PRELIMINARY RESULTS FOR LIGHT HADRON MASSES FROM LATTICE QCD ON ASYMMETRIC LATTICES

摘要

Preliminary results for light hadron masses are presented from lattice QCD calculations on asymmetric lattices with improved actions. The used lattices have a fixed spatial lattice spacing a_s at 0.4fm, and a temporal lattice spacing at from 0.14 to 0.08fm. The discretization errors of a_s is reduced through improving actions at certain level. We find that masses of mesons have a weak a_t dependence, while the a_t dependence for baryons is more significant. Extrapolating to a_t = 0 limit, we obtain the mass of the nucleon, which has a 9% difference compared with the experimental value.