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BIBTEX RIS

Estimate of B ( B ¯ → X s γ ) at O (</mml:mo…

2007; American Physical Society; Volume: 98; Issue: 2 Linguagem: Inglês

10.1103/physrevlett.98.022002

ISSN

1092-0145

Autores

Mikołaj Misiak, H. M. Asatrian, K. Bieri, M. Czakon, Andrzej Czarnecki, T. Ewerth, Andrea Ferroglia, Paolo Gambino, Martin Gorbahn, C. Greub, Ulrich Haisch, A. Hovhannisyan, Tobias Hurth, Alexander Mitov, V. Poghosyan, Magdalena Ślusarczyk, Matthias Steinhauser,

Tópico(s)

High-Energy Particle Collisions Research

Resumo

Combining our results for various O(alpha[s]) 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 B(B[over ]-->X[s]gamma)=(3.15+/-0.23) x 10(-4) for Egamma>1.6 GeV in the B[over ]-meson rest frame. The four types of uncertainties:nonperturbative (5%), parametric (3%), higher-order (3%), and m(c)-interpolation ambiguity (3%) have been added in quadrature to obtain the total error.

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