Charmonium spectroscopy from an anisotropic lattice study

TL;DR

This study uses anisotropic lattice QCD with a large operator basis to analyze the charmonium spectrum, including excited and hybrid states, providing detailed insights into their quantum numbers and disconnected contributions.

Contribution

It introduces a comprehensive anisotropic lattice approach with an extensive operator basis to explore excited and hybrid charmonium states in full QCD.

Findings

Detailed spectrum of excited charmonium states obtained

Identification of hybrid states with exotic and non-exotic quantum numbers

Preliminary results on disconnected contributions to ηc

Abstract

We present a progress report on our study of the charmonium spectrum in full QCD on anisotropic lattices generated by the Hadron Spectrum Collaboration. We adopt a large basis of interpolating operators to extract the excited charmonium states using the variational method. A detailed spectrum of excited charmonium mesons in many $J^{PC}$ channels is obtained. Hybrid states with exotic and non-exotic quantum numbers are determined and preliminary results from a study of disconnected contributions to the $\eta_c$ are presented.