Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative B -Meson Decays

Misiak, M.; Asatrian, H. M.; Boughezal, R.; Czakon, M.; Ewerth, T.; Ferroglia, A.; Fiedler, P.; Gambino, P.; Greub, Christoph; Haisch, U.; Huber, T.; Kamiński, M.; Ossola, G.; Poradziński, M.; Rehman, A.; Schutzmeier, T.; Steinhauser, M.; Virto, J. (2015). Updated Next-to-Next-to-Leading-Order QCD Predictions for the Weak Radiative B -Meson Decays. Physical review letters, 114(22) American Physical Society 10.1103/PhysRevLett.114.221801

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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(α2s) 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+0.12−0.22)×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.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Greub, Christoph

Subjects:

500 Science > 530 Physics

ISSN:

0031-9007

Publisher:

American Physical Society

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

17 Sep 2015 08:10

Last Modified:

21 Sep 2015 10:57

Publisher DOI:

10.1103/PhysRevLett.114.221801

ArXiv ID:

1503.01789v2

BORIS DOI:

10.7892/boris.71429

URI:

https://boris.unibe.ch/id/eprint/71429

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