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Title: Improved Limits on Lepton-Flavor-Violating τ Decays to ℓϕ, ℓρ, ℓK∗, and ℓ¯¯¯¯K∗
Author: Garra Ticó, Jordi
Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 10-Jul-2009
Publisher: American Physical Society
Abstract: We search for the neutrinoless, lepton-flavor-violating tau decays τ − → ℓ − V 0 , where ℓ is an electron or muon and V 0 is a vector meson reconstructed as ϕ → K + K − , ρ → π + π − , K ∗ → K + π − , ¯¯¯¯ K ∗ → K − π + . The analysis has been performed using 451     fb − 1 of data collected at an e + e − center-of-mass energy near 10.58 GeV with the BABAR detector at the PEP-II storage rings. The number of events found in the data is compatible with the background expectation, and upper limits on the branching fractions are set in the range ( 2.6 - 19 ) × 10 − 8 at the 90% confidence level.
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It is part of: Physical Review Letters, 2009, vol. 103, num. 2, p. 021801
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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