Twisted mass QCD and lattice approaches to the $ΔI = 1/2$ rule

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dc.creatorPena, C.
dc.creatorSint, S.
dc.creatorVladikas, A.
dc.date2004-05-27
dc.date2004-10-22
dc.date.accessioned2026-07-07T10:48:24Z
dc.date.available2026-07-07T10:48:24Z
dc.descriptionTwisted mass lattice QCD (tmQCD), generalised to four Wilson quark flavours, can be used for the computation of some weak matrix elements related to $ΔI=1/2$ transitions. Besides eliminating unphysical zero modes, tmQCD may alleviate long-standing renormalisation problems of the four-quark operators which contribute to CP-conserving $K\toπ$ transitions. With an active charm quark, the renormalisation of the $K\toπ$ matrix elements requires at most the subtraction of a linearly divergent counterterm. Furthermore, in the (partially) quenched approximation the twist angles can be chosen so that only a finite counterterm needs to be subtracted.
dc.description35 pages;final version with references added
dc.identifierhttps://arxiv.org/abs/hep-lat/0405028
dc.identifierhttp://arxiv.org/abs/hep-lat/0405028
dc.identifierJHEP0409:069,2004
dc.identifierdoi:10.1088/1126-6708/2004/09/069
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183867
dc.subjectHigh Energy Physics - Lattice
dc.titleTwisted mass QCD and lattice approaches to the $ΔI = 1/2$ rule
dc.typetext

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