Precision Measurement of the Ratio B ( ϒ ( 3 S ) → τ + τ − ) / B ( ϒ ( 3 S ) → μ + μ − )

We report on a precision measurement of the ratio R_{τμ}^{ϒ(3S)}=B(ϒ(3S)→τ^{+}τ^{-})/B(ϒ(3S)→μ^{+}μ^{-}) using data collected with the BABAR detector at the SLAC PEP-II e^{+}e^{-} collider. The measurement is based on a 28 fb^{-1} data sample collected at a center-of-mass energy of 10.355 GeV corre...

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Published in:	Physical review letters 2020-12, Vol.125 (24), p.241801, Article 241801
Main Authors:	Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D. N., Fritsch, M., Hearty, C., Mattison, T. S., Blinov, V. E., Skovpen, Yu. I., Solodov, E. P., Lankford, A. J., Lockman, W. S., Cheng, C. H., Echenard, B., Flood, K. T., Kim, J., Miyashita, T. S., Meadows, B. T., Pushpawela, B. G., Sokoloff, M. D., Wagner, S. R., Verderi, M., Bettoni, D., Bozzi, C., Cibinetto, G., Luppi, E., de Sangro, R., Rotondo, M., Zallo, A., Shuve, B. J., Lacker, H. M., Mallik, U., Prell, S., Wormser, G., Wright, D. M., Coleman, J. P., Sacco, R., Cowan, G., Davis, C. L., Gradl, W., Barlow, R. J., Lafferty, G. D., Jawahery, A., Roberts, D. A., Cowan, R., Robertson, S. H., Neri, N., Godang, R., LoSecco, J. M., Gaz, A., Simi, G., Simonetto, F., Akar, S., Bonneaud, G. R., Calderini, G., Chauveau, J., Ocariz, J., Biasini, M., Rossi, A., Batignani, G., Carpinelli, M., Oberhof, B., Paoloni, E., Rizzo, G., Anulli, F., Faccini, R., Bünger, C., Dittrich, S., Grünberg, O., Leddig, T., Convery, M. R., Hast, C., Kim, P., Leith, D. W. G. S., Luitz, S., MacFarlane, D. B., Muller, D. R., Wisniewski, W. J., Sekula, S. J., Ahmed, H., Burchat, P. R., Puccio, E. M. T., Ernst, J. A., Gorodeisky, R., Ritchie, J. L., Bianchi, F., Gamba, D., Vitale, L., Martinez-Vidal, F., Albert, J., Beaulieu, A., Bernlochner, F. U., Lueck, T., Sibidanov, A., Sobie, R. J., Tasneem, N., Gershon, T. J., Harrison, P. F., Wu, S. L.
Format:	Article
Language:	English
Subjects:	Mesons PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Quarks
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