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

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

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dc.contributor.author Giusti, L.
dc.contributor.author Hernández Gamazo, Pilar
dc.contributor.author Laine, Mikko
dc.contributor.author Pena Ruano, Carlos
dc.contributor.author Wennekers, Jan
dc.contributor.author Wittig, Hartmut
dc.date.accessioned 2015-04-23T12:31:33Z
dc.date.available 2015-04-23T12:31:33Z
dc.date.issued 2007
dc.identifier.uri http://hdl.handle.net/10550/43338
dc.description.abstract We 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.language.iso eng
dc.relation.ispartof Physical Review Letters, 2007, vol. 98, num. 8, p. 082003-1-082003-4
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Giusti, L. Hernández Gamazo, Pilar Laine, Mikko Pena Ruano, Carlos Wennekers, Jan Wittig, Hartmut 2007 K ->pi pi amplitudes from lattice QCD with a light charm quark Physical Review Letters 98 8 082003-1 082003-4
dc.subject Física
dc.title K ->pi pi amplitudes from lattice QCD with a light charm quark
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-04-23T12:31:33Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevLett.98.082003
dc.identifier.idgrec 043134

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