Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$

The decay B_s -> mu^+ mu^- in the Standard Model is generated by the well-known W-box and Z-penguin diagrams that give rise to an effective quark-lepton operator Q_A at low energies. We compute QCD corrections of order alpha_s^2 to its Wilson coefficient C_A. It requires performing three-loop mat...

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Detalles Bibliográficos
Autores principales: Hermann, Thomas, Misiak, Mikolaj, Steinhauser, Matthias
Lenguaje:eng
Publicado: 2013
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1007/JHEP12(2013)097
http://cds.cern.ch/record/1625764
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author Hermann, Thomas
Misiak, Mikolaj
Steinhauser, Matthias
author_facet Hermann, Thomas
Misiak, Mikolaj
Steinhauser, Matthias
author_sort Hermann, Thomas
collection CERN
description The decay B_s -> mu^+ mu^- in the Standard Model is generated by the well-known W-box and Z-penguin diagrams that give rise to an effective quark-lepton operator Q_A at low energies. We compute QCD corrections of order alpha_s^2 to its Wilson coefficient C_A. It requires performing three-loop matching between the full and effective theories. Including the new corrections makes C_A more stable with respect to the matching scale mu_0 at which the top-quark mass and alpha_s are renormalized. The corresponding uncertainty in |C_A|^2 gets reduced from around 1.8% to less than 0.2%. Our results are directly applicable to all the B_{s(d)} -> l^+ l^- decay modes.
id cern-1625764
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2013
record_format invenio
spelling cern-16257642019-09-30T06:29:59Zdoi:10.1007/JHEP12(2013)097http://cds.cern.ch/record/1625764engHermann, ThomasMisiak, MikolajSteinhauser, MatthiasThree-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$Particle Physics - PhenomenologyThe decay B_s -> mu^+ mu^- in the Standard Model is generated by the well-known W-box and Z-penguin diagrams that give rise to an effective quark-lepton operator Q_A at low energies. We compute QCD corrections of order alpha_s^2 to its Wilson coefficient C_A. It requires performing three-loop matching between the full and effective theories. Including the new corrections makes C_A more stable with respect to the matching scale mu_0 at which the top-quark mass and alpha_s are renormalized. The corresponding uncertainty in |C_A|^2 gets reduced from around 1.8% to less than 0.2%. Our results are directly applicable to all the B_{s(d)} -> l^+ l^- decay modes.arXiv:1311.1347SFB-CPP-13-83TTP13-034oai:cds.cern.ch:16257642013-11-06
spellingShingle Particle Physics - Phenomenology
Hermann, Thomas
Misiak, Mikolaj
Steinhauser, Matthias
Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title_full Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title_fullStr Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title_full_unstemmed Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title_short Three-loop QCD corrections to $B_{s} \rightarrow \mu^{+}\mu^{-}$
title_sort three-loop qcd corrections to $b_{s} \rightarrow \mu^{+}\mu^{-}$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1007/JHEP12(2013)097
http://cds.cern.ch/record/1625764
work_keys_str_mv AT hermannthomas threeloopqcdcorrectionstobsrightarrowmumu
AT misiakmikolaj threeloopqcdcorrectionstobsrightarrowmumu
AT steinhausermatthias threeloopqcdcorrectionstobsrightarrowmumu

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