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Investigation of ΛQ and ΞQ baryons in the heavy quark-light diquark picture

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Abstract

We apply a new mass formula which is derived analytically in the relativistic flux tube model to the mass spectra of Λ Q and Ξ Q (Q = c or b quark) baryons. To this end, the heavy quark-light diquark picture is employed. We find that all masses of the available Λ Q and Ξ Q states can be understood well. The assignments to these states do not appear to contradict the strong decay properties. Λ c (2760)+ and Ξ c (2980) are assigned to the first radial excitations with J P = 1/2+. Λ c (2940)+ and Ξ c (3123) might be the 2P states. The Λ c (2880)+ and Ξ c(3080) are the good 1D candidates with J P = 5/2+. Λ c (3055) is likely to be a 1D state with J P=3/2+. Λ b (5912)0 and Λ b (5920)0 favor the 1P assignments with J P = 1/2− and 3/2−, respectively. We propose a search for the \(\tilde \Lambda _{c2} (5/2^ - )\) state which can help to distinguish the diquark and three-body schemes.

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Authors and Affiliations

  1. Department of Physics, Anyang Normal University, 455000, Anyang, China

    Bing Chen & Ke-Wei Wei

  2. Department of Physics, Shanghai University, 200444, Shanghai, China

    Ailin Zhang

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  1. Bing Chen
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  2. Ke-Wei Wei
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  3. Ailin Zhang
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Correspondence to Bing Chen.

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Communicated by Shi-Lin Zhu

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Chen, B., Wei, KW. & Zhang, A. Investigation of ΛQ and ΞQ baryons in the heavy quark-light diquark picture. Eur. Phys. J. A 51, 82 (2015). https://doi.org/10.1140/epja/i2015-15082-3

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  • DOI: https://doi.org/10.1140/epja/i2015-15082-3

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