K^+ -> pi^+ pi^0 Decays on Finite Volumes and at Next-to-Leading Order in the Chiral Expansion

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dc.creatorLin, C. -J. D.
dc.creatorMartinelli, G.
dc.creatorPallante, E.
dc.creatorSachrajda, C. T.
dc.creatorVilladoro, G.
dc.date2002-08-02
dc.date2002-11-22
dc.date.accessioned2026-07-07T11:08:53Z
dc.date.available2026-07-07T11:08:53Z
dc.descriptionWe present the ingredients necessary for the determination of physical K->pi pi decay amplitudes for Delta I=3/2 transitions, from lattice simulations at unphysical kinematics and the use of chiral perturbation theory at next-to-leading order. In particular we derive the expressions for the matrix elements <pi pi(I=2)|O_W|K>, where O_W is one of the operators appearing in the Delta S=1 weak Hamiltonian, in terms of low-energy constants at next-to-leading order in the chiral expansion. The one-loop chiral corrections are evaluated for arbitrary masses and momenta, both in full QCD and in the quenched approximation. We also investigate the finite-volume effects in this procedure.
dc.description57 pages, 1 figure, minor modifications and additions, version accepted in Nucl. Phys. B
dc.identifierhttps://arxiv.org/abs/hep-lat/0208007
dc.identifierhttp://arxiv.org/abs/hep-lat/0208007
dc.identifierNucl.Phys.B650:301-355,2003
dc.identifierdoi:10.1016/S0550-3213(02)01038-6
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190286
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleK^+ -> pi^+ pi^0 Decays on Finite Volumes and at Next-to-Leading Order in the Chiral Expansion
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