Spectroscopic Analysis of Fully Heavy Pentaquarks

TL;DR

This paper investigates the theoretical existence, classification, and properties of fully heavy pentaquark states, inspired by recent discoveries of fully heavy tetraquarks, aiming to guide future experimental searches.

Contribution

It systematically analyzes the mass spectrum and magnetic moments of all possible low-lying fully heavy pentaquark states using Young-tableau classification and effective models.

Findings

Mass spectrum predictions for various quantum numbers.

Magnetic moment calculations for candidate states.

Comparison with existing theoretical models.

Abstract

Motivated by the discovery of the fully charmed tetraquark state $X(6900)$ in the invariant mass spectrum of $J/\psi$ pairs by the LHCb collaboration, this study explores the potential existence of fully heavy pentaquark states. We systematically investigate the low-lying s-wave fully heavy pentaquark states across all possible configurations. The classification of these states is performed using the Young-Yamounachi bases through the Young-tableau technique. We analyze the mass spectrum and magnetic moments of pentaquarks with quantum numbers $J^P$= $\frac{1}{2}^{\pm}$,$\frac{3}{2}^{\pm}$ and $\frac{5}{2}^{\pm}$ utilizing effective mass and screened charge schemes. Our findings are compared with various theoretical models, providing valuable insights for future experimental studies.