Properties of the a1 Meson from Lattice QCD

Matthew Wingate, Thomas DeGrand, Sara Collins, Urs M. Heller

Published 1995-02-10, updated 1995-06-24Version 2

We determine the mass and decay constant of the $a_1$ meson using Monte Carlo simulation of lattice QCD. We find $M_{a_1} = 1250 \pm 80$ MeV and $f_{a_1} = 0.30 \pm 0.03 ~({\rm GeV})^2$, in good agreement with experiment.