Applications of Partially Quenched Chiral Perturbation Theory

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dc.creatorGolterman, Maarten
dc.creatorLeung, Ka Chun
dc.date1997-11-17
dc.date1998-02-24
dc.date.accessioned2026-07-07T10:32:34Z
dc.date.available2026-07-07T10:32:34Z
dc.descriptionPartially quenched theories are theories in which the valence- and sea-quark masses are different. In this paper we calculate the nonanalytic one-loop corrections of some physical quantities: the chiral condensate, weak decay constants, Goldstone boson masses, B_K and the K+ to pi+ pi0 decay amplitude, using partially quenched chiral perturbation theory. Our results for weak decay constants and masses agree with, and generalize, results of previous work by Sharpe. We compare B_K and the K+ decay amplitude with their real-world values in some examples. For the latter quantity, two other systematic effects that plague lattice computations, namely, finite-volume effects and unphysical values of the quark masses and pion external momenta are also considered. We find that typical one-loop corrections can be substantial.
dc.description22 pages, TeX, refs. added, minor other changes, version to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-lat/9711033
dc.identifierhttp://arxiv.org/abs/hep-lat/9711033
dc.identifierPhys.Rev.D57:5703-5710,1998
dc.identifierdoi:10.1103/PhysRevD.57.5703
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178795
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleApplications of Partially Quenched Chiral Perturbation Theory
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