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Exclusive measurements of b → sγ transition rate and photon energy spectrum

Lees, J. P. and Chao, D. S. and Cheng, C. H. and Doll, D. A. and Echenard, B. and Flood, K. T. and Hitlin, D. G. and Ongmongkolkul, P. and Porter, F. C. and Rakitin, A. Y. (2012) Exclusive measurements of b → sγ transition rate and photon energy spectrum. Physical Review D, 86 (5). Art. No. 052012. ISSN 2470-0010. doi:10.1103/PhysRevD.86.052012. https://resolver.caltech.edu/CaltechAUTHORS:20121029-081744225

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Abstract

We use 429  fb^(-1) of e^+e^- collision data collected at the Υ(4S) resonance with the BABAR detector to measure the radiative transition rate of b→sγ 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 B(B → X_sγ)=(3.29±0.19±0.48)×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 μ_π^2, in the kinetic and shape function models.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/ 10.1103/PhysRevD.86.052012DOIArticle
http://link.aps.org/doi/10.1103/PhysRevD.86.052012PublisherArticle
http://prd.aps.org/abstract/PRD/v86/i5/e052012PublisherArticle
ORCID:
AuthorORCID
Cheng, C. H.0000-0002-8382-0447
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
Additional Information:© 2012 American Physical Society. Received 11 July 2012; published 26 September 2012. We are grateful for the extraordinary contributions of our PEP-II colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), the Commissariat à l’Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (Netherlands), the Research Council of Norway, the Ministry of Education and Science of the Russian Federation, Ministerio de Ciencia e Innovaciόn (Spain), and the Science and Technology Facilities Council (United Kingdom). Individuals have received support from the Marie-Curie IEF program (European Union) and the A. P. Sloan Foundation (USA).
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Ministerio de Ciencia e Innovaciόn (MICINN)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Marie Curie FellowshipUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Issue or Number:5
Classification Code:PACS: 13.25.Hw, 11.30.Er, 12.15.Hh
DOI:10.1103/PhysRevD.86.052012
Record Number:CaltechAUTHORS:20121029-081744225
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121029-081744225
Official Citation:Exclusive measurements of b → sγ transition rate and photon energy spectrum J. P. Lees et al. (BABAR Collaboration) Published 26 September 2012 (16 pages) 052012
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35140
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:29 Oct 2012 15:41
Last Modified:09 Nov 2021 23:12

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