Strange pentaquarks and excited $\Xi$ hyperons in $\Xi_b^- \to J/\psi \Lambda K^-$ final states

TL;DR

This paper discusses recent experimental evidence for new pentaquark states and excited hyperons observed in specific baryon decay channels, providing insights into exotic hadron spectroscopy.

Contribution

It offers a theoretical interpretation of the LHCb findings, proposing possible structures for the observed pentaquarks and hyperons in $ ext{Ξ}_b^-$ decays.

Findings

Evidence for structures in $J/\psi \Lambda$ final states

Identification of potential pentaquark states

Insights into hyperon excitations

Abstract

We comment on the recent evidence by the LHCb Collaboration for a structure in the $J/\psi \Lambda$ final state produced in the decay $\Xi^-_b \to J/\psi \Lambda K^-$, with minimal quark content $c \bar c u d s$.