title: Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative B-Meson Decays.
abstract: 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(α_{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_{sγ}=(3.36±0.23)×10^{-4} and B_{dγ}=(1.73_{-0.22}^{+0.12})×10^{-5}, for E_{γ}>1.6 GeV. Both results remain in agreement with the current experimental averages. Normalizing their sum to the inclusive semileptonic branching ratio, we obtain R_{γ}≡(B_{sγ}+B_{dγ})/B_{cℓν}=(3.31±0.22)×10^{-3}. A new bound from B_{sγ} on the charged Higgs boson mass in the two-Higgs-doublet-model II reads M_{H^{±}}>480 GeV at 95% C.L.
authors.affiliation: Institute of Theoretical Physics, University of Warsaw, PL-02-093 Warsaw, Poland.
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authors.affiliation: Yerevan Physics Institute, 0036 Yerevan, Armenia.
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authors.affiliation: High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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authors.lastname: Boughezal
authors.affiliation: Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, D-52056 Aachen, Germany.
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authors.lastname: Czakon
authors.affiliation: Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany.
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authors.affiliation: New York City College of Technology, CUNY, Brooklyn, New York 11201, USA.|The Graduate School and University Center, CUNY, New York, New York 10016, USA.
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authors.lastname: Ferroglia
authors.affiliation: Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, D-52056 Aachen, Germany.
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authors.affiliation: Dipartimento di Fisica, Università di Torino & INFN, Torino, I-10125 Torino, Italy.
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authors.affiliation: Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, CH-3012 Bern, Switzerland.
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authors.affiliation: Rudolf Peierls Centre for Theoretical Physics, University of Oxford, OX1 3PN Oxford, United Kingdom.|CERN, Theory Division, CH-1211 Geneva 23, Switzerland.
authors.forename: U
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authors.lastname: Haisch
authors.affiliation: Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, D-57068 Siegen, Germany.
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authors.affiliation: Institute of Theoretical Physics, University of Warsaw, PL-02-093 Warsaw, Poland.
authors.forename: M
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authors.affiliation: New York City College of Technology, CUNY, Brooklyn, New York 11201, USA.|The Graduate School and University Center, CUNY, New York, New York 10016, USA.
authors.forename: G
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authors.lastname: Ossola
authors.affiliation: Institute of Theoretical Physics, University of Warsaw, PL-02-093 Warsaw, Poland.|Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, D-57068 Siegen, Germany.
authors.forename: M
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authors.lastname: Poradziński
authors.affiliation: Institute of Theoretical Physics, University of Warsaw, PL-02-093 Warsaw, Poland.
authors.forename: A
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authors.lastname: Rehman
authors.affiliation: Physics Department, Florida State University, Tallahassee, Florida 32306-4350, USA.
authors.forename: T
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authors.lastname: Schutzmeier
authors.affiliation: Institut für Theoretische Teilchenphysik, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany.
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authors.affiliation: Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultät, Universität Siegen, D-57068 Siegen, Germany.
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