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arXiv · 0802.2368

Vector and axial-vector structures of the Theta^+

Hyun-Chul Kim·Tim Ledwig·Klaus Goeke
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Abstract

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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Hyun-Chul Kim, Tim Ledwig, Klaus Goeke. 2008-05-09. Vector and axial-vector structures of the Theta^+. https://doi.org/10.1142/s0217732308029101

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