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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 . doi:10.1103/PhysRevD.83.032006

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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
Official Date: 7 February 2011
Dates:
DateEvent
7 February 2011Published
Volume: Vol.83
Number: No.3
Number of Pages: 11
Page Range: 032006
DOI: 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)

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