One-loop matching of Delta S=2 four-quark operators with improved staggered fermions

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dc.creatorBecher, Thomas
dc.creatorGamiz, Elvira
dc.creatorMelnikov, Kirill
dc.date2005-07-22
dc.date.accessioned2026-07-07T11:26:37Z
dc.date.available2026-07-07T11:26:37Z
dc.descriptionWe compute O(alpha_s) lattice-to-continuum perturbative matching coefficients for the Delta S=2 flavor changing four-quark operators for the Asqtad improved staggered action. In conjunction with lattice simulations with three flavors of light, dynamical quarks, our results yield an unquenched determination of B_K, the parameter that determines the amount of indirect CP violation in the neutral kaon system. Its value is an important input for the unitarity triangle analysis of weak decays.
dc.description11 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/hep-lat/0507033
dc.identifierhttp://arxiv.org/abs/hep-lat/0507033
dc.identifierPhys.Rev.D72:074506,2005
dc.identifierdoi:10.1103/PhysRevD.72.074506
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195883
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOne-loop matching of Delta S=2 four-quark operators with improved staggered fermions
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