Structure and decays of hidden heavy pentaquarks

TL;DR

This paper investigates the structure and decay properties of hidden heavy pentaquarks, proposing a molecular model for these exotic states and predicting their flavor partners in charm and bottom sectors.

Contribution

It introduces a hadronic molecular framework for hidden heavy pentaquarks, extending classification to bottom sector and analyzing decay modes using phenomenological Lagrangians.

Findings

Predicted flavor partners of observed pentaquarks in charm and bottom sectors.

Constructed baryon-meson bound states using Weinberg-Salam compositeness condition.

Analyzed strong decay channels into light baryons and vector or pseudoscalar mesons.

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.