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arXiv · 2201.01791

Hyperons and $\Theta_s^+$ in Holographic QCD

Yizhuang Liu·Maciej A. Nowak·Ismail Zahed
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Abstract

We revisit the holographic description of strange baryons in the context of the Sakai-Sugimoto construction, by considering the strange quark mass as heavy. Hyperons are described by a massive $(K,K^*)$ multiplet, bound to a light-flavor instanton in bulk, much in the spirit of the Callan-Klebanov construction. The modular Hamiltonian maps onto the Landau problem, a charged particle in a 2-dimensional external magnetic field, induced by the bulk Chern-Simons interaction, plus spin-orbit coupling. The ensuing holographic hyperon spectrum compares fairly with the empirical one. The holographic strange pentaquark baryon $\Theta^+_s$ is shown to be unbound.

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Yizhuang Liu, Maciej A. Nowak, Ismail Zahed. 2022-01-05. Hyperons and $\Theta_s^+$ in Holographic QCD. https://doi.org/10.1103/physrevd.105.114021

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