Conveners
Spin physics in Nuclear Reactions and Nuclei
- Or Hen (MIT)
- Francesco Becattini (FI)
Spin physics in Nuclear Reactions and Nuclei
- Or Hen (MIT)
- Francesco Becattini (FI)
Spin physics in Nuclear Reactions and Nuclei
- Or Hen (MIT)
- Francesco Becattini (FI)
Spin physics in Nuclear Reactions and Nuclei
- Francesco Becattini (FI)
- Or Hen (MIT)
-
Dr Igor Korover (NRCN)10/09/2018, 14:30Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Mr Reynier Cruz Torres (MIT)10/09/2018, 14:50Spin Physics in Nuclear Reactions and NucleiParallel SessionsDue 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...Go to contribution page
-
Dr Vladimir Ladygin (VBLHEP JINR)10/09/2018, 15:10Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Prof. Elena Long (University of New Hampshire)10/09/2018, 15:30Spin Physics in Nuclear Reactions and NucleiParallel SessionsWhenever 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....Go to contribution page
-
Prof. Israel Mardor (Tel Aviv University, Tel Aviv, Israel)10/09/2018, 16:40Spin Physics in Nuclear Reactions and NucleiParallel SessionsI 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...Go to contribution page
-
156. Measurement of Vector and Tensor Asymmetries in Quasielastic Electron Scattering from DeuteriumProf. Richard Milner (MIT)10/09/2018, 17:00Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Dr Sergey Dymov (INFN)10/09/2018, 17:20Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Prof. Yury Uzikov (Joint Institute for Nuclear Researches)10/09/2018, 17:40Spin Physics in Nuclear Reactions and NucleiParallel SessionsIntrinsic 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...Go to contribution page
-
Katherine Woodruff (New Mexico State University)11/09/2018, 14:30Spin Physics in Nuclear Reactions and NucleiParallel SessionsOne 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...Go to contribution page
-
Dr Carlos Ayerbe Gayoso (The College of William and Mary)11/09/2018, 15:05Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Marco Ripani (GE)11/09/2018, 15:40Spin Physics in Nuclear Reactions and NucleiParallel SessionsSeveral 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...Go to contribution page
-
Mr George Prokhorov (JINR), Prof. Oleg Teryaev (JINR)11/09/2018, 16:40Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page
-
Michal Krelina (Universidad Técnica Federico Santa María)11/09/2018, 17:05Spin Physics in Nuclear Reactions and NucleiParallel SessionsWe 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...Go to contribution page
-
Dr Valery Lyuboshitz (Joint Institute for Nuclear Research ( Dubna ))11/09/2018, 17:30Spin Physics in Nuclear Reactions and NucleiParallel SessionsSpin 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...Go to contribution page
-
Dr Valery Lyuboshitz (Joint Institute for Nuclear Research ( Dubna ))11/09/2018, 17:55Spin Physics in Nuclear Reactions and NucleiParallel SessionsThe 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...Go to contribution page