Vector and axial-vector structures of the Theta^+
High Energy Physics - Phenomenology
2008-11-26 v3
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.
Keywords
Cite
@article{arxiv.0802.2368,
title = {Vector and axial-vector structures of the Theta^+},
author = {Hyun-Chul Kim and Tim Ledwig and Klaus Goeke},
journal= {arXiv preprint arXiv:0802.2368},
year = {2008}
}
Comments
5 pages. No figure. Final version. A talk presented at International Workshop Chiral07, Osaka, Japan, 13-16 Nov 2007