Search for the Baryon and Lepton Number Violating Decays $\tau \to \Lambda h$

Abstract : We have searched for the violation of baryon number B and lepton number L in the (B-L)-conserving modes tau- -> anti-Lambda0 pi- and tau- -> anti-Lambda0 K- as well as the (B-L)-violating modes tau- -> Lambda0 pi- and tau- -> Lambda0 K- using 237 inv. fb of data collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage ring. We do not observe any signal and determine preliminary upper limits on the branching fractions B(tau- -> anti-Lambda0 pi-) < 5.9 x 10^-8, B(tau- -> Lambda0 pi-) < 5.8 x 10^-8, B(tau- -> anti-Lambda0 K-) < 7.2 x 10^-8, and B(tau- -> Lambda0 K-) < 15 x 10^-8 at 90% confidence level.
Document type :
Conference papers

http://hal.in2p3.fr/in2p3-00114396
Contributor : Claudine Bombar <>
Submitted on : Thursday, November 16, 2006 - 4:39:08 PM
Last modification on : Saturday, May 22, 2021 - 3:33:44 AM

Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. Search for the Baryon and Lepton Number Violating Decays $\tau \to \Lambda h$. XXXIII International Conference on High Energy Physics (ICHEP'06), Jul 2006, Moscow, Russia. ⟨in2p3-00114396⟩

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