Measurement of the B_c Meson Lifetime Using B_c ->J/Psi e nu

Abstract

We present a measurement of the B_c+ meson lifetime in the semileptonic decay mode Bc+ ->J/Psi e+ nu using the CDF II detector at the Fermilab Tevatron Collider. From a sample of about 360pb-1 p-pbar collisions at sqrt(s)=1.96TeV, we reconstruct J/Psi e+ pairs with invariant mass in the kinematically allowed range 4<M(J/Psi e)<6GeV/c^2. A fit to the decay-length distribution of 238 signal events yields a measured Bc mesion lifetime 0.463 (+0.073,-0.065)+-0.036 ps.

15 pages, submitted to PRL on March 9, 2006

References in corpus (1)

• Measurement of the Dipion Mass Spectrum in X(3872) -> J/Psi Pi+ Pi- Decays

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