Prediction of $P_{cc}$ states in quark model

TL;DR

This paper predicts new $qqc\bar{c}c$ pentaquark states using the quark delocalization color screening model, identifying three compact states and two molecular states with specific masses and quantum numbers, guiding future experiments.

Contribution

It introduces a novel application of the quark delocalization color screening model to predict specific $qqc\bar{c}c$ pentaquark states, including their masses and quantum numbers.

Findings

Three compact pentaquark states with specific masses and quantum numbers.

Two molecular states with predicted masses and configurations.

Predictions may assist future experimental searches for these states.

Abstract

Inspired by the observation of hidden-charm pentaquark $P_c$ and $P_{cs}$ states by the LHCb Collaboration, we explore the $qqc\bar{c}c$ ($q~=~u$ or $d$) pentaquark systems in the quark delocalization color screening model. The interaction between baryons and mesons and the influence of channel coupling are studied in this work. Three compact $qqc\bar{c}c$ pentaquark states are obtained, whose masses are 5259 MeV with $I(J^P)$ = $0(1/2^-)$, 5396 MeV with $I(J^P)$ = $1(1/2^-)$, and 5465 MeV with $I(J^P)$ = $1(3/2^-)$. Two molecular states are obtained, which are $I(J^P)$ = $0(1/2^-)$ $\Lambda_c J/\psi$ with 5367 MeV and $I(J^P)$ = $0(5/2^-)$ $\Xi_{cc}^* \bar{D}^*$ with 5690 MeV. These predicted states may provide important information for future experimental search.