Deeply virtual compton scattering off the neutron

作者：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

来源：Physical Review Letters, 2007, 99(24): 242501.

DOI：10.1103/PhysRevLett.99.242501

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) over right arrow ,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.

• 出版日期2007-12-14
• 单位中国地震局; 中国科学技术大学; Saskatoon; rutgers