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Search for the decay B0→γγ

Author(s)
Cowan, Ray Franklin; Dujmic, Denis; Sciolla, Gabriella; Zhao, Min Liang
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.

Alternative title
Search for the decay B superscript 0→γγ
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We report the result of a search for the rare decay B0→γγ [B superscript 0→γγ] in 426  fb-1 [fb superscript -1] of data, corresponding to 226×106 B0B̅ 0 [226 x 10 superscript 6 B superscript 0 B̅ superscript 0] pairs, collected on the Υ(4S) resonance at the PEP-II asymmetric-energy e+e- [e superscript + e superscript -] collider using the BABAR detector. We use a maximum likelihood fit to extract the signal yield and observe 21-12+13 [21 subscript -12 superscript +13] signal events with a statistical significance of 1.8σ [1.8 delta]. This corresponds to a branching fraction B(B0→γγ)=(1.7±1.1(stat.)±0.2(syst.))×10-7 [B(B superscript 0→γγ) = (1.7±1.1(stat.)±0.2(syst.))×10 superscript -7]. Based on this result, we set a 90% confidence level upper limit of B(B0→γγ)<3.2×10-7 [B(B superscript 0→γγ)<3.2×10 superscript -7].
Date issued
2011-02
URI
http://hdl.handle.net/1721.1/64780
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical review D
Publisher
American Physical Society
Citation
del Amo Sanchez, P. et al. “Search for the Decay B^{0}→γγ.” Physical Review D 83.3 (2011) : n. pag. © 2011 American Physical Society
Version: Final published version
ISSN
1550-7998
1550-2368

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