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Deeply virtual compton scattering off the neutron.

Authors :
Mazouz M
Camsonne A
Camacho CM
Ferdi C
Gavalian G
Kuchina E
Amarian M
Aniol KA
Beaumel M
Benaoum H
Bertin P
Brossard M
Chen JP
Chudakov E
Craver B
Cusanno F
de Jager CW
Deur A
Feuerbach R
Fieschi JM
Frullani S
Garçon M
Garibaldi F
Gayou O
Gilman R
Gomez J
Gueye P
Guichon PA
Guillon B
Hansen O
Hayes D
Higinbotham D
Holmstrom T
Hyde CE
Ibrahim H
Igarashi R
Jiang X
Jo HS
Kaufman LJ
Kelleher A
Kolarkar A
Kumbartzki G
Laveissiere G
Lerose JJ
Lindgren R
Liyanage N
Lu HJ
Margaziotis DJ
Meziani ZE
McCormick K
Michaels R
Michel B
Moffit B
Monaghan P
Nanda S
Nelyubin V
Potokar M
Qiang Y
Ransome RD
Réal JS
Reitz B
Roblin Y
Roche J
Sabatié F
Saha A
Sirca S
Slifer K
Solvignon P
Subedi R
Sulkosky V
Ulmer PE
Voutier E
Wang K
Weinstein LB
Wojtsekhowski B
Zheng X
Zhu L
Source :
Physical review letters [Phys Rev Lett] 2007 Dec 14; Vol. 99 (24), pp. 242501. Date of Electronic Publication: 2007 Dec 10.
Publication Year :
2007

Abstract

The present experiment exploits the interference between the deeply virtual Compton scattering (DVCS) and the Bethe-Heitler processes to extract the imaginary part of DVCS amplitudes on the neutron and on the deuteron from the helicity-dependent D(e,e'gamma)X cross section measured at Q2=1.9 GeV2 and xB=0.36. We extract a linear combination of generalized parton distributions (GPDs) particularly sensitive to E_{q}, the least constrained GPD. A model dependent constraint on the contribution of the up and down quarks to the nucleon spin is deduced.

Details

Language :
English
ISSN :
0031-9007
Volume :
99
Issue :
24
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
18233443
Full Text :
https://doi.org/10.1103/PhysRevLett.99.242501