skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: DVCS with longitudinally polarized target using CLAS at 6 GeV

Abstract

Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single-spin asymmetry (target SSA) in the reaction ep-vector{yields}ep{gamma} is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely H-tilde, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6-GeV polarized electron beam, a polarized solid-state {sup 14}NH{sub 3} target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading-order calculations is in the range of 20% to 40%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q{sup 2} region from 1 to 4 GeV{sup 2}, x{sub B} from 0.15 to 0.55 and -t from 0.1 to 2 GeV{sup 2} providing new constraints on the GPDs.

Authors:
 [1]
  1. Fairfield University, Fairfield, CT 06824 (United States)
Publication Date:
OSTI Identifier:
21316985
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1149; Journal Issue: 1; Conference: 18. international spin physics symposium, Charlottesville, VA (United States), 6-11 Oct 2008; Other Information: DOI: 10.1063/1.3215721; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; CEBAF ACCELERATOR; COMPTON EFFECT; ELECTRON BEAMS; ELECTRON-PROTON INTERACTIONS; FOUR MOMENTUM TRANSFER; GEV RANGE; GLUONS; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; PARTICLE KINEMATICS; PARTICLE PRODUCTION; PARTICLE STRUCTURE; PHOTONS; POLARIZATION; POLARIZED TARGETS; QUANTUM CHROMODYNAMICS; QUARKS; SPIN

Citation Formats

Biselli, Angela. DVCS with longitudinally polarized target using CLAS at 6 GeV. United States: N. p., 2009. Web. doi:10.1063/1.3215721.
Biselli, Angela. DVCS with longitudinally polarized target using CLAS at 6 GeV. United States. https://doi.org/10.1063/1.3215721
Biselli, Angela. 2009. "DVCS with longitudinally polarized target using CLAS at 6 GeV". United States. https://doi.org/10.1063/1.3215721.
@article{osti_21316985,
title = {DVCS with longitudinally polarized target using CLAS at 6 GeV},
author = {Biselli, Angela},
abstractNote = {Deeply Virtual Compton Scattering (DVCS) is one of the simplest processes that can be described in terms of Generalized Parton Distributions (GPDs). The target single-spin asymmetry (target SSA) in the reaction ep-vector{yields}ep{gamma} is directly proportional to the imaginary part of the DVCS amplitude, and gives access to a combination of GPDs namely H-tilde, H, and E. This asymmetry will be measured in a dedicated experiment at Jefferson Lab using the CEBAF 6-GeV polarized electron beam, a polarized solid-state {sup 14}NH{sub 3} target, and the CEBAF Large Acceptance Spectrometer (CLAS) together with the Inner Calorimeter (IC). The expected asymmetry from leading-order calculations is in the range of 20% to 40%, depending on the kinematics and on the GPD model used. The DVCS amplitude will be mapped out in the Q{sup 2} region from 1 to 4 GeV{sup 2}, x{sub B} from 0.15 to 0.55 and -t from 0.1 to 2 GeV{sup 2} providing new constraints on the GPDs.},
doi = {10.1063/1.3215721},
url = {https://www.osti.gov/biblio/21316985}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1149,
place = {United States},
year = {Tue Aug 04 00:00:00 EDT 2009},
month = {Tue Aug 04 00:00:00 EDT 2009}
}