Results for the Etaprime Mass from Two-Flavor Lattice QCD

Details Results for the Etaprime Mass from Two-Flavor Lattice QCD Results for the Etaprime Mass from Two-Flavor Lattice QCD

2002-11-27

arxiv.org/abs/hep-lat/0211041v1

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, 6 figures

Scientific paper

10.1016/S0920-5632(03)01667-0

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.

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