We have searched for evidence of T production in 3.5 million hadronic Z decays collected by the L3 detector at LEP in 1991-1995. No signals are observed for the decay chain Z --> TX; T --> l(+)l(-) (l= e,mu), therefore upper limits at the 95% confidence level are set on the following Z branching fractions: Br(Z --> T(1S)X)<5.5 X 10(-5); Br(Z --> T(2S)X)<13.9 X 10(-5); Br(Z --> T(3S)X)<9.4 X 10(-5). Published by Elsevier Science B.V.

Upsilon production in Z decays / Acciarri, M., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., Anderhub, H., Andreev, V.P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 413:(1997), pp. 167-175. [10.1016/S0370-2693(97)01002-2]

Upsilon production in Z decays

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;L. Lista;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO;
1997

Abstract

We have searched for evidence of T production in 3.5 million hadronic Z decays collected by the L3 detector at LEP in 1991-1995. No signals are observed for the decay chain Z --> TX; T --> l(+)l(-) (l= e,mu), therefore upper limits at the 95% confidence level are set on the following Z branching fractions: Br(Z --> T(1S)X)<5.5 X 10(-5); Br(Z --> T(2S)X)<13.9 X 10(-5); Br(Z --> T(3S)X)<9.4 X 10(-5). Published by Elsevier Science B.V.
1997
Upsilon production in Z decays / Acciarri, M., Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., Anderhub, H., Andreev, V.P., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 413:(1997), pp. 167-175. [10.1016/S0370-2693(97)01002-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/473170
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