Properties of charmonium in lattice QCD with 2+1 flavors of improved staggered sea quarks
arXiv:hep-lat/0310042 · doi:10.1016/S0920-5632(03)02575-1
Abstract
We use the dynamical gluon configurations provided by the MILC collaboration in a study of the charmonium spectrum and psi leptonic width. We examine sea quark effects on mass splitting and on the leptonic decay matrix element for light masses as low as m_s/5, while keeping the strange quark mass fixed and the lattice spacing nearly constant.
Lattice2003(heavy)