Photoproduction of hidden charm pentaquark states $P_c^+(4380)$ and $P_c^+(4450)$

TL;DR

This paper proposes studying the pentaquark candidates $P_c^+(4380)$ and $P_c^+(4450)$ through $J/ar{J}$ photoproduction to confirm their genuine nature and gather experimental evidence for their existence.

Contribution

It introduces a method to verify the authenticity of pentaquark states using photoproduction, avoiding false signals caused by anomalous triangle singularities.

Findings

Photoproduction can confirm the genuine nature of pentaquark states.

Absence of anomalous triangle singularities supports their existence.

Provides a new experimental approach for pentaquark verification.

Abstract

We propose to study the pentaquark candidates of $P_c^+(4380)$ and $P_c^+(4450)$ in $J/\psi$ photoproduction and look for further experimental evidence for their nature. Since the photoproduction process does not satisfy the so-called "anomalous triangle singularity" condition their presence in $J/\psi$ photoproduction would conclude that they should be genuine states and provide further evidence for their existence.