Thumbnail Image
Publication

Longitudinal Target-Spin Asymmetries for Deeply Virtual Compton Scattering

Seder, E.
; 
Joo, K.
; 
Gohn, W.
; 
Bosted, P.
; 
Griffioen, K. A.
Abstract
A measurement of the electroproduction of photons off protons in the deeply inelastic regime was performed at Jefferson Lab using a nearly 6 GeV electron beam, a longitudinally polarized proton target, and the CEBAF Large Acceptance Spectrometer. Target-spin asymmetries for ep. e'p'gamma. events, which arise from the interference of the deeply virtual Compton scattering and the Bethe-Heitler processes, were extracted over the widest kinematics in Q(2), x(B), t, and phi, for 166 four-dimensional bins. In the framework of generalized parton distributions, at leading twist the t dependence of these asymmetries provides insight into the spatial distribution of the axial charge of the proton, which appears to be concentrated in its center. These results also bring important and necessary constraints for the existing parametrizations of chiral-even generalized parton distributions.
Description
Date
2015-01-01
Journal Title
Journal ISSN
Volume Title
Publisher
Collections
Physics
Show all metadata
Download Dataset
Files
Thumbnail Image
Longitudinal_Target_Spin_Asymmetries_for_Deeply_Virtual_Compton_Scattering.pdf
Adobe PDF, 343.06 KB
Rights Holder
Usage License
Embargo
Research Projects
Organizational Units
Journal Issue
Keywords
Citation
Advisor
Department
Physics
DOI
https://doi.org/10.1103/PhysRevLett.114.032001
URI
https://scholarworks.wm.edu/handle/internal/344
Embedded videos