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Results for the Etaprime Mass from Two-Flavor Lattice QCD

V. I. Lesk·R. Burkhalter·M. Fukugita·K. -I. Ishikawa·N. Ishizuka·Y. Iwasaki·K. Kanaya·T. Kaneko·Y. Kuramashi·M. Okawa·Y. Taniguchi·A. Ukawa·T. Umeda·T. Yoshie
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Abstract

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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V. I. Lesk, R. Burkhalter, M. Fukugita, K. -I. Ishikawa, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, M. Okawa, Y. Taniguchi, A. Ukawa, T. Umeda, T. Yoshie. 2002-11-27. Results for the Etaprime Mass from Two-Flavor Lattice QCD. https://doi.org/10.1016/s0920-5632(03)01667-0

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