Heavy quarkonium hybrids from Coulomb gauge QCD

TL;DR

This paper computes the spectrum of low-mass heavy quarkonium hybrid mesons using Coulomb gauge QCD, highlighting the influence of non-abelian interactions on their spin-parity structure.

Contribution

It introduces a non-relativistic Coulomb gauge QCD approach with mean field gluon treatment to analyze heavy hybrid mesons, providing new insights into their spectral ordering.

Findings

Gluon degrees of freedom are effectively modeled using mean field calibrated to gluelump data.

The non-abelian Coulomb interaction significantly affects the spin-parity level ordering.

The spectrum of low-mass heavy hybrid mesons is systematically computed.

Abstract

Using the non-relativisitc reduction of Coulomb gauge QCD we compute spectrum of the low mass hybrid mesons containing a heavy quark-antiquark pair. The gluon degrees of freedom are treated in the mean field approximation calibrated to the gluelump spectrum. We discuss the role of the non-abelian nature of the QCD Coulomb interaction in the ordering of the spin-parity levels.