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

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.

Comments: 22 pages, 4 figures. Final version accepted for publication in Physical Review D