arXiv:hep-ph/9512351·v1·High Energy Physics — Phenomenology

Nucleon Tensor Charges in the Chiral Quark--Soliton Model

Hyun-Chul Kim · M.V. Polyakov · K. Goeke

Abstract

We investigate the singlet $g_{T}^{(0)}$ and isovector $g_{T}^{(3)}$ tensor charges of the nucleon, which are deeply related to the first moment of the leading twist transversity quark distribution $h_{1} (x)$ , in the chiral quark-soliton model. With rotational $O (1/ N_{c})$ corrections taken into account, we obtain $g_{T}^{(0)} = 0.69$ and $g_{T}^{(3)} = 1.45$ at a low normalization poin of several hundreds MeV. Within the same approximation and parameters the model yields $g_{A}^{(0)} = 0.36$ , $g_{A}^{(3)} = 1.21$ for axial charges and correct octet--decuplet mass splitting. We show how the chiral quark-soliton model interpolates between the nonrelativistic quark model and the Skyrme model.

Comments: 4 pages with 1 figure Talk given at 7th International Conference on the Structure of Baryons, Santa Fe, New Mexico, 3-7 Oct 1995