Measurement of the $\Lambda_b^0$ 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 $\tau(Lambda_b)$ = 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00164360
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Submitted on : Friday, July 20, 2007 - 10:51:04 AM
Last modification on : Thursday, November 19, 2020 - 12:58:50 PM

Citation

V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, et al.. Measurement of the $\Lambda_b^0$ lifetime using semileptonic decays. Physical Review Letters, American Physical Society, 2007, 99, pp.182001. ⟨10.1103/PhysRevLett.99.182001⟩. ⟨in2p3-00164360⟩

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