Measurement of the BS0 meson lifetime using semileptonic decays

F. Abe et al. (CDF Collaboration)
Phys. Rev. D 59, 032004 – Published 11 January 1999
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The lifetime of the BS0 meson is measured using the semileptonic decay BS0DSl+νX. The data sample consists of about 110pb1 of pp¯ collisions at s=1.8TeV collected by the CDF detector at Fermilab. Four different DS decay modes are reconstructed resulting in approximately 600 DSl+ signal events. The BS0 meson lifetime is determined to be τ(BS0)=(1.36±0.090.05+0.06)ps, where the first and second uncertainties are statistical and systematic, respectively. The BS0 meson decay length distribution is examined for a lifetime difference ΔΓ/Γ between the two mass eigenstates of the BS0 meson. An upper limit of ΔΓ/Γ<0.83 is set at the 95% confidence level.

  • Received 4 August 1998


©1999 American Physical Society

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Vol. 59, Iss. 3 — 1 February 1999

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