Estimate of $\mathcal{B}(\overline{B}\ensuremath{\rightarrow}{X}_{s}\ensuremath{\gamma})$ at $O({\ensuremath{\alpha}}_{s}^{2})$

Estimate of $B (\bar{B} \to X_{s} γ)$ at $O (α_{s}^{2})$

M. Misiak, H. M. Asatrian, K. Bieri, M. Czakon, A. Czarnecki, T. Ewerth, A. Ferroglia, P. Gambino, M. Gorbahn, C. Greub, U. Haisch, A. Hovhannisyan, T. Hurth, A. Mitov, V. Poghosyan, M. Ślusarczyk, and M. Steinhauser

Phys. Rev. Lett. 98, 022002 – Published 12 January 2007

Abstract

Combining our results for various $O (α_{s}^{2})$ 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 $B (\bar{B} \to X_{s} γ) = (3.15 \pm 0.23) \times 10^{- 4}$ for $E_{γ} > 1.6 GeV$ in the $\bar{B}$ -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.

Received 24 September 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.022002

Authors & Affiliations

M. Misiak^1,2, H. M. Asatrian³, K. Bieri⁴, M. Czakon⁵, A. Czarnecki⁶, T. Ewerth⁴, A. Ferroglia⁷, P. Gambino⁸, M. Gorbahn⁹, C. Greub⁴, U. Haisch¹⁰, A. Hovhannisyan³, T. Hurth^2,11, A. Mitov¹², V. Poghosyan³, M. Ślusarczyk⁶, and M. Steinhauser⁹

¹Institute of Theoretical Physics, Warsaw University, PL-00-681 Warsaw, Poland
²Theoretical Physics Division, CERN, CH-1211 Geneva 23, Switzerland
³Yerevan Physics Institute, 375036 Yerevan, Armenia
⁴Institut für Theoretische Physik, Universität Bern, CH-3012 Bern, Switzerland
⁵Institut für Theoretische Physik und Astrophysik, Universität Würzburg, D-97074 Würzburg, Germany
⁶Department of Physics, University of Alberta, AB T6G 2J1 Edmonton, Canada
⁷Physikalisches Institut, Albert-Ludwigs-Universtität, D-79104 Freiburg, Germany
⁸INFN, Torino & Dipartimento di Fisica Teorica, Università di Torino, I-10125 Torino, Italy
⁹Institut für Theoretische Teilchenphysik, Universität Karlsruhe (TH), D-76128 Karlsruhe, Germany
¹⁰Institut für Theoretische Physik, Universität Zürich, CH-8057 Zürich, Switzerland
¹¹SLAC, Stanford University, Stanford, California 94309, USA
¹²Deutsches Elektronen-Synchrotron DESY, D-15738 Zeuthen, Germany

Analysis of $B (\bar{B} \to X_{s} γ)$ at Next-to-Next-to-Leading Order with a Cut on Photon Energy

Thomas Becher and Matthias Neubert

Phys. Rev. Lett. 98, 022003 (2007)

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Physical Review Letters

Estimate of $B (\bar{B} \to X_{s} γ)$ at $O (α_{s}^{2})$

M. Misiak, H. M. Asatrian, K. Bieri, M. Czakon, A. Czarnecki, T. Ewerth, A. Ferroglia, P. Gambino, M. Gorbahn, C. Greub, U. Haisch, A. Hovhannisyan, T. Hurth, A. Mitov, V. Poghosyan, M. Ślusarczyk, and M. Steinhauser

Phys. Rev. Lett. 98, 022002 – Published 12 January 2007

Abstract

Authors & Affiliations

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Analysis of $B (\bar{B} \to X_{s} γ)$ at Next-to-Next-to-Leading Order with a Cut on Photon Energy

Thomas Becher and Matthias Neubert

Phys. Rev. Lett. 98, 022003 (2007)

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Physical Review Letters

Estimate of B(B¯→Xsγ) at O(αs2)

M. Misiak, H. M. Asatrian, K. Bieri, M. Czakon, A. Czarnecki, T. Ewerth, A. Ferroglia, P. Gambino, M. Gorbahn, C. Greub, U. Haisch, A. Hovhannisyan, T. Hurth, A. Mitov, V. Poghosyan, M. Ślusarczyk, and M. Steinhauser

Phys. Rev. Lett. 98, 022002 – Published 12 January 2007

Abstract

Authors & Affiliations

See Also

Analysis of B(B¯→Xsγ) at Next-to-Next-to-Leading Order with a Cut on Photon Energy

Thomas Becher and Matthias Neubert

Phys. Rev. Lett. 98, 022003 (2007)

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Estimate of $B (\bar{B} \to X_{s} γ)$ at $O (α_{s}^{2})$

Analysis of $B (\bar{B} \to X_{s} γ)$ at Next-to-Next-to-Leading Order with a Cut on Photon Energy