HAL : in2p3-00011078, version 1
 Physics Letters B 526 (2002) 34-49
 Production of D$^{**}_{s}$ mesons in hadronic Z decays
 ALEPH Collaboration(s)
 (2002)
 The production rates of the orbitally excited Ds** mesons, Ds1 and Ds2*, are measured with the 4.1 million hadronic Z decays recorded by the ALEPH detector during 1991--1995. The Ds** mesons are reconstructed in the decay modes Ds1+ -> D*+ K0, Ds1+ -> D*0 K+ and Ds2*+ -> D0 K+. The production rate of the Ds1 is measured to be n(Z->Ds1+-)=(0.52+-0.09+-0.06)%, under the assumption that the two considered decay modes of the Ds1 saturate the branching ratio. The production rate of the Ds2* is determined to be n(Z->Ds2*+-)=(0.83+-0.29+0.07-0.13)%, assuming that the branching fraction of the decay Ds2*+ -> D0 K+ is 45%. The production rates in Z->cc and Z->bbar decays are measured separately.
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
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 in2p3-00011078, version 1 http://hal.in2p3.fr/in2p3-00011078 oai:hal.in2p3.fr:in2p3-00011078 Contributeur : Hélène Kerec <> Soumis le : Vendredi 8 Février 2002, 17:15:57 Dernière modification le : Vendredi 8 Février 2002, 17:15:57