Abstract
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 d4σ/dtdQ2dxBdφη and structure functions σU=σT+ϵσL,σTT, and σLT, as functions of t, were obtained over a wide range of Q2 and xB. The η structure functions are compared with those previously measured for π0 at the same kinematics. At low t, both π0 and η are described reasonably well by generalized parton distributions (GPDs) in which chiral-odd transversity GPDs are dominant. The π0 and η data, when taken together, can facilitate the flavor decomposition of the transversity GPDs.
| Original language | English |
|---|---|
| Article number | 035202 |
| Journal | Physical Review C |
| Volume | 95 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 10 2017 |
| Externally published | Yes |
Funding
This work was supported in part by the US Department of Energy (DOE) and National Science Foundation (NSF), the French Centre National de la Recherche Scientifique (CNRS) and Commissariat l'Energie Atomique (CEA), the French-American Cultural Exchange (FACE), the Italian Istituto Nazionale di Fisica Nucleare (INFN), the Chilean Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT), the National Research Foundation of Korea, and the UK Science and Technology Facilities Council (STFC). The Jefferson Science Associates (JSA) operates the Thomas Jefferson National Accelerator Facility for the United States Department of Energy under contract DE-AC05-06OR23177.