Deeply Virtual Compton Scattering off the Neutron

Journal Article · Fri Dec 14 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.242501· OSTI ID:21024565

Mazouz, M; Guillon, B; Real, J -S; Voutier, E ^[1]; Camsonne, A; Ferdi, C; Brossard, M; Fieschi, J -M; Laveissiere, G; Michel, B ^[2]; Camacho, C Munoz; Beaumel, M; Garcon, M; Guichon, P A. M.; Sabatie, F ^[3]; Gavalian, G; Amarian, M; Hayes, D; Ibrahim, H; Ulmer, P E ^[4]

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1. LPSC, Universite Joseph Fourier, CNRS/IN2P3, INPG, F-38026 Grenoble (France)
2. LPC Clermont-Ferrand, Universite Blaise Pascal, CNRS/IN2P3, F-63177 Aubiere (France)
3. CEA Saclay, DAPNIA/SPhN, F-91191 Gif-sur-Yvette (France)
4. Old Dominion University, Norfolk, Virginia 23508 (United States)

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-vector,e{sup '}{gamma})X cross section measured at Q{sup 2}=1.9 GeV{sup 2} and x{sub B}=0.36. We extract a linear combination of generalized parton distributions (GPDs) particularly sensitive to E{sub q}, the least constrained GPD. A model dependent constraint on the contribution of the up and down quarks to the nucleon spin is deduced.

• OSTI ID: 21024565
• Journal Information: Physical Review Letters, Vol. 99, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.99.242501; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA). Jefferson Lab Hall A Collaboration; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPTON EFFECT
CROSS SECTIONS
D QUARKS
DEUTERONS
HELICITY
NEUTRONS
SPIN
U QUARKS