Measurement of Deeply Virtual Compton Scattering With a Polarized-Proton Target

Authors

S. Chen
M. Amarian, Old Dominion UniversityFollow
H. Bagdasaryan, Old Dominion University
M. Bektasoglu, Old Dominion University
S. Bültmann, Old Dominion UniversityFollow
S. L. Careccia, Old Dominion University
K. V. Dharmawardane, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
T. A. Forest, Old Dominion University
G. Gavalian, Old Dominion University
N. Guler, Old Dominion University
C. E. Hyde-Wright, Old Dominion UniversityFollow
H. G. Juengst, Old Dominion University
A. Klein, Old Dominion UniversityFollow
S. E. Kuhn, Old Dominion UniversityFollow
J. Lachniet, Old Dominion University
M. R. Niroula, Old Dominion University
R. A. Niyazov, Old Dominion University
L. M. Qin, Old Dominion University
F. Sabatié, Old Dominion University
S. Tkachenko, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
J. Yun, Old Dominion University
J. Zhang, Old Dominion University
CLAS Collaboration

Document Type

Article

Publication Date

2006

DOI

10.1103/PhysRevLett.97.072002

Publication Title

Physical Review Letters

Volume

97

Issue

7

Pages

072002 (5 pages)

Abstract

The longitudinal target-spin asymmetry A_UL for the exclusive electroproduction of high-energy photons was measured for the first time in e→p→e′pγ. The data have been accumulated at JLab with the CLAS spectrometer using 5.7 GeV electrons and a longitudinally polarized NH₃ target. A significant azimuthal angular dependence was observed, resulting from the interference of the deeply virtual Compton scattering and Bethe-Heitler processes. The amplitude of the sinϕ moment is 0.252±0.042^stat±0.020^sys. Theoretical calculations are in good agreement with the magnitude and the kinematic dependence of the target-spin asymmetry, which is sensitive to the generalized parton distributions ˜H and H.

Comments

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© 2006 The American Physical Society

Original Publication Citation

Chen, S., Avakian, H., Burkert, V. D., Eugenio, P., Adams, G., Amarian, M., . . . Collaboration, C. (2006). Measurement of deeply virtual compton scattering with a polarized-proton target. Physical Review Letters, 97(7), 072002. doi:10.1103/PhysRevLett.97.072002

ORCID

0000-0002-5680-1814 (Bueltmann), 0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn), 0000-0001-5416-2900 (Weinstein)

Repository Citation

Chen, S.; Amarian, M.; Bagdasaryan, H.; Bektasoglu, M.; Bültmann, S.; Careccia, S. L.; Dharmawardane, K. V.; Dodge, G. E.; Forest, T. A.; Gavalian, G.; Guler, N.; Hyde-Wright, C. E.; Juengst, H. G.; Klein, A.; Kuhn, S. E.; Lachniet, J.; Niroula, M. R.; Niyazov, R. A.; Qin, L. M.; Sabatié, F.; Tkachenko, S.; Weinstein, L. B.; Yun, J.; Zhang, J.; and CLAS Collaboration, "Measurement of Deeply Virtual Compton Scattering With a Polarized-Proton Target" (2006). Physics Faculty Publications. 339.
https://digitalcommons.odu.edu/physics_fac_pubs/339