Abstract
We study the hadronic molecular structure of hidden heavy pentaquarks - new exotic states composed of charmed/bottom baryons and $D(D^*)/B(B^*)$ mesons. Based on the observation of three pentaquark candidates $P_c^+(4312)$, $P_c^+(4440)$, and $P_c^+(4457)$ by the LHCb Collaboration we consider the classification of possible flavor partners composed of charmed baryons and $D(D^*)$ mesons within the hadronic molecular approach. We extend this classification to the bottom sector. Using phenomenological Lagrangians we construct baryon-meson bound states governed by the Weinberg-Salam compositeness condition. As an application we consider strong two-body decays of the new exotic states into a light baryon and $V=J/\psi,\Upsilon$ or $P=\eta_c,\eta_b$ mesons. Results are presented in the heavy quark limit.
Highlights
In 2015 the LHCb Collaboration reported on the observation of resonances in the J=ψp decay channel consistent with possible pentaquark states in the full reaction Λ0b → J=ψK−p decay [1]
We study the hadronic molecular structure of hidden heavy pentaquarks—new exotic states composed of charmed/bottom baryons and DðDÃÞ=BðBÃÞ mesons
Based on the observation of three pentaquark candidates Pþc ð4312Þ, Pþc ð4440Þ, and Pþc ð4457Þ by the LHCb Collaboration we consider the classification of possible flavor partners composed of charmed baryons and DðDÃÞ mesons within the hadronic molecular approach
Summary
We study the hadronic molecular structure of hidden heavy pentaquarks—new exotic states composed of charmed/bottom baryons and DðDÃÞ=BðBÃÞ mesons. Based on the observation of three pentaquark candidates Pþc ð4312Þ, Pþc ð4440Þ, and Pþc ð4457Þ by the LHCb Collaboration we consider the classification of possible flavor partners composed of charmed baryons and DðDÃÞ mesons within the hadronic molecular approach. We extend this classification to the bottom sector. As an application we consider strong two-body decays of the new exotic states into a light baryon and V 1⁄4 J=ψ; Υ or P 1⁄4 ηc; ηb mesons.
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