Heavy baryons in holographic QCD with higher dimensional degrees of freedom

Abstract

We try to introduce heavy flavors to Sakai-Sugimoto model by regarding higher dimensional components of gauge fields as heavy mesons. Using the Forgács and Manton approach, we obtain a theory composed of heavy mesons and the instanton of light flavors. Applying the collective coordinate quantization method, we derived a mass formula of heavy baryons. In the leading order of $1/m_H$ expansion ($m_H$ the mass of a heavy quark), we find singlet and doublet states in the heavy quark symmetry (HQS). Also, we obtain the degenerate Roper like and odd parity excitations. By virtue of heavy meson degrees of freedom, our mass formula reproduces the mass ordering of ${\Sigma }_c^{\ast }$ and ${\Lambda }_c^{\ast }$ correctly.

Comments: 9 pages, 2 tables