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Published June 23, 2006 | Published
Journal Article Open

Search for the Rare Decay B^0→τ^+τ^- at BABAR


We present the results of a search for the decay B^0→τ^+τ^- in a data sample of (232±3)×10^6 Υ(4S)→BB 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(B^0→τ^+τ^-)<4.1×10^(-3) at the 90% confidence level.

Additional Information

© 2006 The American Physical Society. Received 9 November 2005; published 23 June 2006. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (USA), NSERC (Canada), IHEP (China), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MIST (Russia), and PPARC (United Kingdom). Individuals have received support from CONACyT (Mexico), A. P. Sloan Foundation, Research Corporation, and Alexander von Humboldt Foundation.

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