Mass spectrum of 1-+ exotic mesons from lattice QCD

TL;DR

This study uses lattice QCD and Bayesian analysis to identify multiple spectral levels of exotic mesons with JPC=1-+, potentially linking them to known experimental states and a higher mass state.

Contribution

It presents the first lattice QCD spectral analysis of 1-+ exotic mesons using Bayesian methods, revealing five spectral levels.

Findings

Five spectral levels identified in lattice QCD

Possible connection to pi1(1400) and pi1(1600) states

Indication of a higher mass state around 2 GeV

Abstract

Time correlation functions of a hybrid exotic meson operator, with JPC=1-+, generated in quenched lattice QCD are subjected to a (Bayesian) maximum entropy analysis. Five distinct spectral levels are uncovered. Their extrapolation into the physical pion mass region suggests a possible relationship to experimentally known states pi1(1400) and pi1(1600), and also to a state in the 2 GeV region carrying the same quantum numbers.