The Mass Spectrum of Light and Heavy Hadrons from Improved Lattice Actions

Abstract

We use improved lattice actions for glue, light quarks and heavy quarks for which we use lattice NRQCD to compute hadron masses. Our results are in good agreement with experiment, except for charmed hadrons. It seems that charmed quar ks are not well approximated as heavy quarks nor as light quarks.

Comments: 14 pages +6 pages figures, plain-tex file