Production of hidden-charm strange pentaquarks $P_{cs}$ from the $K^- \,p \to J/\psi \,\Lambda$ reaction

TL;DR

This paper explores the production mechanisms of hidden-charm strange pentaquarks in the $K^- p o J/ar{ ext{}}\psi \Lambda$ reaction using effective Lagrangian and Regge models, providing theoretical predictions for future experimental searches.

Contribution

It introduces a combined theoretical analysis of $P_{cs}$ production using two frameworks, offering detailed cross section calculations and spin-parity considerations.

Findings

Calculated total and differential cross sections for the reaction.

Analyzed contributions of $P_{cs}$ with different spin-parity assignments.

Provided theoretical guidance for future experimental detection.

Abstract

We investigate the production of the hidden-charm pentaquark $P_{cs}^0(4459)$ with strangeness in the $K^- p \to J/\psi \Lambda$ reaction, employing two different theoretical frameworks, i.e., the effective Lagrangian method and the Regge approach. Having determined all relevant coupling constants, we are able to compute the total and differential cross sections for the $K^- p \to J/\psi \Lambda$ reaction. We examine the contributions of $P_{cs}$ with different sets of spin-parity quantum number assigned. The present results may give a guide for possible future experiments.