Axial-vector transition form factors of the baryon octet to the baryon decuplet with flavor SU(3) symmetry breaking

TL;DR

This paper calculates axial-vector transition form factors between baryon octet and decuplet states using a chiral quark-soliton model, including SU(3) symmetry breaking, and compares results with experimental and lattice QCD data.

Contribution

It introduces a detailed calculation of axial-vector transition form factors with SU(3) symmetry breaking effects within the chiral quark-soliton model, including rotational corrections.

Findings

Results agree with T2K data

Calculated form factor C_5^A at Q^2=0

Extracted axial-vector mass M_A

Abstract

We investigate the axial-vector transition form factors of the baryon octet to the baryon decuplet within the framework of the chiral quark-soliton model, with the effects of flavor SU(3) symmetry breaking included. We consider the rotational $1/N_c$ corrections and regard the strange current quark mass as a perturbation. We compare the present results for the $\Delta \to N$ axial-vector transition with those from other models and lattice QCD. We also compute all possible axial-vector transitions from the baryon decuplet to the octet with the strangeness changed, i.e., $|\Delta S|=1$. We obtain the value of the essential form factor $C_5^A$ for the $\Delta\to N$ axial-vector transition at the zero momentum transfer ($Q^2=0$). Furthermore, the present results are in good agreement with those fitted with the T2K data. We extract the value of the axial-vector mass $M_A$ compared to the data.