# Search for the $b_c$ meson in hadronic Z decays

Abstract : A search for the Bc meson decaying into the channels J/psi pi+ and J/psi l nu (l = e or mu) is performed in a sample of 3.9 million hadronic Z decays collected by the ALEPH detector. This search results in the observation of 0 and 2 candidates in each of these channels, respectively, while 0.44 and 0.81 background events are expected. The following 90\% confidence level upper limits are derived: Br(Z->Bc X)/Br(Z->q q )*Br(Bc->J/psi pi+) 3.6 10^-5 Br(Z->Bc X)/Br(Z->q q )*Br(Bc->J/psi l nu) 5.2 10^-5 An additional Bc->J/psi(e+e-) mu nu candidate with very low background probability, found in an independent analysis, is also described in detail.
Document type :
Journal articles

Cited literature [7 references]

http://hal.in2p3.fr/in2p3-00010781
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Submitted on : Friday, March 12, 1999 - 11:13:32 AM
Last modification on : Thursday, December 16, 2021 - 2:10:19 PM
Long-term archiving on: : Tuesday, June 2, 2015 - 12:12:33 PM

### Identifiers

• HAL Id : in2p3-00010781, version 1

### Citation

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, et al.. Search for the $b_c$ meson in hadronic Z decays. Physics Letters B, Elsevier, 1997, 402, pp.213-226. ⟨in2p3-00010781⟩

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