Deeply Virtual Compton Scattering off the neutron

Journal Article · Sat Dec 01 00:00:00 EST 2007 · Phys.Rev.Lett

DOI:https://doi.org/10.1103/PhysRevLett.99.242501· OSTI ID:914441

Mazouz, M; Camsonne, A; Camacho, C Munoz; Ferdi, C; Gavalian, G; Kuchina, E; Amarian, M; Aniol, K A; Beaumel, M; Benaoum, H; Bertin, P; Brossard, M; Chen, J -P; Chudakov, E; Craver, B; Cusanno, F; de Jager, C W; Deur, A; Feuerbach, R; Fieschi, J -M ; Frullani, S; Garcon, M; Garibaldi, F; Gayou, O; Gilman, R; Gomez, J; Gueye, P; Guichon, P A.M.; Guillon, B; Hansen, O; Hayes, D; Higinbotham, D; Holmstrom, T; Hyde, C E; Ibrahim, H; Igarashi, R; Jiang, X; Jo, H S; Kaufman, L J; Kelleher, A; Kolarkar, A; Kumbartzki, G; Laveissiere, G; LeRose, J J; Lindgren, R; Liyanage, N; Lu, H -J; Margaziotis, D J; Meziani, Z -E; McCormick, K; Michaels, R; Michel, B; Moffit, B; Monaghan, P; Nanda, S; Nelyubin, V; Potokar, M; Qiang, Y; Ransome, R D; Real, J -S; Reitz, B; Roblin, Y; Roche, J; Sabatie, F; Saha, A; Sirca, S; Slifer, K; Solvignon, P; Subedi, R; Sulkosky, V; Ulmer, P E; Voutier, E; Wang, K; Weinstein, L B; Wojtsekhowski, B; Zheng, X; Zhu, L

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$$({\vec e},e'\gamma)X$$ cross section measured at $Q^2$=1.9 GeV$^2$ and $$x_B$$=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.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE - Office of Energy Research (ER)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 914441
• Report Number(s): JLAB-PHY-07-707; DOE/OR/23177-0131; arXiv:0709.0450; TRN: US0802880
• Journal Information: Phys.Rev.Lett, Vol. 99
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
COMPTON EFFECT
CROSS SECTIONS
DEUTERONS
NEUTRONS
NUCLEONS
QUARKS
SPIN