Exploring pion emission properties of (strange) hidden-charm molecular pentaquarks in a chiral quark model

TL;DR

This paper investigates how pion emission can reveal the internal structure of exotic pentaquarks, using a chiral quark model to calculate decay properties and guide experimental efforts.

Contribution

It introduces a method to probe pentaquark structures via pion emission calculations within a molecular framework, highlighting the decay width dependence on internal configurations.

Findings

Decay widths strongly depend on internal structure and wave functions.

Pion emission properties are sensitive probes for pentaquark internal configurations.

Results encourage experimental measurement of decay processes to identify pentaquark nature.

Abstract

The internal structure of the exotic $P_c$ and $P_{cs}$ pentaquarks remains an open question. To address this, we demonstrate that pion emission serves as a sensitive probe by calculating its properties within a molecular scenario using the chiral quark model and coupled-channel effects. Our results reveal a strong dependence of the decay widths on the internal structure and spatial wave functions. We therefore expect this study to stimulate experimental measurements of these decays, which are crucial for determining the nature of these states and guiding the search for further molecular partners.