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  1. Pubblicazioni

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

Articolo
Data di Pubblicazione:
2015
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.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Misiak, M.; Asatrian, H. m.; Boughezal, R.; Czakon, M.; Ewerth, T.; Ferroglia, A.; Fiedler, P.; Gambino, P.; Greub, C.; Haisch, U.; Huber, T.; Kamiński, M.; Ossola, G.; Poradziński, M.; Rehman, A.; Schutzmeier, T.; Steinhauser, M.; Virto, J.
Autori di Ateneo:
GAMBINO Paolo
Link alla scheda completa:
https://iris.unito.it/handle/2318/1520439
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/1520439/780613/PhysRevLett.114.221801.pdf
Pubblicato in:
PHYSICAL REVIEW LETTERS
Journal
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URL

http://arxiv.org/abs/1503.01789
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