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Evidence for BS0 meson production in Z0 decays

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Evidence for BS0 meson production in Z0 decays

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DELPHI Collaboration; Allen, Paul; Castillo Giménez, María Victoria; Chrin, J. T. M.; Cortina Gil, Eduardo; Fez Laso, M. D. M. de; Ferrer Soria, Antonio; Fuster Verdú, Juan A.; García García, Carmen; Gómez Cadenas, Juan José; Hernández Rey, Juan José; Higón Rodríguez, Emilio; Lozano Bahilo, José Julio; Lacasta Llácer, Carlos; Martí García, Salvador; Salt Cairols, José; Valls Ferrer, Juan Antonio; Zúñiga Román, Juan

Aquest document és un/a article, creat/da en: 1992

Seven unambiguous events out of a sample of 270 000 Z0 decays, contain in tile same jet a D(s) meson and a muon at large transverse momentum relative to the et axis. These events are direct evidence for B(s)0 meson production in hadronic Z0 decays. The production rate of these events, relative to all hadronic Z0 decays is ( 18 +/- 8) x 10(-5) this number including the relevant branching fractions of the B(s)0 and D(s). The value of the B(s)0 meson lifetime relative to the average B meson lifetime is measured to be 0.8 +/- 0.4.

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