Conveners
3D Structure of the Nucleon: GPDs and Form Factors
- Cedric Lorce (Ecole polytechnique, Paris-Saclay U.)
- Silvia Niccolai (IPN Orsay)
3D Structure of the Nucleon: GPDs and Form Factors
- Cedric Lorce (Ecole polytechnique, Paris-Saclay U.)
- Silvia Niccolai (IPN Orsay)
3D Structure of the Nucleon: GPDs and Form Factors
- Silvia Niccolai (IPN Orsay)
- Cedric Lorce (Ecole polytechnique, Paris-Saclay U.)
3D Structure of the Nucleon: GPDs and Form Factors
- Cedric Lorce (Ecole polytechnique, Paris-Saclay U.)
- Silvia Niccolai (IPN Orsay)
3D Structure of the Nucleon: GPDs and Form Factors
- Cedric Lorce (Ecole polytechnique, Paris-Saclay U.)
- Silvia Niccolai (IPN Orsay)
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...
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...
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...
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...
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...
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
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
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/$c^2$) $
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
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...
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...
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.
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...
