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Estimate of $BR(\overline{B} \to X_{s}\gamma)$ at $O(\alpha_{s^2})$ / Misiak, M. (Warsaw U. ; CERN) ; Asatrian, H.M. (Yerevan Phys. Inst.) ; Bieri, K. (Bern U.) ; Czakon, M. (Wurzburg U.) ; Czarnecki, A. (Alberta U.) ; Ewerth, T. (Bern U.) ; Ferroglia, A. (Freiburg U.) ; Gambino, P. (INFN, Turin ; Turin U.) ; Gorbahn, M. (Karlsruhe U., TTP) ; Greub, C. (Bern U.) et al.
Combining our results for various O(alpha_s^2) corrections to the weak radiative B-meson decay, we are able to present the first estimate of the branching ratio at the next-to-next-to-leading order in QCD. We find BR(B -> X_s gamma) = (3.15 +_ 0.23) x 10^-4 for E_gamma > 1.6 GeV in the B-meson rest frame. [...]
hep-ph/0609232; IFT-18-2006; CERN-PH-TH-2006-184; YERPHI-1608-6; FREIBURG-THEP-06-13; DFTT-20-2006; SFB-CPP-06-45; TTP06-26; ZU-TH-22-06; SLAC-PUB-12117; DESY-06-168; DESY-06-168; DESY-2006-168; CERN-PH-TH-2006-184; IFT-2006-18; YERPHI-1608-6; Freiburg-THEP-2006-13; DFTT-20-2006; SFB-CPP-2006-45.- Hamburg : DESY, 2007 - 4 p. - Published in : Phys. Rev. Lett. 98 (2007) 022002 APS Published version, local copy: PDF; Fulltext: arXiv:hep-ph_0609232 - PDF; 0609232 - PDF; External links: Fulltext; SLAC Document Server

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