Decay of Theta+ in a quark model

Details Decay of Theta+ in a quark model Decay of Theta+ in a quark model

2004-09-09

arxiv.org/abs/hep-ph/0409102v2

Phys.Rev. D71 (2005) 074021

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.71.074021

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.

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