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del Amo Sanchez, P., Lees, J., Poireau, V., Prencipe, E., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M., Palano, A., Pappagallo, M. et al.
. (2011) Search for the decay B0→γγ. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.83 (No.3). 032006 . ISSN 1550-7998

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Abstract

We report the result of a search for the rare decay B(0) -> gamma gamma in 426 fb(-1) of data, corresponding to 226 x 10(6) B(0)(B) over bar (0) pairs, collected on the Y(4S) resonance at the PEP-II asymmetric-energy e(+)e(-) collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 21(-12)(+13) signal events with a statistical significance of 1.8 sigma. This corresponds to a branching fraction B(B(0) -> gamma gamma) = (1.7 +/- 1.1(stat.) +/- 0.2(syst.)) x 10(-7). Based on this result, we set a 90% confidence level upper limit of B(B(0) -> gamma gamma) < 3.2 x 10(-7).

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Date: 7 February 2011
Volume: Vol.83
Number: No.3
Number of Pages: 11
Page Range: 032006
Identification Number: 10.1103/PhysRevD.83.032006
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: SLAC , US Department of Energy , National Science Foundation , Natural Sciences and Engineering Research Council (Canada) , Commissariat a l'Energie Atomique , Institut National de Physique Nucleaire et de Physique des Particules (France) , Bundesministerium fur Bildung und Forschung , Deutsche Forschungsgemeinschaft (Germany) , Istituto Nazionale di Fisica Nucleare (Italy) , Foundation for Fundamental Research on Matter (The Netherlands) , Research Council of Norway , Ministry of Education and Science of the Russian Federation , Ministerio de Ciencia e Innovacion (Spain) , Science and Technology Facilities Council (United Kingdom) , European Union , A. P. Sloan Foundation (USA) , Binational Science Foundation (USA-Israel)
URI: http://wrap.warwick.ac.uk/id/eprint/40173

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