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Report number arXiv:1503.01789 ; TTP15-007 ; SFB-CPP-14-121 ; SI-HEP-2015-08 ; QFET-2015-09 ; TTK-15-09 ; IFT-2-2015 ; TTP15-007 ; SFB-CPP-14-121 ; SI-HEP-2015-08 ; QFET-2015-09 ; TTK-15-09 ; IFT-2-2015
Title Updated NNLO QCD predictions for the weak radiative B-meson decays
Author(s) Misiak, M. (Warsaw U.) ; Asatrian, H.M. (Yerevan Phys. Inst.) ; Boughezal, R. (Argonne) ; Czakon, M. (RWTH Aachen U.) ; Ewerth, T. (KIT, Karlsruhe, TTP) ; Ferroglia, A. (CUNY, Graduate School - U. Ctr. ; New York City Coll. Tech.) ; Fiedler, P. (RWTH Aachen U.) ; Gambino, P. (INFN, Turin ; Turin U.) ; Greub, C. (U. Bern, AEC ; Bern U.) ; Haisch, U. (CERN ; Oxford U., Theor. Phys.) Afficher les 18 auteurs
Publication 2015-06-02
Imprint 05 Mar 2015
Number of pages 5
Note journal version, 5 pages, no figures
In: Phys. Rev. Lett. 114 (2015) 221801
DOI 10.1103/PhysRevLett.114.221801
Subject category Particle Physics - Phenomenology
Abstract 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.
Copyright/License arXiv nonexclusive-distrib. 1.0
publication: © 2015-2024 The Author(s) (License: CC-BY-3.0)

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 Notice créée le 2015-03-09, modifiée le 2022-10-19


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