Studies of GPDs at Jefferson Lab: results and future experiments

Journal Article · Fri Jan 05 00:00:00 EST 2018 · Journal of Physics. Conference Series

DOI:https://doi.org/10.1088/1742-6596/938/1/012003· OSTI ID:1418971

Biselli, Angela ^[1]

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1. Fairfield Univ., Fairfield, CT (United States)

Here, the Generalized Parton Distributions (GPDs) have emerged as a universal tool to describe hadrons in terms of their elementary constituents, the quarks and the gluons. Deeply Virtual Compton Scattering (DVCS) on a proton or neutron (N), eN → e'N'γ, is one of the simplest processes that can be described in terms of GPDs. The amplitudes of DVCS and Bethe-Heitler, process where a photon is emitted by the incident or scattered electron, can be accessed via cross section measurements or exploiting their interference which give rise to spin asymmetries. Spin asymmetries, cross sections and cross-section differences can be connected to different combinations of the four leading order GPDs (H, E, $$\tilde{H} $$, $$\tilde{E} $$) for the two quark flavors depending on the observable and the type of target.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
• Contributing Organization: CLAS collaboration
• Grant/Contract Number: AC05-06OR23177
• OSTI ID: 1418971
• Report Number(s): DOE/OR/23177--4344; JLAB-PHY--18-2642
• Journal Information: Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Vol. 938; ISSN 1742-6588
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS