Light Quark Masses with an O(a)-Improved Action
T. Onogi, A. X. El-Khadra, B. J. Gough, G. M. Hockney, A. S. Kronfeld, P. B. Mackenzie, B. P. Mertens, J. N. Simone
Abstract
We present the recent Fermilab calculations of the masses of the light quarks, using tadpole-improved Sheikholeslami-Wohlert (SW) quarks. Various sources of systematic errors are studied. Our final result for the average light quark mass in the quenched approximation evaluated in the MS scheme is mq(μ=2 GeV;nf=0)= (mu+md)/2=3.6 0.6 MeV.
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