Charmonium spectroscopy with heavy Kogut-Susskind quarks

TL;DR

This paper investigates charmonium spectroscopy using heavy Kogut-Susskind quarks in quenched and full QCD, providing mass splittings and coupling constant estimates while discussing related systematic effects.

Contribution

It presents new results on charmonium states with heavy Kogut-Susskind quarks in both quenched and full QCD, including mass splittings and coupling constants.

Findings

1P--1S mass splitting results

Estimate of α_s(M_Z) in QCD

Discussion of flavor and finite size effects

Abstract

Charmonium spectroscopy with Kogut-Susskind valence quarks are carried out for quenched QCD at $\beta=6.0$ and for two-flavor full QCD at $\beta=5.7$. Results for 1P--1S mass splitting and estimates of $\alpha^{(5)}_{\overline{MS}}(m_Z)$ are reported. Problems associated with flavor breaking effects and finite size effects of $1P$ states are discussed.