CHI(C)-PRODUCTION IN HADRONIC Z-DECAYS

CHI(C)-PRODUCTION IN HADRONIC Z-DECAYS

We report on inclusive xc production in Z decays reconstructed via the decay mode Xc → J + γ. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as Xcl, we obtain a branching ratio Br(Z→ Xcl + X) = (7.5±2.9(stat.) ±0.6(sys.)) × 10-3. Assuming all events are pro...

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Bibliographic Details
Main Authors: Adriani, O, Aguilarbenitez, M, Ahlen, S, Alcaraz, J, Aloisio, A, Alverson, G, Alviggi, M, Ambrosi, G, An, Q, Anderhub, H, Anderson, A, Andreev, V, Angelescu, T, Antonov, L, Antreasyan, D, Arce, P, Arefiev, A, Atamanchuk, A, Azemoon, T, Aziz, T, Baba, P, Bagnaia, P, Bakken, J, Ball, R, Banerjee, S
Format: Journal article
Published: 1993
Description
Summary:We report on inclusive xc production in Z decays reconstructed via the decay mode Xc → J + γ. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as Xcl, we obtain a branching ratio Br(Z→ Xcl + X) = (7.5±2.9(stat.) ±0.6(sys.)) × 10-3. Assuming all events are produced in b decays we obtain Br(b→ Xcl + X) = (2.4 ± 0.9(stat.) ±0.2(sys.)) × 10-2. We also present an improved measurement of the branching ratio Br(Z → J + X) = (3.6 ± 0.5 (stat.) ± 0.4 (sys.)) × 10-3, obtained from dileptonic J decays. © 1993.

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