Diquark and triquark correlations in the deconfined phase of QCD

TL;DR

This paper investigates the stability of diquark and triquark bound states in the quark-gluon plasma phase of QCD, revealing their survival temperatures and properties using a non-perturbative potential approach.

Contribution

It introduces a non-perturbative potential method to estimate binding energies and melting temperatures of diquark and triquark states in finite-temperature QCD.

Findings

J/ψ and ccc states survive up to ~1.3 T_c

Bottomonium states survive up to ~2.2 T_c

Provides estimates of radii and melting temperatures for bound states

Abstract

We use the non-perturbative Q\bar Q potential at finite temperatures derived in the Field Correlator Method to obtain binding energies for the lowest eigenstates in the Q\bar Q and QQQ systems (Q=c,b). The three--quark problem is solved by the hyperspherical method. The solution provides an estimate of the melting temperature and the radii for the different diquark and triquark bound states. In particular we find that J/\psi and $ccc$ ground states survive up to T \sim 1.3 T_c, where T_c is the critical temperature, while the corresponding bottomonium states survive even up to higher temperature, T \sim 2.2 T_c.