 DOCUMENT METADATASLAC Publication: SLAC-PUB-14270
SLAC Release Date: June 2, 2011
A Search for the Rare Decay $B\rightarrow\gamma\gamma$
Ruland, Andrew.
We report the result of a search for the rare decay B0 -> yy in 426 fb-1 of data, corresponding to 226 million B0B0 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 +13/-12 signal events with a statistical significance of 1.9 q. This corresponds to a branching fraction B(B0 -> yy) = (1.7 1.1(stat.) 0.2(syst.)) 10-7 . Based on this result, we set a 90% ... Show Full Abstract
We report the result of a search for the rare decay B0 -> yy in 426 fb-1 of data, corresponding to 226 million B0B0 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 +13/-12 signal events with a statistical significance of 1.9 q. This corresponds to a branching fraction B(B0 -> yy) = (1.7 1.1(stat.) 0.2(syst.)) 10-7 . Based on this result, we set a 90% confidence level upper limit of B(B0 -> yy) < 3.2 10-7. Show Partial Abstract
Download File:
|
