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Decay of Theta+ in a quark model

A. Hosaka·M. Oka·T. Shinozaki
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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.

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A. Hosaka, M. Oka, T. Shinozaki. 2005-04-09. Decay of Theta+ in a quark model. https://doi.org/10.1103/physrevd.71.074021

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