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Phys Rev Lett. 2009 Jul 10;103(2):021801. doi: 10.1103/PhysRevLett.103.021801. Epub 2009 Jul 10.

Improved limits on lepton-flavor-violating tau decays to lphi, lrho, lK, and lK.

Physical review letters

B Aubert, Y Karyotakis, J P Lees, V Poireau, E Prencipe, X Prudent, V Tisserand, J Garra Tico, E Grauges, M Martinelli, A Palano, M Pappagallo, G Eigen, B Stugu, L Sun, M Battaglia, D N Brown, L T Kerth, Yu G Kolomensky, G Lynch, I L Osipenkov, K Tackmann, T Tanabe, C M Hawkes, N Soni, A T Watson, H Koch, T Schroeder, D J Asgeirsson, B G Fulsom, C Hearty, T S Mattison, J A McKenna, M Barrett, A Khan, A Randle-Conde, V E Blinov, A D Bukin, A R Buzykaev, V P Druzhinin, V B Golubev, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, K Yu Todyshev, M Bondioli, S Curry, I Eschrich, D Kirkby, A J Lankford, P Lund, M Mandelkern, E C Martin, D P Stoker, S Abachi, C Buchanan, H Atmacan, J W Gary, F Liu, O Long, G M Vitug, Z Yasin, L Zhang, V Sharma, C Campagnari, T M Hong, D Kovalskyi, M A Mazur, J D Richman, T W Beck, A M Eisner, C A Heusch, J Kroseberg, W S Lockman, A J Martinez, T Schalk, B A Schumm, A Seiden, L O Winstrom, C H Cheng, D A Doll, B Echenard, F Fang, D G Hitlin, I Narsky, 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Affiliations

  1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Université de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France.

PMID: 19659196 DOI: 10.1103/PhysRevLett.103.021801

Abstract

We search for the neutrinoless, lepton-flavor-violating tau decays tau- -->l-}V0, where l is an electron or muon and V0 is a vector meson reconstructed as phi-->K+K-, rho-->pi+pi-, K-->K+pi-, K[over ]-->K-pi+. 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)x10-8 at the 90% confidence level.

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