The lifetime of the meson is measured using the semileptonic decay The data sample consists of about of collisions at collected by the CDF detector at Fermilab. Four different decay modes are reconstructed resulting in approximately 600 signal events. The meson lifetime is determined to be where the first and second uncertainties are statistical and systematic, respectively. The meson decay length distribution is examined for a lifetime difference between the two mass eigenstates of the meson. An upper limit of ΔΓ/Γ<0.83 is set at the 95% confidence level.
- Received 4 August 1998
©1999 American Physical Society