Measurement of the Lambda_b lifetime using semileptonic decays

Abstract

We report a measurement of the Lambda_b lifetime using a sample corresponding to 1.3 fb${}^{-1}$ of data collected by the D0 experiment in 2002--2006 during Run II of the Fermilab Tevatron collider. The Lambda_b baryon is reconstructed via the decay Lambda_b -> mu nu Lambda_c X. Using $4437\pm 329$ signal candidates, we measure the Lambda_b lifetime to be $\tau (Lambd{a}_b)$ = 1.290^{+0.119}_{-0.110}(stat) ^{+0.087}_{-0.091} (syst) ps, which is among the most precise measurements in semileptonic Lambda_b decays. This result is in good agreement with the world average value.

submitted to Phys. Rev. Lett

References in corpus (14)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• High-Energy-Physics Event Generation with PYTHIA 6.1
• The Upgraded D0 Detector
• Direct Limits on the Bs Oscillation Frequency
• Spectator Effects in Inclusive Decays of Beauty Hadrons
• The Muon System of the Run II D0 Detector
• Spectator effects and lifetimes of heavy hadrons
• Lifetime Ratios of Beauty Hadrons at the Next-to-Leading Order in QCD
• b-tagging in DELPHI at LEP
• An Exploratory Lattice Study of Spectator Effects in Inclusive Decays of the Lambda_b Baryon
• Measurement of the Lambda_b Lifetime in Lambda_b --> J/psi Lambda0 in p-pbar Collisions at sqrt(s)=1.96 TeV
• Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda
• Measurement of the Ratio of B+ and B0 Meson Lifetimes

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