Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$

We calculate two-loop matching conditions for all the operators that are relevant to B -> X_s l^+ l^- decay in the Standard Model. In effect, we are able to remove the +_16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We f...

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Detalles Bibliográficos
Autores principales: Bobeth, Christoph, Misiak, Mikolaj, Urban, Jorg
Lenguaje:eng
Publicado: 1999
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/S0550-3213(00)00007-9
http://cds.cern.ch/record/402379
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author Bobeth, Christoph
Misiak, Mikolaj
Urban, Jorg
author_facet Bobeth, Christoph
Misiak, Mikolaj
Urban, Jorg
author_sort Bobeth, Christoph
collection CERN
description We calculate two-loop matching conditions for all the operators that are relevant to B -> X_s l^+ l^- decay in the Standard Model. In effect, we are able to remove the +_16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We find 1.46 * 10^-6 for the branching ratio integrated in the domain 0.05 < m_{l^+l^-}^2/m_b^2 < 0.25, for l= e or mu. There remains around 13% perturbative uncertainty in this quantity, while the non-perturbative effects are expected to be smaller.
id cern-402379
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1999
record_format invenio
spelling cern-4023792021-10-08T02:30:10Zdoi:10.1016/S0550-3213(00)00007-9http://cds.cern.ch/record/402379engBobeth, ChristophMisiak, MikolajUrban, JorgPhotonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$Particle Physics - PhenomenologyWe calculate two-loop matching conditions for all the operators that are relevant to B -> X_s l^+ l^- decay in the Standard Model. In effect, we are able to remove the +_16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We find 1.46 * 10^-6 for the branching ratio integrated in the domain 0.05 < m_{l^+l^-}^2/m_b^2 < 0.25, for l= e or mu. There remains around 13% perturbative uncertainty in this quantity, while the non-perturbative effects are expected to be smaller.We calculate two-loop matching conditions for all the operators that are relevant to B -> X_s l^+ l^- decay in the Standard Model. In effect, we are able to remove the +_16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We find 1.46 * 10^-6 for the branching ratio integrated in the domain 0.05 < m_{l^+l^-}^2/m_b^2 < 0.25, for l= e or mu. There remains around 13% perturbative uncertainty in this quantity, while the non-perturbative effects are expected to be smaller.We calculate two-loop matching conditions for all the operators that are relevant to B -> X_s l^+ l^- decay in the Standard Model. In effect, we are able to remove the +_16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We find 1.46 * 10^-6 for the branching ratio integrated in the domain 0.05 < m_{l^+l^-}^2/m_b^2 < 0.25, for l= e or mu. There remains around 13% perturbative uncertainty in this quantity, while the non-perturbative effects are expected to be smaller.We calculate two-loop matching conditions for all the operators that are relevant to B → X s l + l − decay in the Standard Model. In effect, we are able to remove the ±16% uncertainty in the decay spectrum, which was mainly due to the renormalization-scale dependence of the top-quark mass. We find 1.46×10 −6 for the branching ratio integrated in the domain m l + l − 2 / m b 2 ∈[0.05,0.25], for l = e or μ . There remains around 13% perturbative uncertainty in this quantity, while the non-perturbative effects are expected to be smaller.hep-ph/9910220TUM-HEP-329-98IFT-16-98CERN-TH-99-287CERN-TH-99-287IFT-98-16TUM-HEP-329oai:cds.cern.ch:4023791999-10-05
spellingShingle Particle Physics - Phenomenology
Bobeth, Christoph
Misiak, Mikolaj
Urban, Jorg
Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title_full Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title_fullStr Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title_full_unstemmed Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title_short Photonic penguins at two loops and $m_{t}$-dependence of $BR[B \to X_{s} l^{+} l^{-}]$
title_sort photonic penguins at two loops and $m_{t}$-dependence of $br[b \to x_{s} l^{+} l^{-}]$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/S0550-3213(00)00007-9
http://cds.cern.ch/record/402379
work_keys_str_mv AT bobethchristoph photonicpenguinsattwoloopsandmtdependenceofbrbtoxsll
AT misiakmikolaj photonicpenguinsattwoloopsandmtdependenceofbrbtoxsll
AT urbanjorg photonicpenguinsattwoloopsandmtdependenceofbrbtoxsll

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