Deeply virtual compton scattering off the neutron.
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.
Mazouz
M
M
LPSC, Université Joseph Fourier, CNRS/IN2P3, INPG, F-38026 Grenoble, France.
Camsonne
A
A
Camacho
C Muñoz
CM
Ferdi
C
C
Gavalian
G
G
Kuchina
E
E
Amarian
M
M
Aniol
K A
KA
Beaumel
M
M
Benaoum
H
H
Bertin
P
P
Brossard
M
M
Chen
J-P
JP
Chudakov
E
E
Craver
B
B
Cusanno
F
F
de Jager
C W
CW
Deur
A
A
Feuerbach
R
R
Fieschi
J-M
JM
Frullani
S
S
Garçon
M
M
Garibaldi
F
F
Gayou
O
O
Gilman
R
R
Gomez
J
J
Gueye
P
P
Guichon
P A M
PA
Guillon
B
B
Hansen
O
O
Hayes
D
D
Higinbotham
D
D
Holmstrom
T
T
Hyde
C E
CE
Ibrahim
H
H
Igarashi
R
R
Jiang
X
X
Jo
H S
HS
Kaufman
L J
LJ
Kelleher
A
A
Kolarkar
A
A
Kumbartzki
G
G
Laveissiere
G
G
Lerose
J J
JJ
Lindgren
R
R
Liyanage
N
N
Lu
H-J
HJ
Margaziotis
D J
DJ
Meziani
Z-E
ZE
McCormick
K
K
Michaels
R
R
Michel
B
B
Moffit
B
B
Monaghan
P
P
Nanda
S
S
Nelyubin
V
V
Potokar
M
M
Qiang
Y
Y
Ransome
R D
RD
Réal
J-S
JS
Reitz
B
B
Roblin
Y
Y
Roche
J
J
Sabatié
F
F
Saha
A
A
Sirca
S
S
Slifer
K
K
Solvignon
P
P
Subedi
R
R
Sulkosky
V
V
Ulmer
P E
PE
Voutier
E
E
Wang
K
K
Weinstein
L B
LB
Wojtsekhowski
B
B
Zheng
X
X
Zhu
L
L