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 / M. Acciarri, O. Adriani, M. AguilarBenitez, S. Ahlen, J. Alcaraz, G. Alemanni, J. Allaby, A. Aloisio, G. Alverson, M. G. Alviggi, G. Ambrosi, H. Anderhub, V. P. Andreev, T. Angelescu, F. Anselmo, A. Arefiev, T. Azemoon, T. Aziz, P. Bagnaia, L. Baksay, 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

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;
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
413
167
175
M. Acciarri;O. Adriani;M. AguilarBenitez;S. Ahlen;J. Alcaraz;G. Alemanni;J. Allaby;A. Aloisio;G. Alverson;M. G. Alviggi;G. Ambrosi;H. Ande...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772888
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