| HAL : in2p3-00717267, version 1 |
| arXiv : 1207.2520 |
| DOI : 10.1103/PhysRevD.86.052012 |
| Fiche détaillée | Récupérer au format |
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| Physical Review D 86 (2012) 052012 |
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| Exclusive Measurements of b -> s gamma Transition Rate and Photon Energy Spectrum |
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| BABAR Collaboration(s) |
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| (2012) |
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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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| Thème(s) | : | Physique/Physique des Hautes Energies - Expérience |
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| Lien vers le texte intégral : |
| in2p3-00717267, version 1 | |
| http://hal.in2p3.fr/in2p3-00717267 | |
| oai:hal.in2p3.fr:in2p3-00717267 | |
| Contributeur : Françoise Marechal | |
| Soumis le : Jeudi 12 Juillet 2012, 14:15:35 | |
| Dernière modification le : Vendredi 19 Octobre 2012, 14:36:26 | |