Decay of Theta+ in a quark model

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.

arXiv comment14 pages, to appear in Phys. Rev. D

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Cited by in corpus (18)

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• Are There Diquarks in the Nucleon?
• Suppression of Theta^+(J^P=3/2^(+,-)) photoproduction from the proton
• Spin 3/2 Penta-quarks in anisotropic lattice QCD
• Pentaquark as a NK^* bound state with TJ^P=0{3/2}^-
• Fall-apart decays of polyquark hadrons
• Phenomenological study of two-meson couplings of Theta+
• Spin-3/2 Pentaquark in QCD Sum Rules
• Possible quantum numbers of the pentaquark Θ^+(1540) in QCD sum rules
• Dynamics of Multiquark Systems: Mass, Width and Exotics
• Structure and decay width of Θ^+ in a one-gluon exchange model
• Pentaquark Theta^+ production via gamma N ->K^*bar Theta^+(3/2^(+-))
• P-wave Pentaquark and its Decay in the Quark Model with Instanton Induced Interaction
• Pentaquarks: Theory overview, and some more about quark models
• Spectroscopy of Pentaquark Baryons