We report on inclusive chi(c) production in Z decays reconstructed via the decay mode chi(c) --> J + gamma. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as chi(c1), we obtain a branching ratio Br(Z --> chi(c1) + X) = (7.5 +/- 2.9(stat.) +/- 0.6(sys.)) x 10(-3). Assuming all events are produced in b decays we obtain Br(b --> chi(c1) + X) = (2.4 +/- 0.9(stat.) +/- 0.2(sys.)) x 10(-2). We also present an improved measurement of the branching ratio Br(Z --> J + X) = (3.6 +/- 0.5(stat.) +/- 0.4(sys.)) x 10(-3), obtained from dileptonic J decays.

Chi(c)-production In Hadronic Z-decays / O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, A. ALOISIO, G. ALVERSON, M. G. ALVIGGI, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, T. ANGELESCU, L. ANTONOV, D. ANTREASYAN, P. ARCE, A. AREFIEV, A. ATAMANCHUK, T. AZEMOON, T. AZIZ, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 317:(1993), pp. 467-473. [10.1016/0370-2693(93)91026-J]

Chi(c)-production In Hadronic Z-decays

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
1993

Abstract

We report on inclusive chi(c) production in Z decays reconstructed via the decay mode chi(c) --> J + gamma. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as chi(c1), we obtain a branching ratio Br(Z --> chi(c1) + X) = (7.5 +/- 2.9(stat.) +/- 0.6(sys.)) x 10(-3). Assuming all events are produced in b decays we obtain Br(b --> chi(c1) + X) = (2.4 +/- 0.9(stat.) +/- 0.2(sys.)) x 10(-2). We also present an improved measurement of the branching ratio Br(Z --> J + X) = (3.6 +/- 0.5(stat.) +/- 0.4(sys.)) x 10(-3), obtained from dileptonic J decays.
1993
317
467
473
O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. L. ANDERSON;V. P. AN...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772794
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