| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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Exclusive Measurements of b -> s gamma Transition Rate and Photon Energy Spectrum |
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| Auteur : |
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J. P. Lees1, V. Poireau1, V. Tisserand1, D. Bernard2, M. Verderi2, S. Emery3, G. Hamel de Monchenault3, G. Vasseur3, Ch. Yèche3, N. Arnaud4, M. Davier4, D. Derkach4, G. Grosdidier4, F. Le Diberder4, A. M. Lutz4, B. Malaescu4, P. Roudeau4, M. H. Schune4, A. Stocchi4, G. Wormser4, S. Akar5, E. Ben-Haim5, M. Bomben5, G.R. Bonneaud5, H. Briand5, G. Calderini5, J. Chauvau5, O. Hamon5, Ph. Leruste5, G. Marchiori5, J. Ocariz5, S. Sitt5 |
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| Laboratoire : |
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| Résumé : |
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We use 429 fb$^{-1}$ of $e^+e^-$ collision data collected at the $\Upsilon(4S)$ resonance with the BABAR detector to measure the radiative transition rate of $b\rightarrow s\gamma$ with a sum of 38 exclusive final states. The inclusive branching fraction with a minimum photon energy of 1.9 GeV is found to be $\mathcal{B}(\bar B \rightarrow X_{s}\gamma)=(3.29\pm 0.19\pm 0.48)\times 10^{-4}$ where the first uncertainty is statistical and the second is systematic. We also measure the first and second moments of the photon energy spectrum and extract the best fit values for the heavy-quark parameters, $m_{b}$ and $\mu_{\pi}^{2}$, in the kinetic and shape function models. |
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| Collaboration/Projet : |
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BABAR |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2012 |
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| Nom du périodique : |
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| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
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| Volume : |
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86 |
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| Page/Article : |
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052012 |
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| Identifiant local : |
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BABAR-PUB-11/027, SLAC-PUB-15135 |
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| Commentaire : |
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18 pages, 14 pdf figures, submitted to Phys. Rev. D - See paper for full list of authors |
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