The mass of the charm quark from unquenched lattice QCD at fixed lattice spacing

Collaboration, UKQCD
Dougall, A
Maynard, CM
McNeile, C
UKQCD Collaboration

Publication date

September 2003

Abstract

We determine the mass of the charm quark ($m_c$) from lattice QCD with two flavors of dynamical quarks with a mass around the strange quark. We compare this to a determination in quenched QCD which has the same lattice spacing (0.1 fm). We investigate different formulations of the quark mass, based on the Vector Ward Identity, PCAC relation and the FNAL heavy quark formalism. Based on these preliminary results we find no effects due to sea quarks with a mass around strange