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arXiv · 2304.14855

Molecular charmed baryons and pentaquarks from light-meson exchange saturation

Mao-Jun Yan·Fang-Zheng Peng·Manuel Pavon Valderrama
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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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Mao-Jun Yan, Fang-Zheng Peng, Manuel Pavon Valderrama. 2023-04-28. Molecular charmed baryons and pentaquarks from light-meson exchange saturation. https://doi.org/10.1103/physrevd.109.014023

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