Chiral extrapolation of lattice data for B-meson decay constant

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dc.creatorGuo, X. -H.
dc.creatorWeng, M. -H.
dc.date2006-11-24
dc.date.accessioned2026-07-07T10:37:27Z
dc.date.available2026-07-07T10:37:27Z
dc.descriptionThe B-meson decay constant fB has been calculated from unquenched lattice QCD in the unphysical region. For extrapolating the lattice data to the physical region, we propose a phenomenological functional form based on the effective chiral perturbation theory for heavy mesons, which respects both the heavy quark symmetry and the chiral symmetry, and the non-relativistic constituent quark model which is valid at large pion masses. The inclusion of pion loop corrections leads to nonanalytic contributions to fB when the pion mass is small. The finite-range regularization technique is employed for the resummation of higher order terms of the chiral expansion. We also take into account the finite volume effects in lattice simulations. The dependence on the parameters and other uncertainties in our model are discussed.
dc.description11 pages, 3 Postscript figures, accepted for publication in EPJC
dc.identifierhttps://arxiv.org/abs/hep-ph/0611301
dc.identifierhttp://arxiv.org/abs/hep-ph/0611301
dc.identifierEur.Phys.J.C50:63-71,2007
dc.identifierdoi:10.1140/epjc/s10052-006-0187-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180384
dc.subjectHigh Energy Physics - Phenomenology
dc.titleChiral extrapolation of lattice data for B-meson decay constant
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