Decay of Theta+ in a quark model
High Energy Physics - Phenomenology
2009-11-10 v2
Abstract
We study the decay of Theta+ in a non-relativistic quark model. The wave function of Theta+ is constructed for the two cases JP = 1/2+- as products of color, spin, flavor and orbital parts respecting total antisymmetrization among the four quarks. We find that for the negative parity Theta+ the width becomes very large which is of order of several hundreds MeV, while it is about a several tens MeV for the positive parity. By assuming additionally diquark correlations, the width is reduced to be of order 10 MeV. It is also pointed out that a similar calculation for 3/2- results in strong suppression of its width.
Cite
@article{arxiv.hep-ph/0409102,
title = {Decay of Theta+ in a quark model},
author = {A. Hosaka and M. Oka and T. Shinozaki},
journal= {arXiv preprint arXiv:hep-ph/0409102},
year = {2009}
}
Comments
14 pages, to appear in Phys. Rev. D