HAL : in2p3-00000024, version 1
 Physics Letters B 438 (1998) 417-429
 Upper Limit on the Lifetime Difference of Short- and Long-lived $B^0_s$ Mesons
 L3 Collaboration(s)
 (1998)
 An upper limit on the lifetime difference of short- and long-lived $\rm B^0_s$ mesons has been obtained using an inclusive bottom hadron sample from 2 million hadronic Z decays collected by the L3 experiment at LEP. A lifetime fit has been performed on data samples separately enriched in neutral and charged b hadrons. An experimental upper limit on the decay rate difference of short- and long-lived $\rm B^0_s$ mesons of \begin{displaymath} ~~~~ {\rm (|\Delta\Gamma|/\Gamma)_{B^0_s}} 0.67 ~~~~~~~\mathrm{(95\% \; C.L.)} \end{displaymath} has been determined. In addition, the lifetimes of $\rm B^+$ and $\rm B^0_d$ mesons have been measured to be $\tau(\rm B^+) = 1.66 \pm 0.06 \, \pm 0.03 \; \mathrm{ps}$ and $\tau(\rm B^0_d) = 1.52 \pm 0.06 \, \pm 0.04 \; \mathrm{ps}$, where the first errors are statistical and the second are systematic.
 équipe(s) de recherche : CMS
 Thème(s) : Physique/Physique des Hautes Energies - Expérience
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 in2p3-00000024, version 1 http://hal.in2p3.fr/in2p3-00000024 oai:hal.in2p3.fr:in2p3-00000024 Contributeur : Sylvie Florès <> Soumis le : Jeudi 5 Novembre 1998, 15:25:26 Dernière modification le : Mercredi 20 Avril 2005, 16:24:16