منابع مشابه
Light quark masses
Low energy precision experiments provide significant tests of the laws of nature that can reveal physics beyond the Standard Model. A good theoretical understanding of the low energy properties of QCD is required for this purpose. The recent developments at the interface between lattice and effective field theory methods provide an excellent basis for pion physics already now, while the extensi...
متن کاملDynamical quark effects on light quark masses
Light quark masses are calculated in lattice QCD with two degenerate flavors of dynamical quarks. The calculations are made with improved actions with lattice spacing a = 0.22-0.11 fm. In the continuum limit we find m(M&Smacr;)(ud)(2 GeV) = 3.44(+0.14)(-0.22) MeV using the pi and rho meson masses as physical input, and m(M&Smacr;)(s)(2 GeV) = 88(+4)(-6) MeV or 90(+5)(-11) MeV with the K or stra...
متن کاملA Lattice Determination of Light Quark Masses
A fully non-perturbative lattice determination of the up/down and strange quark masses is given for quenched QCD using both, O(a) improved Wilson fermions and ordinary Wilson fermions. For the strange quark mass with O(a) improved fermions we obtain m s (μ = 2GeV) = 105(4)MeV, using the interquark force scale r0. Due to quenching problems fits are only possible for quark masses larger than the ...
متن کاملLight Quark Masses and Quarkonium Decays
After discussing the intrinsic ambiguity in determining the light quark mass ratio mu/md, we reexamine the recent proposal that this ambiguity can be resolved by applying the QCD multipole expansion for the heavy quarkonium decays. It is observed that, due to instanton effects, some matrix elements which have been ignored in previous works can give a significant contribution to the decay amplit...
متن کاملLight Quark Masses Using Domain Wall Fermions *
We compute the one–loop self–energy correction to the massive domain wall quark propagator. Combining this calculation with simulations at several gauge couplings, we estimate the strange quark mass in the continuum limit. The perturbative one–loop mass renormalization is comparable to that for Wilson quarks and considerably smaller than that for Kogut–Susskind quarks. Also, scaling violations ...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2000
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(00)00572-7