Nuclear effects and neutron structure in deeply virtual Compton scattering off 3He

14th Conference on Theoretical Nuclear Physics in Italy

Rinaldi, Matteo^1

Dipartimento di Fisica e Geologia, Università Degli Studi di Perugia, INFN Sezione di Perugia, Via A. Pascoli, 06100 Perugia, Italy^1

关键词: Deeply virtual compton scatterings;    Generalized parton distributions;    Hadronic physics;    Impulse approximation;    Jefferson Lab;    Low momentum transfers;    Non-trivial;    Nuclear effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/527/1/012027/pdf
DOI  :  10.1088/1742-6596/527/1/012027

来源: IOP

【 摘 要 】

The study of nuclear generalized parton distributions (GPDs) could be a crucial achievement of hadronic physics since they open new ways to obtain new information on the structure of bound nucleons, in particular, to access the neutron GPDs. Here, the results of calculations of3He GPDs in Impulse Approximation (IA) are presented. The calculation of the sum of GPDs H + E, and , with the correct limits, will be shown. These quantities, at low momentum transfer, are largely dominated by the neutron contribution so that3He is an ideal target for these kind of studies. Nevertheless the extraction of neutron information from future3He data could be non trivial. A procedure, which takes into account nuclear effects encoded in IA, is presented. The calculation of H, E and allows also to evaluate the cross section asymmetries for deeply virtual compton scattering (DVCS) at Jefferson Lab kinematics. Thanks to these observations, DVCS off3He could be an ideal process to access the neutron information in the next future.