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Updated: Aug 19, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Observation of a significant excess of pi0pi0 events in B meson decays
B Aubert1, R Barate, D Boutigny
1Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France.
Abstract:
We present a study of the decay B0-->pi(0)pi(0) based on a sample of 124 x 10(6) BB pairs recorded by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We observe 46+/-13+/-3 events, where the first error is statistical and the second is systematic, corresponding to a significance of 4.2 standard deviations including systematic uncertainties. We measure the branching fraction B(B0-->pi(0)pi(0))=(2.1+/-0.6+/-0.3)x10(-6), averaged over B0 and B(0) decays.
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