New narrow LHCb pentaquarks as lowest antiquark-diquark-diquark systems

TL;DR

This paper models LHCb's hidden charm pentaquarks as lowest antiquark-diquark-diquark systems, providing a classification scheme and analyzing their mass splittings based on recent experimental data.

Contribution

It introduces a novel classification of pentaquark states as lowest S-wave antiquark-diquark-diquark systems and discusses their mass splitting scheme in light of LHCb data.

Findings

Identification of pentaquark states as lowest S-wave multiplet

Mass splitting scheme for hidden charm pentaquarks

Classification and recombination channels for LHCb pentaquarks

Abstract

The antiquark-diquark-diquark model describes pentaquark states both in terms of quarks and hadrons. We discuss pentaquark states with hidden charm $P(\bar c cuud)$ discovered in the $J/\Psi p$ spectrum by the LHCb collaboration. We consider three pentaquark states as members of the lowest ($S$-wave) multiplet and discuss the mass splitting scheme. The latest LHCb data for pentaquarks with hidden charm provide an opportunity to make an assumption about the diquark content of the pentaquark states. We give a classification for the LHCb pentaquarks and define recombination channels for these states.