Deeply Virtual Compton Scattering at CLAS

Conference · Mon Sep 01 04:00:00 EDT 2008

DOI:https://doi.org/10.3360/dis.2008.93· OSTI ID:1996491

Niccolai, Silvia

The exclusive electroproduction of real photons and mesons at high momentum transfer allows us to access the Generalized Parton Distributions (GPDs), which provide a unified description of hadronic structure in terms of quark and gluonic degrees of freedom. In particular, Deeply virtual Compton scattering (DVCS), ep ? e'p',? is one of the key reactions to determine the GPDs experimentally, as it is the simplest process that can be described in terms of GPDs. A dedicated experiment to study DVCS has been carried out in Hall B at Jefferson Lab. Beam-spin asymmetries, resulting from the interference of the Bethe-Heitler process and DVCS have been extracted over the widest kinematic range ever accessed for this reaction (1 < Q2 < 3.7 (GeV/c)2, 0.09 < -t < 1.3 (GeV/c)2, 0.1 < xB < 0.58). In this paper, the results obtained experimentally are shown and compared to GPD parametrizations.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1996491
• Report Number(s): JLAB-PHY-08-834; DOE/OR/23177-0671
• Country of Publication: United States
• Language: English