Off-forward quark distributions of the nucleon in the large N_c limit

Details Off-forward quark distributions of the nucleon in the large N_c limit Off-forward quark distributions of the nucleon in the large N_c limit

1997-10-07

arxiv.org/abs/hep-ph/9710270v1

Phys.Rev. D57 (1998) 4325-4333

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 4 figures using epsf

Scientific paper

10.1103/PhysRevD.57.4325

We study the off-forward quark distributions (OFQD's) in the chiral quark-soliton model of the nucleon. This model is based on the large-N_c picture of the nucleon as a soliton of the effective chiral lagrangian and allows to calculate the leading twist quark- and antiquark distributions at a low normalization point. We demonstrate the consistency of the approach by checking various sum rules for the OFQD's. We present numerical estimates of the isosinglet distribution H(x,\xi,\Delta^2). In contrast to other approaches we find a strong qualitative dependence on the longitudinal momentum transfer, \xi. In particular, H(x,\xi,\Delta^2) as a function of x exhibits fast crossovers at |x| = \xi/2. Such behaviour could lead to a considerable enhancement of the deeply-virtual Compton scattering cross section.

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