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Molecular charmed baryons and pentaquarks from light-meson exchange saturation

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arxiv 2304.14855 v2 pith:MFJXLSJC submitted 2023-04-28 hep-ph hep-exhep-latnucl-th

Mao-Jun Yan , Fang-Zheng Peng , Manuel Pavon Valderrama This is my paper · ORCID
classification hep-phhep-exhep-latnucl-th
keywords baryonscharmedcompositelight-mesonomegapentaquarksspectrumstates
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The spectrum of the $c qq$ baryons contains a few states whose nature is not clearly a three-quark composite and which might have a sizable baryon-meson component. Examples include the $\Sigma_c(2800)$ or the $\Lambda_c(2940)$. Here we explore the spectrum of two-body systems composed of a light, octet baryon and a charmed meson (or antimeson) within a simple contact-range theory in which the couplings are saturated by light-meson exchanges. This results in the prediction of a series of composite anticharmed pentaquarks ($\bar{c} q qqq $) and singly-charmed baryons ($c \bar{q} qqq $). Among the later we find $J=\tfrac{1}{2}$ $\Xi D$ and $J=\tfrac{3}{2}$ $\Xi D^*$ bound states with masses matching those of the recently observed $\Omega_c(3185)$ and $\Omega_c(3327)$ baryons.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach

    hep-ph 2025-08 reject novelty 6.0 of 10

    A model calculation predicts fourteen double-heavy molecular pentaquark states, but their existence and binding energies depend critically on an unconstrained regularization parameter.

  2. Final state interaction in the $\Lambda_b\to D^+D^- \Lambda,~D^0D_s^- p,~D_s^+D_s^-\Lambda$ reactions

    hep-ph 2025-07 conditional novelty 5.0 of 10

    Threshold enhancements in the Ds-p, Ds-Lambda, and related mass distributions of Lambda_b decays are predicted from final state interactions with molecular exotic states.

  3. Exotic multistrange-anticharm baryon systems

    hep-ph 2025-06 conditional novelty 4.0 of 10

    Anticharmed meson plus strange baryon systems are predicted to form bound molecules at S=-1 and S=-2, but not at S=-3 or S=-4.

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