Search for the reactions e + e − → μ + τ − and e + e − → e + τ

We report on a search for the lepton-flavor-violating processes e + e − → μ + τ − and e + e − → e + τ − . The data sample corresponds to an integrated luminosity of 211 fb − 1 recorded by the BABAR experiment at the SLAC PEP-II asymmetric-energy B Factory at a center-of-mass energy of √ s = 10.5...

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Veröffentlicht in:	Physical review. D 2007-02, Vol.75 (3), Article 031103
Hauptverfasser:	Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., Stugu, B., Abrams, G. S., Battaglia, M., Brown, D. N., Button-Shafer, J., Cahn, R. N., Charles, E., Gill, M. S., Groysman, Y., Jacobsen, R. G., Kadyk, J. A., Kerth, L. T., Kolomensky, Yu. G., Kukartsev, G., Lynch, G., Mir, L. M., Orimoto, T. J., Pripstein, M., Roe, N. A., Ronan, M. T., Wenzel, W. A., del Amo Sanchez, P., Barrett, M., Ford, K. E., Hart, A. J., Harrison, T. J., Hawkes, C. M., Watson, A. T., Held, T., Koch, H., Lewandowski, B., Pelizaeus, M., Peters, K., Schroeder, T., Steinke, M., Boyd, J. T., Burke, J. P., Cottingham, W. N., Walker, D., Asgeirsson, D. J., Cuhadar-Donszelmann, T., Fulsom, B. G., Hearty, C., Knecht, N. S., Mattison, T. S., McKenna, J. A., Khan, A., Kyberd, P., Saleem, M., Sherwood, D. J., Teodorescu, L., Blinov, V. E., Bukin, A. D., Druzhinin, V. P., Golubev, V. B., Onuchin, A. P., Serednyakov, S. I., Skovpen, Yu. I., Solodov, E. P., Todyshev, K. Yu, Bondioli, M., Bruinsma, M., Chao, M., Curry, S., Eschrich, I., Kirkby, D., Lankford, A. J., Lund, P., Mandelkern, M., Mommsen, R. K., Roethel, W., Stoker, D. P., Abachi, S., Buchanan, C., Foulkes, S. D., Gary, J. W., Long, O., Shen, B. C., Wang, K., Zhang, L., Hadavand, H. K., Hill, E. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Experiments Física de partícules High Energy Physics - Experiment Particle physics Physics
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Beschreibung
Zusammenfassung:	We report on a search for the lepton-flavor-violating processes e + e − → μ + τ − and e + e − → e + τ − . The data sample corresponds to an integrated luminosity of 211 fb − 1 recorded by the BABAR experiment at the SLAC PEP-II asymmetric-energy B Factory at a center-of-mass energy of √ s = 10.58 GeV . We find no evidence for a signal and set the 90% confidence level upper limits on the cross sections to be σ μ τ < 3.8 fb and σ e τ < 9.2 fb . The ratio of the cross sections with respect to the dimuon cross section are measured to be σ μ τ / σ μ μ < 3.4 × 10 − 6 and σ e τ / σ μ μ < 8.2 × 10 − 6 .
ISSN:	1550-7998 2470-0010 1550-2368 2470-0029
DOI:	10.1103/PhysRevD.75.031103