Molecular pentaquarks composed of a ground octet baryon and a $P-$wave anti-charmed meson

TL;DR

This paper predicts possible molecular pentaquark states formed by an excited anti-charm meson and ground-state octet baryons using a comprehensive one-boson-exchange model, guiding future experimental searches.

Contribution

It introduces a systematic analysis of anti-charm molecular pentaquarks including $S$-wave and $P$-wave interactions, $S$-$D$ wave mixing, and coupled-channel effects, predicting a rich spectrum of states.

Findings

Predicts a spectrum of loosely bound anti-charm molecular pentaquarks with specific quantum numbers.

Provides mass range predictions to assist experimental searches at LHCb and Belle II.

Suggests these states could significantly expand the hadron spectrum.

Abstract

In this work, we investigate the interactions between an excited anti-charm meson doublet $(\bar{D}_1, \bar{D}_2^*)$ and ground-state octet baryons $(N, \Lambda, \Sigma, \Xi)$ with the aim of identifying possible molecular pentaquark states. A systematic analysis is performed within the one-boson-exchange model, which incorporates both $S$-wave and $P$-wave interactions, $S$-$D$ wave mixing, and coupled-channel effects. By solving the Schr\"{o}dinger equations, we can predict a rich spectrum of loosely bound anti-charm molecular pentaquarks with strangeness $|S| = 0, 1, 2$. Our results provide specific quantum number assignments and mass range predictions to guide future experimental searches at facilities such as LHCb and Belle II. The discovery of such states would significantly enrich the hadron spectrum and serve as a critical test of theoretical models for hadronic interactions.