PT Journal
AU BABAR Collaboration (del Amo Sanchez, Pea
   Lopez-March, N
   Martinez-Vidal, F
   Milanes, DA
   Oyanguren, A
TI Search for the decay B-0 -> gamma gamma
SO Physical Review D
JI Phys. Rev. D
PY 2011
BP 032006
EP 11pp
VL 83
IS 4
DI 10.1103/PhysRevD.83.032006
LA English
AB 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).
ER