منابع مشابه
BK in Staggered Chiral Perturbation Theory
We calculate the kaon B-parameter, BK , to next-to-leading order in staggered chiral perturbation theory. We extend the usual power counting to include the effects of using perturbative (rather than non-perturbative) matching factors. Taste breaking enters through the O(a2) terms in the effective action, through mixing with higher-dimension operators, and through the truncation of matching fact...
متن کاملElectromagnetic Corrections in Staggered Chiral Perturbation Theory
To reduce errors in light-quark mass determinations, it is now necessary to consider electromagnetic contributions to light-meson masses. Calculations using staggered quarks and quenched photons are currently underway. Suitably-extended chiral perturbation theory is necessary to extrapolate the lattice data to the physical limit. Here we give (preliminary) results for light-meson masses using s...
متن کاملStaggered Chiral Perturbation Theory for All-Staggered Heavy-Light Mesons
In HISQ simulations by the MILC and Fermilab Lattice collaborations, both the light quarks and the charm quark are staggered. We extend staggered chiral perturbation theory (S χ PT) to include such all-staggered heavy-light mesons. We assume that the heavy quark action is sufficiently improved that we may take am Q << 1 (where m Q is the heavy quark mass), but also that m Q >> Λ QCD so that a c...
متن کاملHeavy-light semileptonic decays in staggered chiral perturbation theory
We calculate the form factors for the semileptonic decays of heavy-light pseudoscalar mesons in partially quenched staggered chiral perturbation theory (S PT), working to leading order in 1=mQ, where mQ is the heavy-quark mass. We take the light meson in the final state to be a pseudoscalar corresponding to the exact chiral symmetry of staggered quarks. The treatment assumes the validity of the...
متن کاملChiral Perturbation Theory for All-Staggered Heavy-Light Mesons
In highly improved staggered quark (HISQ) simulations by the HPQCD, MILC, and Fermilab Lattice collaborations, both the light quarks and the charm quark are staggered. We extend chiral perturbation theory for staggered quarks to include such all-staggered heavy-light mesons. We assume that the heavy quark action is sufficiently improved that we may take amQ << 1 (where mQ is the heavy quark mas...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2004
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)02523-4