Measurement of theΛb0Lifetime Using Semileptonic Decays

2007/06/15 by V. M. Abazov, D0 Collaboration, B. Abbott +99
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.99.182001

published as Phys.Rev.Lett.99:182001,2007 · submitted to Phys. Rev. Lett

arxiv created 2007/06/15 · openalex publication_date 2007/10/30 · arxiv updated 2009/12/01 · openalex created_date 2018/01/05 · openalex updated_date 2026/08/01

Abstract

We report a measurement of the \ensuremathΛ_b⁰ lifetime using a sample corresponding to 1.3 fb^\ensuremath-1 of data collected by the D0 experiment in 2002--2006 during run II of the Fermilab Tevatron collider. The \ensuremathΛ_b⁰ baryon is reconstructed via the decay \ensuremathΛ_b⁰\ensuremath→\ensuremathμ\ensuremathν\ensuremathΛ_c⁺X. Using 4437\ifmmode±\else\textpm\fi329 signal candidates, we measure the \ensuremathΛ_b⁰ lifetime to be \ensuremathτ(\ensuremathΛ_b⁰)=1.290_\ensuremath-0.110^+0.119(stat)_\ensuremath-0.091^+0.087(syst) ps, which is among the most precise measurements in semileptonic \ensuremathΛ_b⁰ decays. This result is in good agreement with the world average value.

Citations

• b-tagging in DELPHI at LEP
• The Upgraded D0 Detector

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