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Updated NNLO QCD predictions for the weak radiative B-meson decays
We perform an updated analysis of the inclusive weak radiative B-meson decays in the standard model, incorporating all our results for the O(alpha_s^2) and lower-order perturbative corrections that have been calculated after 2006. New estimates of non-perturbative effects are taken into account, too...
| Autores principales: | , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2015
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.114.221801 http://cds.cern.ch/record/1999608 |
| _version_ | 1780945927022837760 |
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| author | Misiak, M. Asatrian, H.M. Boughezal, R. Czakon, M. Ewerth, T. Ferroglia, A. Fiedler, P. Gambino, P. Greub, C. Haisch, U. Huber, Tobias Kaminski, M. Ossola, G. Poradzinski, M. Rehman, A. Schutzmeier, T. Steinhauser, M. Virto, J. |
| author_facet | Misiak, M. Asatrian, H.M. Boughezal, R. Czakon, M. Ewerth, T. Ferroglia, A. Fiedler, P. Gambino, P. Greub, C. Haisch, U. Huber, Tobias Kaminski, M. Ossola, G. Poradzinski, M. Rehman, A. Schutzmeier, T. Steinhauser, M. Virto, J. |
| author_sort | Misiak, M. |
| collection | CERN |
| description | We perform an updated analysis of the inclusive weak radiative B-meson decays in the standard model, incorporating all our results for the O(alpha_s^2) and lower-order perturbative corrections that have been calculated after 2006. New estimates of non-perturbative effects are taken into account, too. For the CP- and isospin-averaged branching ratios, we find B_{s gamma} = (3.36 +_ 0.23) * 10^-4 and B_{d gamma} = 1.73^{+0.12}_{-0.22} * 10^-5, for E_gamma > 1.6 GeV. These results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain R_gamma = ( B_{s gamma} + B_{d gamma})/B_{c l nu} = (3.31 +_ 0.22) * 10^-3. A new bound from B_{s gamma} on the charged Higgs boson mass in the two-Higgs-doublet-model II reads M_{H^+} > 480 GeV at 95%C.L. |
| id | cern-1999608 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2015 |
| record_format | invenio |
| spelling | cern-19996082022-10-19T02:04:09Zdoi:10.1103/PhysRevLett.114.221801http://cds.cern.ch/record/1999608engMisiak, M.Asatrian, H.M.Boughezal, R.Czakon, M.Ewerth, T.Ferroglia, A.Fiedler, P.Gambino, P.Greub, C.Haisch, U.Huber, TobiasKaminski, M.Ossola, G.Poradzinski, M.Rehman, A.Schutzmeier, T.Steinhauser, M.Virto, J.Updated NNLO QCD predictions for the weak radiative B-meson decaysParticle Physics - PhenomenologyWe perform an updated analysis of the inclusive weak radiative B-meson decays in the standard model, incorporating all our results for the O(alpha_s^2) and lower-order perturbative corrections that have been calculated after 2006. New estimates of non-perturbative effects are taken into account, too. For the CP- and isospin-averaged branching ratios, we find B_{s gamma} = (3.36 +_ 0.23) * 10^-4 and B_{d gamma} = 1.73^{+0.12}_{-0.22} * 10^-5, for E_gamma > 1.6 GeV. These results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain R_gamma = ( B_{s gamma} + B_{d gamma})/B_{c l nu} = (3.31 +_ 0.22) * 10^-3. A new bound from B_{s gamma} on the charged Higgs boson mass in the two-Higgs-doublet-model II reads M_{H^+} > 480 GeV at 95%C.L.Weak radiative decays of the B mesons belong to the most important flavor changing processes that provide constraints on physics at the TeV scale. In the derivation of such constraints, accurate standard model predictions for the inclusive branching ratios play a crucial role. In the current Letter we present an update of these predictions, incorporating all our results for the O(αs2) and lower-order perturbative corrections that have been calculated after 2006. New estimates of nonperturbative effects are taken into account, too. For the CP- and isospin-averaged branching ratios, we find Bsγ=(3.36±0.23)×10-4 and Bdγ=(1.73-0.22+0.12)×10-5, for Eγ>1.6 GeV. Both results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain Rγ≡(Bsγ+Bdγ)/Bcℓν=(3.31±0.22)×10-3. A new bound from Bsγ on the charged Higgs boson mass in the two-Higgs-doublet-model II reads MH±>480 GeV at 95% C.L.Weak radiative decays of the B mesons belong to the most important flavor changing processes that provide constraints on physics at the TeV scale. In the derivation of such constraints, accurate standard model predictions for the inclusive branching ratios play a crucial role. In the current Letter we present an update of these predictions, incorporating all our results for the O(alpha_s^2) and lower-order perturbative corrections that have been calculated after 2006. New estimates of nonperturbative effects are taken into account, too. For the CP- and isospin-averaged branching ratios, we find B_{s gamma} = (3.36 +_ 0.23) * 10^-4 and B_{d gamma} = 1.73^{+0.12}_{-0.22} * 10^-5, for E_gamma > 1.6GeV. Both results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain R_gamma = ( B_{s gamma} + B_{d gamma})/B_{c l nu} = (3.31 +_ 0.22) * 10^-3. A new bound from B_{s gamma} on the charged Higgs boson mass in the two-Higgs-doublet-model II reads M_{H^+} > 480 GeV at 95%C.L.arXiv:1503.01789TTP15-007SFB-CPP-14-121SI-HEP-2015-08QFET-2015-09TTK-15-09IFT-2-2015TTP15-007SFB-CPP-14-121SI-HEP-2015-08QFET-2015-09TTK-15-09IFT-2-2015oai:cds.cern.ch:19996082015-03-05 |
| spellingShingle | Particle Physics - Phenomenology Misiak, M. Asatrian, H.M. Boughezal, R. Czakon, M. Ewerth, T. Ferroglia, A. Fiedler, P. Gambino, P. Greub, C. Haisch, U. Huber, Tobias Kaminski, M. Ossola, G. Poradzinski, M. Rehman, A. Schutzmeier, T. Steinhauser, M. Virto, J. Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title | Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title_full | Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title_fullStr | Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title_full_unstemmed | Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title_short | Updated NNLO QCD predictions for the weak radiative B-meson decays |
| title_sort | updated nnlo qcd predictions for the weak radiative b-meson decays |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1103/PhysRevLett.114.221801 http://cds.cern.ch/record/1999608 |
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