Speaker
Description
In this talk, I review a series of recent works on the structure of singly heavy baryons in a pion mean-field approach or the chiral quark-soliton model. In the infinitely heavy-quark mass limit, a singly heavy baryon can be viewed as a bound state of the soliton with $N_c-1$ light valence quarks and a heavy quark as a static color source. The presence of the $N_c-1$ valence quarks produces the mean pion fields that interact with the valence quarks in a self-consistent manner. We perform a zero-mode quantization to get the collective Hamiltonian for the singly heavy baryons. Since the right hypercharge is constrained by the $N_c-1$ valence quarks, the flavor SU(3) irreducible representations of the baryon antitriplet and sextet appear naturally. Thus, the dynamics of the singly heavy baryons are governed by the light quarks. Considering the rotational $1/N_c$ and linear $m_s$ corrections, we investigate various properties of the singly heavy baryons such as the mass spectrum, magnetic moments, and axial charges. We also study the quark spin content of the singly heavy baryon.
