Axial-vector transitions and strong decays of the baryon antidecuplet in the self-consistent SU(3) chiral quark-soliton model

TL;DR

This paper calculates axial-vector transition constants of baryon antidecuplet to octet and decuplet within a chiral quark-soliton model, highlighting the importance of strange quark mass corrections for decay predictions.

Contribution

It provides a self-consistent SU(3) chiral quark-soliton model analysis including rotational and strange quark mass corrections for baryon transitions.

Findings

Decay width of Theta+ to NK is 0.71 MeV.

Strange quark mass corrections are crucial for axial-vector constants.

Leading-order contributions are nearly canceled by rotational 1/N_c corrections.

Abstract

We investigate the axial-vector transition constants of the baryon antidecuplet to the octet and decuplet within the framework of the self-consistent SU(3) chiral quark-soliton model. Taking into account rotational 1/N_c and linear m_s corrections and using the symmetry-conserving quantization, we calculate the axial-vector transition constants. It is found that the leading-order contributions are generally almost canceled by the rotational 1/N_c corrections. Thus, the m_s corrections turn out to be essential contributions to the axial-vector constants. The decay width of the Theta^+ to NK transition is determined to be Gamma(Theta -> NK)=0.71, MeV, based on the result of the axial-vector transition constant g_A^* (Theta -> NK)=0.05. In addition, other strong decays of the baryon antidecuplet are investigated.