Search for CP Violation in the Decay tau- -> pi- K^0_S (>= 0 pi0) nu_tau

Search for CP Violation in the Decay tau- -> pi- K^0_S (>= 0 pi0) nu_tau

We report a search for CP violation in the decay \tau- -> \pi - \K^0_S (>= 0 \pi 0) \nu_\tau\ using a dataset of 437 million \tau\ lepton pairs, corresponding to an integrated luminosity of 476 fb^{-1}, collected with the BABAR detector at the PEP-II asymmetric energy e+e- storage rings. The C...

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Veröffentlicht in:Physical review. D 2012, Vol.85
Hauptverfasser: Lees, J.P., Poireau, V., Tisserand, V., Garra Tico, J., Grauges, E., Martinel, M., Milanes, D.A., Palano, A., Pappagallo, M., Eigen, G., Stugu, B., Brown, D.N., Kerth, L.T., Kolomensky, Yu. G., Lynch, G., Koch, H., Schroeder, T., Asgeirsson, D.J., Hearty, C., Mattison, T.S., Mckenna, J.A., Khan, A., Blinov, V.E., Buzykaev, A.R., Druzhinin, V.P., Golubev, V.B., Kravchenko, E.A., Onuchin, A.P., Serednyakov, S.I., Skovpen, Yu. I., Solodov, E.P., Todyshev, K. Yu, Yushkov, A.N., Bondioli, M., Kirkby, D., Lankford, A.J., Mandelkern, M., Stoker, D.P., Atmacan, H., Gary, J.W., Liu, F., Long, O., Vitug, G.M., Campagnari, C., Hong, T.M., Kovalskyi, D., Richman, J.D., West, C.A., Eisner, A.M., Kroseberg, J., Lockman, W.S., Martinez, A.J., Schalk, T., Schumm, B.A., Seiden, A., Cheng, C.H., Doll, D.A., Echenard, B., Flood, K.T., Hitlin, D.G., Ongmongkolkul, P., Porter, F.C., Rakitin, A.Y., Andreassen, R., Dubrovin, M.S., Huard, Z., Meadows, B.T., Sokoloff, M.D., Sun, L., Bloom, P.C., Ford, W.T., Gaz, A., Nagel, M., Nauenberg, U., Smith, J.G., Wagner, S.R., Ayad, R., Toki, W.H., Spaan, B., Kobel, M.J., Schubert, K.R., Schwierz, R., Bernard, D., Verderi, M., Clark, P.J., Playfer, S., Bettoni, D., Bozzi, C., Calabrese, R., Cibinetto, G., Fioravanti, E., Garzia, I., Luppi, E., Munerato, M., Negrini, M., Piemontese, L., Santoro, V., Baldini-Ferroli, R., Calcaterra, A., de Sangro, R.
Format: Artikel
Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:We report a search for CP violation in the decay \tau- -> \pi - \K^0_S (>= 0 \pi 0) \nu_\tau\ using a dataset of 437 million \tau\ lepton pairs, corresponding to an integrated luminosity of 476 fb^{-1}, collected with the BABAR detector at the PEP-II asymmetric energy e+e- storage rings. The CP-violating decay-rate asymmetry is determined to be (-0.45 +/- 0.24 +/- 0.11)%, approximately three standard deviations from the Standard Model prediction of (0.33 +/- 0.01)%.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.85.031102