The Axial-vector transitions between the singly heavy baryons within a mean-field approach

초록

A chiral quark-soliton model (CQSM) is a relativistic pion mean-field approach in the large Nc limit, which describes baryon as a bound state of the Nc valence quarks by the pion mean field. In the infinitely heavy mass limit of the heavy quark, a singly heavy baryon can be viewed as an Nc ? 1 chiral soliton with the heavy quark as a static color source. In this framework, we evaluate the axial-vector transition form factors of the low-lying singly charmed baryons. The 1/Nc rotational corrections and the effects of flavor SU(3) symmetry breaking were taken into account. We investigate the contributions from the valence and sea quarks to the axial-vector transition form factors and, the valence-quark contributions are dominant in all transition processes. Moreover, we find that the effects of flavor SU(3) symmetry breaking are marginal in general.