Search for the decay B0→γγ
Name
Sanchez-2011-Search for the decay.pdf
Size
292.32 KB
Format
Adobe PDF
Checksum (MD5)
3c9b9519ecd834026f87b4b2a4b86028
Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Zhao, M.
Alternative Title
Search for the decay B superscript 0→γγ
Date Issued
February 2011
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
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].
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevD.83.032006
