22 research outputs found
Results for the Etaprime Mass from Two-Flavor Lattice QCD
We present results for the mass of the etaprime meson for two-flavor lattice
QCD in the continuum limit, calculated on the CP-PACS computer, using an
RG-improved gauge action and clover fermion action with tadpole-improved csw.
Measurements are made at three couplings corresponding to a approx. 0.22, 0.16,
0.11 fm for four quark masses corresponding to mpi over mrho approx. 0.8, 0.75,
0.7, 0.6. Thw two-loop diagrams are evaluated using a noisy source method.
Quark smearing for both one- and two- loop diagrams is successfully applied to
obtain ground state signals in the etaprime channel. We obtain
metaprime=0.960(87)+0.036-0.286GeV in the continuum limit, where the second
error represents the systematic uncertainty coming from varying the functional
form for chiral and continuum extrapolations.Comment: 3 pages, 6 figure