Ratios of Hidden-Charm Compact Pentaquark Decay Widths in Quark-Diquark Model

TL;DR

This paper models hidden-charm pentaquarks as compact diquark-diquark-antiquark systems, analyzing decay mode ratios to understand their structure and decay behaviors based on recent LHCb observations.

Contribution

It introduces a diquark-diquark-antiquark model for hidden-charm pentaquarks and calculates decay mode ratios, providing new insights into their internal structure.

Findings

Ratios of decay widths for charmonium and open-charm modes are derived.

The model explains the narrow widths of observed pentaquark resonances.

Results are consistent with LHCb experimental data.

Abstract

A number of resonances comparable with a hypothesis of hidden-charm pentaquark is observed by the LHCb Collaboration. We interpret these narrow resonances as compact hidden-charm diquark-diquark-antiquark systems. Within this assumption, an interplay between the charmonium and open-charm modes is considered. Ratios of such modes for non-strange pentaquarks are obtained and discussed.