Light Hadron Masses from Lattice Quantum Chromodynamics on Asymmetric Lattices with Improved Actions

We simulate lattice quantum chromodynamics on asymmetric lattices with improved actions, where quenching approximation is used. These lattices have a spatial lattice spacing a_s at 0.3 and 0.4fm, and a temporal lattice spacing a_t from 0.14 to 0.08fm. The lattice spacing error due to a_s is greatly reduced through improving both quark- and gluon-actions at certain level. We find that masses of mesons have weak dependence on both lattice spacings, while the a_s and a_t dependence for baryons is more significant. With suitable modelling of these dependencies, we are able to obtain the nucleon mass in agreement with the experiment.