Search for Z 0 decays to two leptons and a charged particle-antiparticle pair

Search for Z 0 decays to two leptons and a charged particle-antiparticle pair

Based on a sample equivalent to 365 000 hadronic Z 0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a...

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Veröffentlicht in:Nuclear physics. B 1993, Vol.403 (1), p.3-24
Hauptverfasser: Abreu, P., Adam, W., Alekseev, G.D., Algeri, A., Allen, P., Andreazza, A., Apsimon, R.J., Augustin, J-E., Barate, R., Bates, M.J., Begalli, M., Bilenky, M.S., Bogolubov, P.N., Bolognese, T., Booth, P.S.L., Borisov, G., Burmeister, H., Camporesi, T., Cavallo, F.R., Collins, P., Cortina, E., Cosme, G., Crawley, H.B., Darbo, G., De Boer, W., De Lotto, B., Dracos, M., Eerola, P.A.-M., Fassouliotis, D., Fernandez Alonso, M., Ferrer, A., Filippas, T.A., Franek, B., Frenkiel, P., Gavillet, Ph, Golovatyuk, V.M., Hallgren, A., Hedberg, V., Henkes, T., Honore, P.F., Houlden, M., Jonker, M., Karvelas, E., King, B., Koehne, J.H., Korytov, A.V., Kostioukhine, V., Lepeltier, V., Levy, J.M., Lipniacka, A., Lippi, I., Los, M., Matteuzzi, C., Mc Nulty, R., Meola, G., Nicolaidou, R., Nielsen, B.S., Obraztsov, V., Olshevski, A.G., Orava, R., Ostankov, A., Pain, R., Papadopoulou, Th.D., Pape, L., Perevozchikov, V., Perrotta, A., Petrovich, L., Pierre, F., Polok, G., Redaelli, N.G., Richard, F., Rosso, E., Saarikko, H., Sannino, M., Schyns, M.A.E., Sekulin, R., Spiriti, E., Strub, R., Tabarelli, T., Theodosiou, G.E., Timmermans, J., Toker, O., Troncon, C., Tyndel, M., Tzamarias, S., Uvarov, V., Van Der Heijden, M., Vaz, P., Vegni, G., Verbeure, F., Verlato, M., Vollmer, M., Walck, C., Waldner, F., Wehr, A., Wilkinson, G.R., Zalewska, A., Zhang, G., Zimin, N.I., Zito, M.
Format: Artikel
Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:Based on a sample equivalent to 365 000 hadronic Z 0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair.
ISSN:0550-3213
1873-1562
DOI:10.1016/0550-3213(93)90027-M