect of radiative polarization).
The very first observation of beam self-polarization followed in 1968 at
ACO in Orsay and confirmed at Novosibirsk
VEPP-2 in 1970.
However in particular at high energy, e+-- polarization is not...
Gunar Schnell
(University of the Basque Country UPV/EHU)
12/09/2018, 12:10
Three decades ago it became that the simple quark model approach for the proton failed in describing the spin structure — the spin contribution from quarks, as measured by the European Muon Collaboration (EMC), came out small, by far insufficient to explain the proton spin of 1/2. The experiment utilized the polarized muon beam from CERN’s SPS, which is naturally polarized originating from the...
Dr
Ralf Engels
(Institut für Kernphysik, Forschungszentrum Jülich)
12/09/2018, 14:30
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
Since more than 50 years it is known that different spin combinations of the fuel nucleons (t, d, or 3He) modify the differential and the total cross section of the d-t and the 3He-d fusion reactions. Therefore, polarized fuel can be used to increase the reaction rate in a fusion reactor or to focus the neutrons on special wall areas. Both options are useful to increase the energy output and...
Dr
Anatoli Zelenski
(BNL)
12/09/2018, 14:30
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The experience of the absolute H-jet polarimeter operation at RHIC in 2004-2018 Runs at RHIC will be reviewed. The H-jet polarimeter is a windowless internal polarized atomic hydrogen target inserted into the RHIC ring at the intersection point for measurement of the high-energy circulating proton beam polarization via p-p elastic scattering at low momentum transfer in the Coulomb-Nuclear...
Mr
Andrea Moretti
(University of Trieste / INFN)
12/09/2018, 14:30
In 2016 and 2017 the COMPASS Collaboration has measured 160 GeV/c muon scattering on a 2.5 m long liquid Hydrogen target. The main goal of the measurement was to access GPDs via the deeply virtual Compton Scattering (DVCS) process, but in parallel SIDIS data were collected to investigate the azimuthal modulations of the hadron lepto-production cross-section. In this talk we present preliminary...
Prof.
Oleg Teryaev
(JINR)
12/09/2018, 14:30
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
The recently published description of pressure in proton is discussed in the context of crossing invariance between space-like and time-like hard processes. The relevant properties of the respective non-perturbative inputs are considered. The relations with the properties of space-like and time-like gravitational formfactors at very different scales are discussed.
Rik Yoshida
(Jefferson Lab)
12/09/2018, 14:30
I will discuss the opportunities for spin physics to be studied at the future electron-ion collider in the US.
Prof.
Elliot Leader
(Imperial College London)
12/09/2018, 14:30
The paper on "A spin crisis in the parton model" first appeared 28 years ago. Since then numerous publications have attempted to clarify the issue, and to show that there is really no crisis, yet papers which talk about the "proton spin crisis" continue to appear at present.
We give a careful discussion of the subtleties involved and a precise statement of the proton spin sum rule, whereby...
Dr
Haixin Huang
(Brookhaven National Lab)
12/09/2018, 14:50
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
In polarized proton collision experiments, spin flip is needed to reduce the systematic errors. At high energy colliders with Siberian snakes, a single magnet spin flipper does not work . A more sophisticated spin flipper, constructed of nine-dipole magnets, was used to flip the spin in the BNL Relativistic Heavy Ion Collider. A 97% spin-flip efficiency was measured at both 24 and 255 GeV....
Nobuo Sato
(Jefferson Lab)
12/09/2018, 14:50
In this talk I will discuss the recent updates from the JAM collaboration to extract simultaneously polarized and unpolarized PDFs and fragmentation functions from the available global data.
Dr
Christoph Montag
(Brookhaven National Laboratory)
12/09/2018, 14:50
The electron-ion collider eRHIC aims at a luminosity around 10^34 cm^-2 sec^-1. The design is based on the existing Relativistic Heavy Ion Collider (RHIC) facility, which has successfully accelerated, stored and collided polarized proton beams of up to 255 GeV as well as ions up t0 100 GeV/n beam energy. A 5-18 GeV electron storage ring will be added in the RHIC tunnel, thus providing...
Dr
Polina Kravchenko
(PNPI NRC Kurchatov institute)
12/09/2018, 15:05
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
A double-polarized dd-fusion experiment (PolFusion, PNPI, Gatchina) has been proposed to investigate the reactions d + d → 3He + n and d + d → t + p in the energy range of 10-100 keV. The possibility of using a vector and tensor polarized beam and target combination creates the opportunities to measure the asymmetry of the differential cross section and spin-correlation coefficients in the d +...
Dr
Fanglei Lin
(Jefferson Lab)
12/09/2018, 15:10
The Jefferson Lab Electron Ion Collider (JLEIC) is designed to provide high luminosity and high polarization needed to reach new frontiers in the exploration of nuclear structure. The luminosity, exceeding 1033 cm-1s-1 in a broad range of the center-of-mass energy and maximum luminosity above 1034 cm-1s-1, is achieved by high-rate collisions of short small-emittance low-charge bunches made...
Prof.
Peter Fierlinger
(TU München)
12/09/2018, 15:10
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
Since several decades people search for the electric dipole moment (EDM) of the neutron, an unambiguous manifestation of parity (P) and time reversal symmetry (T) violation. Assuming the conservation of CPT, T violation in a fundamental system also means CP violation. This has only been observed in very few systems in the Standard Model of particle physics (SM) as a tiny effect. However, it...
Dr
Nigel Buttimore
(Trinity College Dublin)
12/09/2018, 15:10
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
Seeking the level of polarization of spin-polarized hadrons that have
been accelerated to high energies is a continuing challenge. A
theoretical study of electromagnetic hadronic interference indicates
that scattering of polarized protons and polarized helium-3 ions at
small angles on a suitable target can provide an effective
polarimeter. A more complete understanding of the asymmetry of...
Dr
Fernanda Steffens
(DESY - Zeuthen)
12/09/2018, 15:10
We present spin-dependent parton distribution functions calculated
within lattice QCD simulations using physical values of the light quark
mass. Non-perturbative renormalization is employed, and the lattice data
are converted to the MS-scheme at a scale of 2 GeV. We then reconstruct
the light-cone parton distribution functions using a matching procedure.
We obtain a nice overlap for a...
Dr
Alexey Vladimirov
(Regensburg University)
12/09/2018, 15:20
Evolution of transverse momentum dependent distributions (TMD evolution) is an evolution with respect to two scales: the renormalization and rapidity scales. The double scale evolution grants a freedom in the definition of physical observables, which naively could lead to ambiguous results. We show that the double-evolution picture has a natural interpretation in terms of evolution potential,...
Prof.
Xurong Chen
(Institute of Modern Physics, CAS, China)
12/09/2018, 15:30
In this talk, I will troduce the plan to construct a polarized electron-ion collider in China (EicC) based on the high intensity heavy ion facility (HIAF) which is under construction by the institute of modern physics (IMP). The EicC's accelerator design and main physics goals will be discussed.
Dr
Andrei Poblaguev
(Brookhaven National Laboratory)
12/09/2018, 15:30
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The Polarized Atomic Hydrogen Jet Target polarimeter (HJET) is employed by Relativistic Heavy Ion Collider (RHIC) to measure absolute polarization of the colliding proton beams. In RHIC Runs 2015 (E_beam=100 GeV) and 2017 (E_beam=255 GeV) we accumulated large statistics of about 10^9 events per beam per run for elastic polarized proton scattering on polarized target (HJET) protons for the...
Dr
Brad Sawatzky
(Jefferson Lab)
12/09/2018, 15:30
The last several years of Jefferson Lab's 6~GeV physics program saw a
wealth of nucleon spin structure measurements run across several Halls.
In particular, E06-014 (``$d_2^n$") in Hall A (polarized neutron), and
E07-003 (``SANE") in Hall C (polarized proton) took advantage of
significant advances in target design and new/upgraded large solid angle
detector packages to run precision...
Prof.
Dmitriy Toporkov
(Budker institute of nuclear physics, Novosibirsk State University)
12/09/2018, 15:30
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
An experimental setup to obtain polarized hydrogen and deuterium molecules is described. To separate the molecules with different magnetic moments superconducting sextupole magnets of a polarized atomic beam source with a magnetic pole-tip field of 34 kG and a field gradient of 32 kG/cm are used. Arguments explaining the choice of the location of the source elements are also given. To...
Dr
Eric Fuchey
(University of Connecticut)
12/09/2018, 15:40
3D Structure of the Nucleon: GPDs and Form Factors
Parallel Sessions
Generalized Parton Distributions (GPDs) provide a three-dimensional parametrization of the quarks and gluons inside the nucleon, and give a particularly valuable insight on the nucleon spin content and on the orbital angular momentum of quarks and gluons in particular. Knowledge on GPDs may be acquired performing measurements on exclusive electroproduction channels off the nucleon in the deep...
Mr
Daniel Gutiérrez Reyes
(Complutense University of Madrid)
12/09/2018, 15:45
The factorization theorem for DY and semi-inclusive DIS holds for all leading twist transverse momentum distributions. However a QCD perturbative calculation shows several important characteristics of spin-dependent distributions. We consider all the different spin-dependent distributions which can be matched onto integrated twist-2 functions, focusing on the transversity and pretzelosity...
Joan Ruiz Vidal
(IFIC-Valencia)
12/09/2018, 15:50
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
We propose a program of measurements of electric and magnetic dipole moments of charm, beauty and strange baryons at the LHC, based on the phenomenon of spin precession as induced by the intense electromagnetic field between atomic planes of bent crystals. Studies of crystal channeling and spin precession of positively- and negatively-charged particles are presented, along with the expected...
Dr
Haixin Huang
(Brookhaven National Lab)
12/09/2018, 15:50
This talk will discuss the methods and challenges to make a high-precision measurement of hadron polarization in a high collision frequency and luminosity future electron ion colliders.
Prof.
Karl Slifer
(UNH)
12/09/2018, 15:50
Moments of spin structure functions at low Q2 provide a benchmark test
of chiral dynamics, and are necessary input for calculations of atomic
energy levels. We will present the results from the Jefferson Lab
Hall A and C spin structure experiments at low Q2 ("g2p" and "SAGDH").
Dr
Siegfried Martin
(Forschungszentrum Juelich GmbH)
12/09/2018, 16:40
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
This contribution summarizes the efforts in the frame of the CPEDM consortium to design a prototype EDM (Electric Dipole Moment) storage ring, with predominantly electric bending.
Operated at proton beam energies between 30 and 50 MeV, the main purpose of this ring will be to carry out R&D work related to a final 233 MeV frozen-spin proton EDM ring. After demonstrating satisfactory beam...
Prof.
Kenneth Barish
(UC Riverside)
12/09/2018, 16:40
Double helicity asymmetries $A_{LL}$ in hadron, jet and direct photon production in $\vec{p}$+$\vec{p}$ collisions at the Relativistic Heavy Ion Collider (RHIC) are sensitive to the gluon helicity contribution to the proton's spin. Unlike hadrons and jet, direct photon production provides clean access to the polarized gluon distribution since there is no hadronization. However, the small...
Dr
Nodoka Yamanaka
(IPN Orsay)
12/09/2018, 16:40
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
The electric dipole moment (EDM) is a very sensitive probe of CP violation beyond the standard model, and it is measured in many systems such as atoms, neutrons, etc.
The EDM of composite systems may be sensitive to several CP violating processes at the elementary level, but the theoretical evaluations of the CP violation at different physical (atomic, nuclear, hadronic) hierarchies are...
Prof.
T. Peter Rakitzis
(IESL-FORTH)
12/09/2018, 16:40
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
It is known theoretically and from scattering experiments that nuclear spin polarization increases the cross sections of the D-T and D-3He reactions by 50%, while also spatially aligning the recoil directions of the reactions products, which can be used to improve the efficiency of reactors [1]. However, the lack of a sufficiently intense source of spin-polarized deuterium (SPD) has not yet...
Prof.
Anatolii Efremov
(JINR, Dubna)
12/09/2018, 16:40
Main results of DSPIN-17 Workshop are presented.
Mr
Dito Shergelashvili
(MA)
12/09/2018, 17:00
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The JEDI (Jülich Electric Dipole moment Investigations) collaboration carries out preparations, R&D and a first proof-of-principle measurement for the challenging project to measure permanent electric dipole moments of charged particles using a storage ring. In the long term, the experiments are targeted at the construction of a novel storage ring including a new polarimeter based on inorganic...
Mr
Taebong Moon
(Yonsei University/RIKEN)
12/09/2018, 17:00
One of the main goals of the RHIC spin program is the determination of the gluon helicity contribution to the proton spin. This can be accessed by measuring double helicity asymmetries ($A_{LL}$) of pion production at mid-rapidity in longitudinally polarized proton collisions. The ordering of the asymmetries with the charge of the final state pions can in addition directly infer the sign of...
Prof.
Roumen Tsenov
(JINR)
12/09/2018, 17:00
We review the status of the Spin Physics Detector (SPD) project at the NICA accelerator complex now in construction at the JINR, Dubna. After a short introduction to the beams of polarized particles expected to be available at the NICA collider and their characteristics, we give some account on physics tasks that can be performed with colliding polarized protons and deuterons. Based on that, a...
Prof.
Markus Büscher
(Forschungszentrum Jülich/PGI-6 and Heinrich Heine University Düsseldorf)
12/09/2018, 17:05
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
Laser-driven particle acceleration has undergone impressive progress in recent years. Nevertheless, one unexplored issue is how the particle spins are influenced by the huge magnetic fields inherently present in the plasmas. In the framework of the JuSPARC (Juelich Short-Pulse Particle and Radiation Center) facility and of the ATHENA consortium, the laser-driven generation of polarized proton...
Jose Osvaldo Gonzalez Hernandez
(TO)
12/09/2018, 17:05
The most recent SIDIS measurements have challenged our understanding of factorization theorems in QCD. In order to perform reliable
extractions of transverse momentum dependent functions (TMDs) it is essential
to understand the extent to which the errors of factorization are under
control. In this talk I will discuss about the issues encountered when comparing theory and experiment. I will...
Mr
Fabian Müller
(Forschungszentrum Jülich)
12/09/2018, 17:20
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The JEDI (Jülich Electric Dipole moment Investigations) collaboration performs
a set of experiments at the COSY storage ring in Jülich, within the R&D phase to search for the Electric Dipole Moments (EDMs) of charged particles. A measurement of proton and deuteron EDMs is a sensitive probe of yet unknown CP violation. An EDM observation would also be an indication for physics beyond the...
Christopher Dilks
(Pennsylvania State University)
12/09/2018, 17:20
The contribution to the spin of the proton from the gluon helicity is starting to come into focus: for
gluons carrying a large fraction $x$ of the proton momentum, evidence of positive gluon polarization has
been observed, via measurements of the longitudinal double-spin asymmetry $A_{LL}$ for inclusive jet and
dijet production. $A_{LL}$ is sensitive to the polarized gluon distribution...
Dr
Rajan Gupta
(Los Alamos National Lab)
12/09/2018, 17:20
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
In this talk, I will review the opportunities for and challenges to calculating
all CP violating operators up to dimension 6 that contribute to the neutron EDM.
These include the Theta-term, quark EDM, quark chromo EDM, Weinberg and 4-quark
operators. Major focus of the talk will be on evaluating the numerical signal
and renormalization and mixing between operators. Results for the quark...
Dr
Andrew Chen
(University of Illinois Urbana-Champaign)
12/09/2018, 17:20
Although the proton was discovered about 100 years ago, its spin structure still remains a mystery. Recent studies suggest that the orbital angular momentum of sea antiquarks could significantly contribute to the proton's spin. The SeaQuest experiment, which recently completed data collection, probed the unpolarized light sea antiquark distributions of the proton using the Drell-Yan process....
Mr
Sina Tafti
(University of Virginia)
12/09/2018, 17:30
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
The possibility of spin-polarized fusion was introduced a few decades ago with the promise of a 50 % boost in the fusion cross section between Deuterium (D) and Tritium (T) in reaction D + T → He-5 → α + n. The same enhancement is expected in the isospin-mirrored fusion reaction, D + He-3 → Li-5 → α + p. This increase occurs if both nuclei fuse when their spins are parallel – i.e. fully...
Nobuo Sato
(Jefferson Lab)
12/09/2018, 17:30
In this talk I will discuss recent progress to understand the large qT spectrum in SIDIS and DY.
Dr
Ting Lin
(Texas A&M University)
12/09/2018, 17:40
One of the primary goals of the RHIC spin program is to determine the spin-dependent gluon distribution, Δg(x), of the proton. The measurements of the 2009 longitudinal double-helicity asymmetry, $A_{LL}$, for mid-rapidity inclusive jet and π^0 production in polarized proton+proton collisions at the center-of-mass energy √s = 200 GeV place strong constraints on Δg(x). They also for the first...
Dr
Valery Tyukin
(Inst. of Nuclear Phys, University Mainz, Germany)
12/09/2018, 17:40
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
One aim for the new electron accelerator MESA is to measure the weak mixing angle in electron proton scattering to a precision of 0.14\%. The beam polarization significantly contributes to this measurement. The Møller polarimeter proposed by V. Luppov and E. Chudakov opens the way to reach a sufficiently accurate determination of polarization. At the moment the polarized atomic hydrogen target...
Prof.
Kenneth Barish
(UC Riverside)
12/09/2018, 17:40
The STAR experiment is planning to upgrade the forward rapidity region (2.5 < eta < 4.5) to enable novel measurements in pp, pA and AA collisions. The STAR forward upgrade is motivated by exploration of cold QCD physics in the very high and low regions of x. But it is specifically noted that the forward upgrade will also provide new detector capabilities at RHIC and STAR to explore the...
Francesco Hautmann
(University of Oxford)
12/09/2018, 17:55
Collinear and transverse momentum dependent (TMD) parton densities are obtained from fits to precision measurements of deep inelastic scattering (DIS) cross sections at HERA. The parton densities are evolved
by DGLAP evolution with next-to-leading-order (NLO) splitting functions using the parton branching method, allowing one to determine simultaneously collinear and TMD densities for all...
Andras Laszlo
(Wigner Research Centre for Physics of the Hungarian Academy of Sciences)
12/09/2018, 17:55
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
In a recent paper (https://doi.org/10.1088/1361-6382/aacfee), a general relativistic (GR) calculation was presented on the Earth's gravitational effect in a mixed magnetic-electric frozen spin storage ring on the spin transport. It was shown that GR causes a precession out of the orbital plane in a frozen spin ring, i.e. a slow vertical polarization buildup will be present, given that the...
Mrs
Ruth Kempf
(Johannes Gutenberg-Universität Mainz, Institut für Kernphysik)
12/09/2018, 18:00
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The P2-experiment will measure the weak mixing angle with an all-time high precision via electron-proton scattering. The measured physics asymmetry and its uncertainty has to be corrected by the apparative
asymmetry, which is generated by helicity correlated fluctuations of the beam parameters position, angle, intensity and energy. In this talk will be described how the high precision of...
Werner Vogelsang
(Univ. Tuebingen)
12/09/2018, 18:00
We discuss the processes pp --> (jet h) X and pp --> (\gamma h) X,
for which a specific hadron or photon is observed inside a fully
reconstructed jet. We present NLO results for the corresponding
cross sections and show that the results can be cast into simple
and systematic forms based on suitable universal jet functions.
We present phenomenological results for experiments at the...
Dr
Alexander Bazilevsky
(Brookhaven National Laboratory)
12/09/2018, 18:00
sPHENIX is a major upgrade of the PHENIX experiment at Brookhaven National Laboratory’s Relativistic Heavy Ion Collider (RHIC), designed for detailed studies of the Quark Gluon Plasma created in heavy ion collisions, with focus on jet, photon and heavy flavor measurement capabilities. With its excellent tracking and full calorimetry (hadronic and electromagnetic) in the central...
Prof.
Bernd Surrow
(Temple University)
13/09/2018, 09:00
Understanding the properties of nuclear matter and its emergence through the underlying partonic structure and dynamics of quarks and gluons requires a new experimental facility in hadronic physics known as the Electron-Ion Collider (EIC). A US-based facility capable of colliding high-energy polarized electron and ion beams at high luminosity has been envisaged for a long time and articulated...
Renee Fatemi
(University of Kentucky)
13/09/2018, 09:40
For decades, jets have served as the tool of choice at colliders around the world. They have been used to search for new particles and to probe the inner workings of Quantum Chromodynamics. The jet community continues to innovate and thrive, responding to the experimental and theoretical challenges posed by the TeV scale beam energies at the Large Hadron Collider and the extreme backgrounds...
Paolo Pedroni
(INFN-Pavia)
13/09/2018, 10:20
Spin Physics in Nuclear Reactions and Nuclei
Plenary Sessions (for INVITED PLENARY TALKS only!)
Pion photoproduction and Compton scattering are powerful tools
to precisely determine the nucleon structure, thus providing
very stringent tests for all non-perturbative QCD models.
The different observables accessible using polarized photon
beams and/or polarized nucleon targets play an essential role
in this experimental research due to their enhanced sensitivity both to
the...
Prof.
Richard Milner
(MIT)
13/09/2018, 11:30
Prof.
Frank Maas
(Helmholtz-Institut Mainz)
13/09/2018, 11:50
Dr
Andreas Wirzba
(Forschungszentrum Juelich)
13/09/2018, 12:10
Dr
Christopher Keith
(Jefferson Lab)
13/09/2018, 12:30
Mr
Mikhail Kulikov
(JINR)
13/09/2018, 14:30
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
Conceptual design of the absolute polarimeter APol with an internal polarized atomic hydrogen/deuterium jet target for NICA collider is presented. It is proposed to install the polarimeter into the “warm” gap of the collider ring arc. The polarized jet will cross both accelerated beams. The jet target is based on the classical atomic beam source principle. Expected target thickness of the jet...
Dr
Polina Kravchenko
(PNPI NRC Kurchatov institute)
13/09/2018, 14:30
A comprehensive collection of results on longitudinal double-spin asymmetries is presented for charged pions and kaons produced in semi-inclusive deep-inelastic scattering of electrons and positrons on the proton and deuteron, based on the full HERMES data set. The dependence of the asymmetries on hadron transverse momentum and azimuthal angle extends the sensitivity to the flavor structure of...
Prof.
Wilson Miller
(University of Virginia)
13/09/2018, 14:30
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
The first biological magnetic resonance images of laser-polarized xenon-129 were published in 1994, in a seminal paper in Nature. In addition to the first proof-of-concept images in a mouse lung, this paper presented a variety of advanced human imaging possibilities ranging from simple ventilation imaging in the lung to dissolved-phase imaging of xenon-129 in the brain. Almost 25 years later,...
Daniel Boer
(University of Groningen)
13/09/2018, 14:30
This talk will review from a theoretical point of view possibilities to measure spin effects at a high-energy Electron-Ion Collider (EIC). Various types of spin distributions will be reviewed and promising observables will be discussed.
Ms
Sabrina Cotogno
(Vrije Universiteit Amsterdam and Nikhef)
13/09/2018, 14:30
In processes where two quarks are extracted from the proton to enter two separate hard scatterings (double parton scattering), the interparton correlations can have an impact on the size of the cross section and significantly alter the distributions of particles in the final state.
In this work, we employ different models for the double parton distributions (DPDs) to study the quantum...
Dr
Vladimir Ladygin
(VBLHEP JINR)
13/09/2018, 14:50
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The spin program at SPD NICA as well as the experiments at Nuclotron
require high intensity polarized proton and deuteron beams with high value of the polarization.
The upgraded deuteron beam polarimeter at internal target at Nuclotron [1] has been used to obtain the vector and tensor polarization for 6 different spin modes of new polarized source of ions [2]. The values of the beam...
Dr
fabienne kunne
(CEA saclay)
13/09/2018, 14:50
For the first time, the K-/K+ multiplicity ratio was measured in deep-inelastic scattering for kaons carrying a large fraction z of the virtual-photon energy. The data were obtained using a 160 GeV muon beam and an isoscalar 6LiD target. They cover the range 0.01 < x < 0.4, z> 0.75, Q2 > 1 (GeV/c)2, and W > 5 GeV/c2. For values of z larger than 0.8, the results contradict expectations obtained...
Dr
Salvatore Fazio
(Brookhaven National Laboratory)
13/09/2018, 14:50
The American 2015 nuclear physics long-range plan endorsed the realization of an electron-ion collider (EIC) as top priority for a next large construction project in the United States.
With the design of an EIC, advancements in theory and further development of phenomenological tools, we are now preparing for the next step in subnuclear tomographic imaging. The collider's large range of...
Mr
Sina Tafti
(University of Virginia)
13/09/2018, 14:55
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
Over the past few decades, spin-polarized noble gases He-3 and Xe-129 have been used extensively as imaging media for magnetic resonance imaging (MRI) in medical research to characterize abnormalities in the lungs such as chronic obstructive pulmonary disease (COPD), which is the 4th leading cause of death worldwide. In particular, diffusion-weighted magnetic resonance imaging (DW-MRI) of...
Dr
Liang Zheng
(China University of Geosciences (Wuhan))
13/09/2018, 15:10
In this work, we present a systematic study on the feasibility of probing the
largely unexplored transverse momentum dependent gluon Sivers function (GSF) in
open charm production, high p$_T$ charged di-hadron and di-jet production at a future high energy, high luminosity Electron-Ion Collider (EIC). The Sivers function is a measure for the anisotropy of the parton distributions in momentum...
Dr
Nikolay Piskunov
(JINR, Dubna)
13/09/2018, 15:10
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
Analyzing powers for polarized neutrons have been measured only for thin hydrogen targets. Cross sections and analyzing powers for np, for both elastic scattering and charge exchange are known up to 29 GeV/c. No data exist for thick analyzers.
During two beam runs in the years 2016 and 2017, the analyzing powers for protons and neutrons scattering on CH2, CH, C and Cu targets were measured...
Qinghua Xu
(Shandong University)
13/09/2018, 15:10
The contribution from the sea quark polarization to the nucleon spin is an important piece for complete understanding of the nucleon spin structure. The production of W bosons in longitudinally polarized p+p collisions at RHIC provides a unique probe to the sea quark polarization, through the parity-violating single-spin asymmetry, AL. At STAR, the W bosons through the W→eν channel at...
Prof.
Dieter Ries
(Institute of Nuclear Chemistry, Johannes Gutenberg University Mainz, Germany)
13/09/2018, 15:20
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
Ultracold Neutrons (UCN), neutrons with kinetic energies below 335
neV, provide a unique tool for fundamental neutron research with long
observation times.
The τSPECT experiment, which is currently being commissioned at
the pulsed UCN source of the TRIGA Mainz, aims to utilize this fact
in order to precisely measure the free neutron lifetime.
In order to reduce systematic errors with...
Caroline Riedl
(University of Illinois at Urbana-Champaign)
13/09/2018, 15:20
An overview of pion-induced Drell-Yan (DY) scattering at COMPASS is given. In 2015, COMPASS was scattering a 190 GeV pion beam off a transversely polarized proton target and unpolarized nuclear targets. The Sivers asymmetry, and other spin-dependent azimuthal asymmetry amplitudes, were extracted from these data. The Sivers asymmetry is of particular interest since it is expected to change sign...
Brian Page
(Brookhaven National Lab)
13/09/2018, 15:30
Jets have been important observables in high-energy collider experiments for over four decades and have provided discoveries and insights in electron-positron, electron-hadron, hadron-hadron, and nucleus-nucleus collisions. With advances in experimental technique and theoretical understanding, jets have become precision tools in the exploration of QCD. As the primary purpose of the future...
Dr
Sanghwa Park
(Stony Brook University)
13/09/2018, 15:30
The measurement of the single spin asymmetries of parity violating W boson production in longitudinally polarized proton collisions provides unique and clean access to the light sea quark helicity distributions. The W boson couples only to left-handed quarks and right-handed anti quarks, and hence one can directly relate the charge of the W with initial state quark flavors. The PHENIX...
Mr
Michal Dragowski
(University of Warsaw, Faculty of Physics)
13/09/2018, 15:30
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The effects of multiple interactions of electrons passing through matter cannot be calculated analytically, thus simulation tools have to be used to reliably model polarimetric measurements. A new method for simulation of polarized electron interactions, based on the commonly used Geant4 Monte Carlo package, will be presented.
In case of polarized electron beams in the MeV energy range,...
Dr
Guillaume Pignol
(Université Grenoble Alpes)
13/09/2018, 15:45
Application of Nuclear Polarization Techniques to Other Fields
Parallel Sessions
Experiments searching for a permanent electric dipole moment of the neutron (nEDM) aim at discovering new sources of CP violation beyond the Standard Model of particle physics and understanding the origin of the matter-antimatter asymmetry of the Universe.
In recent experiments, polarized ultracold neutrons are stored in material bottles, subject to a strong electric field and a weak stable...
Dr
Harut Avagyan
(Jefferson Lab)
13/09/2018, 15:50
The study of the 3D nucleon structure by probing the
transverse momentum dependent (TMD) distributions of partons
in Semi-Inclusive DIS is widely accepted as one of the main
goals of the future Electron Ion Collider (EIC).
Much wider kinematical coverage, and in particular higher PT
and Q2, would allow validating and extending studies of
evolution properties of TMDs planned at JLab12,...
Dr
Yann Bedfer
(CEA Saclay)
13/09/2018, 16:40
The study of the longitudinal spin structure is one of the main objectives of the COMPASS experiment at CERN. It achieves this objective via spin-dependent measurements, both inclusive and semi-inclusive. In this talk, I will first present the final results obtained by inclusive measurements, including the spin dependent structure function g1 and derivatives obtained from it. Secondly, I will...
Dr
Miguel Echevarria
(INFN Pavia)
13/09/2018, 16:40
A fixed-target experiment using the LHC beams with a polarized target would offer a unique opportunity to study the internal structure of the nucleon. Recent studies have shown that a number of spin and azimuthal asymmetries are large enough to be precisely measured, allowing to constrain several non-perturbative functions which encode the three-dimensional spin structure of the nucleon, as...
Dr
Fanglei Lin
(Jefferson Lab)
13/09/2018, 16:40
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
An Electron-Ion Collider (EIC) is proposed as the first lepton-hadron collider in the world with both beams polarized. The nuclear physics program requires high polarizations, long polarization lifetimes, and unique capabilities of polarization control in both collider rings. The electron polarization must be longitudinal at the interaction points in the whole energy range of 3 to 10 GeV while...
Wim Cosyn
(Ghent University)
13/09/2018, 17:00
Tagged DIS measurements on a polarized deuteron are possible at an electron-ion collider (EIC) with forward proton and neutron detectors. Using the pole extrapolation method, where one extrapolates to the on-shell pole of the struck nucleon, this would enable the extraction of high precision neutron (spin) structure functions in a wide range of $x,Q^2$. We outline the general form of the SIDIS...
Eliana Gianfelice-Wendt
(Fermilab)
13/09/2018, 17:00
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
A hadron/lepton collider with polarized beams has been under consideration
by the scientific community since some years, in the U.S. and Europe.
Among the various proposals, those by JLAB and BNL with polarized electron
and proton beams are currently under closer study in the U.S.
In the BNL Ring-Ring design electrons are stored at top energy
in a ring to be accommodated in the...
Prof.
Gary Goldstein
(Tufts University)
13/09/2018, 17:05
Gluon pdf’s, GPD’s and TMD’s play a significant role in an array of scattering processes, including SIDIS, DVCS, exclusive meson electroproduction and p p scattering. Spin dependent gluon distributions can lead to distinctive features in the angular dependences and asymmetries of the scattering processes. Of particular interest are heavy quark production processes, wherein spin observables of...
Dr
Vadim Ptitsyn
(BNL)
13/09/2018, 17:20
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
Longitudinal polarization of electron beam in the interaction point is an essential requirement for designs of electron-ion colliders developed in BNL and JLab. In electron energy range of these colliders the spin rotators on the basis of interleaved solenoidal and dipole magnets presents a most realistic design choice. But, the rotator insertions have to be spin-matched in order to minimize...
Dr
Vahid Ranjbar
(BNL)
13/09/2018, 17:40
Acceleration, Storage and Polarimetry of Polarized Beams
Parallel Sessions
The proposed polarized injector for eRHIC, the rapid cycling synchrotron (RCS) is designed to preserve polarization over the accelerating energy range from 400 MeV to 18 GeV. We present progress on the existing design.
Mr
Qin-Tao Song
(Sokendai/KEK)
13/09/2018, 17:40
There exist polarized structure functions b_{1-4} for the spin-one deuteron. These functions probe very different nature of hadron spin physics from the longitudinally-polarized distributions measured by g_1 for the nucleon. The twist-two structure functions b_1 and b_2 are expressed by tensor-polarized parton distribution functions (PDFs), which indicate unpolarized parton distributions in...
Qinghua Xu
(Shandong University)
13/09/2018, 17:55
The longitudinal or transverse spin transfer to Lambda and anti-Lambda hyperons in polarized proton-proton collisions is expected to be sensitive to the helicity or transversity distributions of strange and anti-strange quarks of the proton, and to the corresponding polarized fragmentation function. We report the first measurement of the transverse spin transfer to Lambda and anti-Lambda along...
Zhiwen Zhao
(Duke University)
13/09/2018, 18:00
The 3D imaging of nucleon is at the frontier of understanding visible Universe and QCD. There are many efforts to access the nucleon's 3D partonic structure both in the transverse coordinate space (Generalized Parton Distributions) and in the transverse momentum space (Transverse Momentum Dependent distributions). The proposed Solenoidal Large Intensity Device (SoLID) in Hall A at Jefferson...
Dr
James Drachenberg
(Abilene Christian University)
14/09/2018, 09:20
Dr
Cedric Lorce
(Ecole polytechnique, Paris-Saclay U.)
14/09/2018, 09:40
Dr
Yordanka Ilieva
(University of South Carolina)
14/09/2018, 10:40
Dr
Rajan Gupta
(Los Alamos National Lab)
14/09/2018, 11:30
The remarkable result, from the measurements of spin asymmetry in
polarized deep inelastic scattering by the EMC collaboration, that the
sum of the spins of the quarks contributes less than half of the total
spin of the proton lay down the challenge to explain this “proton spin
crisis” from QCD. I will show that calculations of the required
matrix elements using Lattice QCD are now in a...
Prof.
Tommaso Calarco
(University of Cologne and Jülich Research Centre)
14/09/2018, 12:10
The coherent manipulation of individual quantum degrees of freedom, such as single spins, was long considered to be possible only in thought experiments. At the end of last century this became routine in labs around the world, opening up new possibilities for technological applications. Pseudospins associated to electronic states in single trapped atoms or to quantum electronic circuits can be...
Andrea Bressan
(TS)
Nucleon Helicity Structure
Parallel Sessions
The spin-dependent structure function g_2 of the proton has been exacted
by the COMPASS experiment (SPS, CERN) from DIS data collected in 2010
using 160 GeV/c muon beam and transversely polarized NH_3 target. Within
the so-called Wandzura-Wilczek approximation, g2 can be related to the
spin-dependent structure function g_1 while from the constraints imposed
by Lorentz invariance...
Ms
Man Jiao
(University of Science and Technology of China)
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Poster
Recently, single NV center in diamond as a quantum sensor has been proposed and utilized to explore electron-nucleon monopole-dipole interaction, which sets a constraint for the electron–nucleon coupling, g_s^N g_p^e, with the force range 0.1–23 μm.(1) A new laboratory bound on the axial-vector mediated interaction between electron spins at micrometer scale is established with single...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
Spin Physics in Nuclear Reactions and Nuclei
Poster
The process of emission of two identical particles with
nonzero spin $S$ and different helicities in relativistic
heavy-ion collisions is theoretically
investigated within the model of one-particle multipole
sources. Taking into account the unitarity of the finite
rotation matrix and the symmetry relations for $d$-functions,
the general expression for the probability of emission of
...
peter cameron
(Independent Researcher)
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Poster
An analysis of proton structure and spin based upon an electromagnetic model of geometric wavefunction interactions was presented to Spin 2016 [1]. A key point of that analysis was the supposition that only observed components of the eight-component Pauli wavefunction (electric charge, magnetic flux quantum, and magnetic moment) comprise the stable proton wavefunction. The dark components...
Paride Paradisi
(Univesity of Padova and INFN)
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Parallel Sessions
We summarize the status of charged lepton flavor violation (cLFV) in models beyond the SM. The interrelationship among leptonic g-2, EDMs
and cLFV will be emphasized as a tool to disentangle among different
NP scenarios.
Dr
Pawel Nadel-Turonski
(Jefferson Lab)
Future Facilities and Experiments
Parallel Sessions
The Electron-Ion Collider (EIC) is intended to be the next-generation US facility for the study of the strong interaction. Its unique capability to accelerate beams of polarized protons and light nuclei, as well as unpolarized nuclei over the full mass range, will, for the first time, make it possible to directly probe the gluon fields that bind nuclei. Excellent near-beam detection of...
Ms
Michaele Suisse
(Independent Researcher)
Fundamental Symmetries and Spin Physics Beyond the Standard Model
Poster
A century’s proliferation of Quantum Interpretations[1] has been driven by an incomplete understanding of the measurement problem[2], by an incomplete understanding of the unobservable wavefunction and its unobservable interactions. Yet it remains that the observer effect - observing a phenomenon necessarily changes that phenomenon - is at the historical foundation of quantum mechanics. The...
Dr
Valery Lyuboshitz
(Joint Institute for Nuclear Research ( Dubna ))
Spin Physics in Nuclear Reactions and Nuclei
Poster
The theoretical study of spin structure for the processes
of lepton pair production by pairs of photons ( which, in particular, may be emitted in relativistic heavy-ion and hadron-nucleus collisions ) is performed. For the two-photon process $\gamma \gamma \rightarrow
e^+ e^-$, it is found that -- in the case of unpolarized primary photons -- the final electron and positron remain also...
Dr
Jean-Pierre DIDELEZ
(IPN CNRS/IN2P3 & Université Paris-Sud (UMR-CNRS 8608), 91406 ORSAY, France)
Application of Nuclear Polarization Techniques to Other Fields
Poster
The parallel polarization of D and T nuclei should increase the reactivity of the fuel used, both in Magnetic Confinement Fusion (MCF) and Inertial Confinement Fusion (ICF). One has to make sure however, i) that the polarization will survive at high temperature in the MCF and ICF very different plasma conditions, ii) that high polarization rate for useable quantities of material can be...
Mr
Kenta Yabe
(Niigata University)
3D Structure of the Nucleon: TMDs
Parallel Sessions
We discuss the contribution of the twist-3 fragmentation function to the production of transversely polarized hyperons in unpolarized proton-proton collisions. In the framework of the collinear factorization, this contribution arise from the quark fragmentation correlators corresponding to the twist-3 quark fragmentation functions(FFs) and especially from the gluon fragmentation correlators...
