Vector and axial-vector structures of the Theta^+

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.

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

References in corpus (12)

• Evidence for Narrow S=+1 Baryon Resonance in Photo-production from Neutron
• Exotic Anti-Decuplet of Baryons: Prediction from Chiral Solitons
• Experimental Search for Pentaquarks
• Search for the ${\Theta }^{+}$ pentaquark in the reaction $\gamma d\to p{K}^{-}{K}^{+}n$
• Search for the ${\Theta }^{+}$ pentaquark in the reactions $\gamma p\to {\bar{K}}^0{K}^{+}n$ and $\gamma p\to {\bar{K}}^0{K}^{0}p$
• Exotic Theta^+ baryon production induced by a photon and a pion
• Further evidence for formation of a narrow baryon resonance with positive strangeness in K+ collisions with Xe nuclei
• Search for the Theta+ pentaquark in the gamma d -> Lambda n K+ reaction measured with CLAS
• Axial-vector form factors of the nucleon within the chiral quark-soliton model and their strange components
• Pentaquarks: Review on Models and Solitonic Calculations of Antidecuplet Magnetic Moments
• Photoproduction of the Theta^+ resonance on the nucleon in a Regge model
• K*-couplings for the antidecuplet excitation

Cited by in corpus (1)

• Formation of a narrow baryon resonance with positive strangeness in K^+ collisions with Xe nuclei