K-->pipi amplitudes from lattice QCD with a light charm quark

Simple item page
dc.creatorGiusti, L.
dc.creatorHernandez, P.
dc.creatorLaine, M.
dc.creatorPena, C.
dc.creatorWennekers, J.
dc.creatorWittig, H.
dc.date2006-07-20
dc.date2007-02-08
dc.date.accessioned2026-07-07T11:05:16Z
dc.date.available2026-07-07T11:05:16Z
dc.descriptionWe compute the leading-order low-energy constants of the DeltaS=1 effective weak Hamiltonian in the quenched approximation of QCD with up, down, strange, and charm quarks degenerate and light. They are extracted by comparing the predictions of finite volume chiral perturbation theory with lattice QCD computations of suitable correlation functions carried out with quark masses ranging from a few MeV up to half of the physical strange mass. We observe a large DeltaI=1/2 enhancement in this corner of the parameter space of the theory. Although matching with the experimental result is not observed for the DeltaI=1/2 amplitude, our computation suggests large QCD contributions to the physical DeltaI=1/2 rule in the GIM limit, and represents the first step to quantify the role of the charm quark-mass in K-->pipi amplitudes.
dc.description4 pages, 1 figure. Minor modifications. Final version to appear on PRL
dc.identifierhttps://arxiv.org/abs/hep-ph/0607220
dc.identifierhttp://arxiv.org/abs/hep-ph/0607220
dc.identifierPhys.Rev.Lett.98:082003,2007
dc.identifierdoi:10.1103/PhysRevLett.98.082003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189156
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Lattice
dc.titleK-->pipi amplitudes from lattice QCD with a light charm quark
dc.typetext

Files

Collections

arXiv