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 / Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., 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

ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CHIEFARI, GIOVANNI;L. LISTA;MEROLA, LEONARDO;NAPOLITANO, MARCO;PATRICELLI, SERGIO;SCIACCA, CRISOSTOMO;
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
Chi(c)-production In Hadronic Z-decays / Adriani, O., Aguilarbenitez, M., Ahlen, S., Alcaraz, J., Aloisio, A., Alverson, G., Alviggi, M., Ambrosi, G., An, Q., Anderhub, H., Anderson, A.L., Andreev, V.P., Angelescu, T., Antonov, L., Antreasyan, D., Arce, P., Arefiev, A., Atamanchuk, A., Azemoon, T., Aziz, T., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 317:(1993), pp. 467-473. [10.1016/0370-2693(93)91026-J]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/481279
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