Electromagnetic mass difference on the lattice
نویسندگان
چکیده
We calculate electromagnetic mass difference of mesons using a method proposed by Duncan et al. The RG-improved gauge action and the non-compact Abelian gauge action are employed to generate configurations. Quark propagators in the range of mPS/mV = 0.76− 0.51 are obtained with the meanfield-improved clover quark action. Chiral and continuum extrapolations are performed and the results are compared with experiments. Finite size effects are also examined. Quark masses are extracted from the measured spectrum. Our preliminary values for light quark masses are mMS u (μ = 2 GeV) = 3.03(19) MeV, mMS d (μ = 2 GeV) = 4.44(28) MeV, mMS s (μ = 2 GeV) = 99.2(52) MeV.
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تاریخ انتشار 2005