Speaker
Mr
Shengying ZHAO
(Institut de Physique Nucléaire Orsay)
Description
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 transverse position and the longitudinal momentum of partons.
Double Deeply Virtual Compton Scattering (DDVCS) corresponds to the scattering from the nucleon of a virtual photon that finally generates a lepton pair ep→epγ∗→epl+l− where the final leptons can be either an e+e− or a μ+μ− pair. The virtuality of the final photon allows investigating in a decorrelated way the initial and transferred momentum dependences of the GPDs, as opposed to Deeply Virtual Compton scattering (DVCS) accessing unambiguously GPDs in a correlated way. This unique feature of DDVCS allows investigation of the transferred momentum dependence of GPDs which is of relevance, among others, for the determination of the transverse parton densities and the distribution of nuclear forces.
This presentation will discuss model-predicted DDVCS experimental observables at different kinematical regimes (JLab 12 GeV, EIC) and will address the impact of potential DDVCS experiments.
Primary author
Mr
Shengying ZHAO
(Institut de Physique Nucléaire Orsay)
