Vector and axial-vector structures of the Theta^+

Details Vector and axial-vector structures of the Theta^+ Vector and axial-vector structures of the Theta^+

2008-02-17

arxiv.org/abs/0802.2368v3

Mod.Phys.Lett.A23:2238-2241,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages. No figure. Final version. A talk presented at International Workshop Chiral07, Osaka, Japan, 13-16 Nov 2007

Scientific paper

10.1142/S0217732308029101

We present in this talk recent results of the vector and axial-vector transitions of the nucleon to the pentaquark baryon Theta^{+}, based on the SU(3) chiral quark-soliton model. The results are summarized as follows: K^{*}-N-Theta vector and tensor coupling constants turn out to be g_{K^{*}N Theta} = 0.81 and f_{K^{*}N Theta}=0.84, respectively, and the KN Theta axial-vector coupling constant to be g_{A}^* = 0.05. As a result, the total decay width for Theta^+ to NK becomes very small: Gamma_{Theta -> NK} = 0.71 MeV, which is consistent with the DIANA result Gamma_{Theta -> NK}=0.36 +- 0.11 MeV.

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