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Heavy Baryons in a Pion Mean-Field Approach: A Brief Review

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Abstract

We review in this paper a series of recent works on properties of singly heavy baryons, based on a pion mean-field approach. In the limit of an infinitely heavy-quark mass, the heavy quark inside a heavy baryon can be regarded as a static color source. In this limit, a heavy baryon can be viewed as Nc − 1 valence quarks bound by the pion mean fields which are created self-consistently by the presence of the Nc valence quarks. We show that this mean-field approach can successfully describe the masses and the magnetic moments of the lowest-lying singly heavy baryons, using all the parameters fixed in the light-baryon sector except for the hyperfine spin-spin interactions. We also review a recent work on identifying the newly found excited Ωc baryons reported by the LHCb Collaboration. We discuss possible scenarios to identify them. Finally, we give a future perspective on this pion mean-field approach.

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Authors and Affiliations

  1. Department of Physics, Inha University, Incheon, 22212, Korea

    Hyun-Chul Kim

  2. School of Physics, Korea Institute for Advanced Study (KIAS), Seoul, 02455, Korea

    Hyun-Chul Kim

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  1. Hyun-Chul Kim
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Kim, HC. Heavy Baryons in a Pion Mean-Field Approach: A Brief Review. J. Korean Phys. Soc. 73, 165–178 (2018). https://doi.org/10.3938/jkps.73.165

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