Two-loop virtual corrections to b-> sl^+l^- in the standard model

We present the results of the O(alpha_s) two-loop virtual corrections to the differential decay width dGamma(B -> X_s l+ l-)/ds, where s is the invariant mass squared of the lepton pair. Those contributions from gluon bremsstrahlung which are needed to cancel infrared and collinear singularities...

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Detalles Bibliográficos
Autores principales: Greub, C, Walker, M
Lenguaje:eng
Publicado: 2001
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.22323/1.007.0091
http://cds.cern.ch/record/524889
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author Greub, C
Walker, M
author_facet Greub, C
Walker, M
author_sort Greub, C
collection CERN
description We present the results of the O(alpha_s) two-loop virtual corrections to the differential decay width dGamma(B -> X_s l+ l-)/ds, where s is the invariant mass squared of the lepton pair. Those contributions from gluon bremsstrahlung which are needed to cancel infrared and collinear singularities are also included. Our calculation is restricted to the range 0.05 < s/mb^2 < 0.25 where the effects from resonances are small. The new contributions drastically reduce the renormalization scale dependence of existing results for dGamma(B->X_s l+ l-)/ds. The renormalization scale uncertainty of the corresponding branching ratio (restricted to range mentioned above) gets reduced from +/-13% to +/-6.5%.
id cern-524889
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2001
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spelling cern-5248892019-09-30T06:29:59Zdoi:10.22323/1.007.0091http://cds.cern.ch/record/524889engGreub, CWalker, MTwo-loop virtual corrections to b-> sl^+l^- in the standard modelParticle Physics - PhenomenologyWe present the results of the O(alpha_s) two-loop virtual corrections to the differential decay width dGamma(B -> X_s l+ l-)/ds, where s is the invariant mass squared of the lepton pair. Those contributions from gluon bremsstrahlung which are needed to cancel infrared and collinear singularities are also included. Our calculation is restricted to the range 0.05 < s/mb^2 < 0.25 where the effects from resonances are small. The new contributions drastically reduce the renormalization scale dependence of existing results for dGamma(B->X_s l+ l-)/ds. The renormalization scale uncertainty of the corresponding branching ratio (restricted to range mentioned above) gets reduced from +/-13% to +/-6.5%.hep-ph/0110388oai:cds.cern.ch:5248892001-10-30
spellingShingle Particle Physics - Phenomenology
Greub, C
Walker, M
Two-loop virtual corrections to b-> sl^+l^- in the standard model
title Two-loop virtual corrections to b-> sl^+l^- in the standard model
title_full Two-loop virtual corrections to b-> sl^+l^- in the standard model
title_fullStr Two-loop virtual corrections to b-> sl^+l^- in the standard model
title_full_unstemmed Two-loop virtual corrections to b-> sl^+l^- in the standard model
title_short Two-loop virtual corrections to b-> sl^+l^- in the standard model
title_sort two-loop virtual corrections to b-> sl^+l^- in the standard model
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.22323/1.007.0091
http://cds.cern.ch/record/524889
work_keys_str_mv AT greubc twoloopvirtualcorrectionstobsllinthestandardmodel
AT walkerm twoloopvirtualcorrectionstobsllinthestandardmodel

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