Full QCD Light Hadron Spectrum and Quark Masses: Final Results from CP-PACS

Details Full QCD Light Hadron Spectrum and Quark Masses: Final Results from CP-PACS Full QCD Light Hadron Spectrum and Quark Masses: Final Results from CP-PACS

2000-10-31

arxiv.org/abs/hep-lat/0010078v1

Nucl.Phys.Proc.Suppl. 94 (2001) 229-232

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice 2000 (Spectrum), 4 pages, 3 figures

Scientific paper

10.1016/S0920-5632(01)00961-6

We present the final results of the CP-PACS calculation of the light hadron spectrum and quark masses with two flavors of dynamical quarks. Simulations are made with a renormalization-group improved gauge action and a mean-field improved clover quark action for sea quark masses corresponding to $m_{\rm PS}/m_{\rm V} \approx 0.8$--0.6 and the lattice spacing $a=0.22$--0.11 fm. For the meson spectrum in the continuum limit a clearly improved agreement with experiment is observed compared to the quenched case, demonstrating the importance of sea quark effects. For light quark masses we obtain $m_{ud}^{\bar{MS}}(2GeV)=3.44^{+0.14}_{-0.22}$ MeV and $m_s^{\bar{MS}}(2GeV)=88^{+4}_{-6}$ MeV ($K$-input) and $m_s^{\bar{MS}}(2GeV)=90^{+5}_{-11}$ MeV ($\phi$-input), which are reduced by about 25% compared to the values in quenched QCD.

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