Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$

We present a compact analytic two-loop expression of the $SU(3)_f$ breaking effects on the ratio of the pseudoscalar decay constants $R_P \equiv f_{P_S}/f_P$ ($P \equiv D,B $), from which, we extract the precise values : $R_D = 1.15 \pm .04$, $R_B = 1.16 \pm .05 $, where the errors are mainly due to...

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Detalles Bibliográficos
Autor principal: Narison, Stephan
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Theory
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(94)91115-0
http://cds.cern.ch/record/255531
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author Narison, Stephan
author_facet Narison, Stephan
author_sort Narison, Stephan
collection CERN
description We present a compact analytic two-loop expression of the $SU(3)_f$ breaking effects on the ratio of the pseudoscalar decay constants $R_P \equiv f_{P_S}/f_P$ ($P \equiv D,B $), from which, we extract the precise values : $R_D = 1.15 \pm .04$, $R_B = 1.16 \pm .05 $, where the errors are mainly due to the uncalculated $\alpha_s~2$-corrections. We also scan carefully the $M_c$ (resp. $M_b$) mass dependence of $f_D$ (resp. $f_B$) in view of precise measurements of the ``perturbative'' c and b pole quark masses from the future data of the decay constants $f_P$.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
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spelling cern-2555312020-07-23T02:48:48Zdoi:10.1016/0370-2693(94)91115-0http://cds.cern.ch/record/255531engNarison, StephanPrecise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$Particle Physics - TheoryWe present a compact analytic two-loop expression of the $SU(3)_f$ breaking effects on the ratio of the pseudoscalar decay constants $R_P \equiv f_{P_S}/f_P$ ($P \equiv D,B $), from which, we extract the precise values : $R_D = 1.15 \pm .04$, $R_B = 1.16 \pm .05 $, where the errors are mainly due to the uncalculated $\alpha_s~2$-corrections. We also scan carefully the $M_c$ (resp. $M_b$) mass dependence of $f_D$ (resp. $f_B$) in view of precise measurements of the ``perturbative'' c and b pole quark masses from the future data of the decay constants $f_P$.We present a compact analytic two-loop expression of the SU(3) ƒ breaking effects on the ratio of the pseudoscalar decay constants R P ≡ ƒ P S ƒ P (P ≡ D, B) , from which we extract the precise values: R D = 1.15 ± 0.04, R B = 1.16 ± 0.05, where the errors are mainly due to the uncalculated α s 2 -corrections. We also scan carefully the M c (resp. M b ) mass dependence of ƒ D ( resp. ƒ B ) in view of precise measurements of the “perturbative” c and b pole quark masses from the future data of the decay constants ƒ P .hep-ph/9403254CERN-TH-7094-93PM-93-41CERN-TH-7094-93PM-93-41oai:cds.cern.ch:2555311994
spellingShingle Particle Physics - Theory
Narison, Stephan
Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title_full Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title_fullStr Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title_full_unstemmed Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title_short Precise determination of f$_{P_{s}}$/f$_{P}$ and measurement of the "perturbative" pole mass from f$_{P}$
title_sort precise determination of f$_{p_{s}}$/f$_{p}$ and measurement of the "perturbative" pole mass from f$_{p}$
topic Particle Physics - Theory
url https://dx.doi.org/10.1016/0370-2693(94)91115-0
http://cds.cern.ch/record/255531
work_keys_str_mv AT narisonstephan precisedeterminationoffpsfpandmeasurementoftheperturbativepolemassfromfp

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