Search for scalar leptoquarks from Z 0 decays

Search for scalar leptoquarks from Z 0 decays

We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z 0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be...

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Veröffentlicht in:Physics letters. B 1992, Vol.275 (1), p.222-230
Hauptverfasser: Adye, T., Alvsvaag, S.J., Astier, P., Battaglia, M., Begalli, M., Beilliere, P., Billoir, P., Bocci, V., Booth, P.S.L., Boratav, M., Borgeaud, P., Bostjancic, B., Brunet, J.-M., Burmeister, H., Caccia, M., Cattai, A., Chevalier, L., Crennell, D., Dagoret, S., Dalmagne, B., Darbo, G., Davenport, M., De Boer, W., De Clercq, C., Delikaris, D., Demaria, N., Dufour, Y., Ekspong, G., Fries, D.C., Fuster, J., Gavillet, P., Giamocelli, P., Y. Cadenas, J.J., Graziani, E., Gross, E., Grossetete, B., Hahn, M., Hietanen, I., Higon, E., Hofmokl, T., Hrubec, J., Isenhower, D., Jalocha, P., Khomenko, B.A., Kloving, A., Koratzinos, M., Kostiukhin, V., Kronkvist, I., Krstic, J., Kucewicz, W., Lauhakangas, R., Leder, G., Lepeltier, V., Letessier-Selvon, A., Liko, D., Lieb, E., Lindgren, J., Lokajicek, M., Lopez Aguera, M.A., Lyons, L., Maillard, J., Marco, J., Matthiae, G., Mc Kay, R., Menichetti, E., Meroni, C., Meyer, W.T., Mitselmakher, G.v., Murray, W.J., Navarria, F.L., Papadopoulou, T., Pol, M.E., Ridky, J., Ronchese, P., Sajot, G., Sannino, M., Schyns, M.A.E., Sette, G., Simonetti, S., Smidth, G.R., Sosnowski, R., Strauss, J., Toet, D.Z., Treille, D., Trevisan, U., Trischuk, W., Tristram, G., Tyndel, M., Vallazza, E., Van Doninck, W.K., Varela, J., Vaz, P., Vibert, L., Vollmer, M., Wahlen, H., Wilkinsi, G.R., Wormald, D., Zavrtanik, D., Zitoun, R., Zuniga, J.
Format: Artikel
Sprache:eng
Schlagworte:
High Energy Physics - Experiment
Physics
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Zusammenfassung:We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z 0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be about 42 GeV/ c 2 depending only slightly on the models used and a coupling times branching ratio exclusion line is drawn for a scalar leptoquark with a free coupling. We have also probed the mass region above 45 GeV/ c 2 for a singly produced scalar leptoquark and set limits on the cross section and the coupling λ 2/4 π up to 60 GeV.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(92)90878-8