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Title: Exclusive η electroproduction at W > 2 GeV with CLAS and transversity generalized parton distributions

The cross section of the exclusive η electroproduction reaction ep → e'p'η was measured at Jefferson Laboratory with a 5.75 GeV electron beam and the CLAS detector. Differential cross sections d 4σ/dtdQ 2dx Bη and structure functions σ U = σ T + εσ L, σ TT, and σ LT, as functions of t, were obtained over a wide range of Q 2 and x B. The η structure functions are compared with those previously measured for π 0 at the same kinematics. At low t, both π 0 and η are described reasonably well by generalized parton distributions (GPDs) in which chiral-odd transversity GPDs are dominant. As a result, the π 0 and η data, when taken together, can facilitate the flavor decomposition of the transversity GPDs.
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Publication Date:
Report Number(s):
JLAB-PHY-16-2330; DOE/OR/23177-3920
Journal ID: ISSN 2469-9985; PRVCAN; TRN: US1700628
Grant/Contract Number:
AC05-06OR23177; AC02-06CH11357; SC0016583
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); George Washington Univ., Washington, DC (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); Centre National de la Recherche Scientifique (CNRS); Commissariat a l’Energie Atomique (CEA); Instituto Nazionale di Fisica Nucleare (INFN); National Research Foundation of Korea (NRF); United Kingdom Science and Technology Facilities Council
Contributing Orgs:
CLAS Collaboration
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1347207
Alternate Identifier(s):
OSTI ID: 1346588; OSTI ID: 1375903; OSTI ID: 1439801