A Search for the rare decay B0 --> tau+tau- at BABAR

Details A Search for the rare decay B0 --> tau+tau- at BABAR A Search for the rare decay B0 --> tau+tau- at BABAR

2005-11-04

arxiv.org/abs/hep-ex/0511015v3

Phys.Rev.Lett.96:241802,2006

Physics

High Energy Physics

High Energy Physics - Experiment

Resubmitted to Phys. Rev. Lett. with Eres figure and revised result (7 pages, 4 postscript figure)

Scientific paper

10.1103/PhysRevLett.96.241802

We present the results of a search for the decay B0 --> tau+tau- in a data sample of (232 +- 3) x 10^6 Upsilon(4S) --> BBbar decays using the BABAR detector. Certain extensions of the Standard Model predict measurable levels of this otherwise rare decay. We reconstruct fully one neutral B meson and seek evidence for the signal decay in the rest of the event. We find no evidence for signal events and obtain B(B0 --> tau+tau-) < 4.1 x 10^-3 at the 90% confidence level.

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