Search for the decay B^0 → gamma-gamma

(The BABAR Collaboration)

Research output: Contribution to journalArticlepeer-review


We present a limit on the branching fraction for the decay B0→ ϒϒ using data collected at the ϒ(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e collider. Based on the observation of one event in the signal region, out of a sample of 21.3 · 106 e+e → ϒ(4S) → BB decays, we establish an upper limit on the branching fraction of B(B0→ ϒϒ) < 1.7 · 10−6 at the 90% confidence level. This result substantially improves upon existing limits.

Original languageEnglish (US)
Pages (from-to)241803-1-241803-7
JournalPhysical review letters
Issue number24
StatePublished - Dec 10 2001

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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