J / psi production in the hadronic decays of the Z
(1994) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 341, n° 1, p. 109-122 (1994)
Files
No attached file found for this publication.
Details
- Authors
- et. al.
- Abstract
- J/ψ mesons have been reconstructed from their decay to μ+μ− and e+e−, using the data collected by the DELPHI experiment during 1991 and 1992 at the LEP collider. From about 1 million hadronic Z decays 153 ± 17 J/ψ were found, 5.4 ± 2.3 ψ′ were obtained in the channel J/ψ (→μ+μ−)π+π− and 6.4 ± 2.7 χc in the channel J/ψ ( → μ+μ−)γ. As the dominant source of Jψ mesons is from bquarks, the following branching ratios: Br(b → J/ψX) = (1.12 ± 0.12 (stat) ± 0.10 (syst.))%, Br(b → ψ′ X) = (0.48 ± 0.22 (stat.± 0.10 (syst.))%, Br(b → χc1X) = (1.4 ± 0.6 (stat.)−0.2+0.4 (syst.))% were measured. From the proper time distribution of the J/ψ sample, the average lifetime of b-hadrons decaying into J/ψ was found to be: τB = 1.50−0.21+0.24 (stat.) ± 0.03 (syst.) ps. A search for completely reconstructed B meson decays to final states including a J/ψ gave a signal of 15 ± 5 events.
- Affiliations
Citations
Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1994). J / psi production in the hadronic decays of the Z. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 341(1), 109-122. https://doi.org/10.1016/0370-2693(94)01385-3 (Original work published 1994)