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Measurement of the Λb0 Lifetime in Λb0 -> Λc+π Decays in pp Collisions at s√=1.96  TeV

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2010, vol. 104, no. 10, p. 102002
Abstract We report a measurement of the lifetime of the Λ0b baryon in decays to the Λ+cπ− final state in a sample corresponding to 1.1  fb−1 collected in pp collisions at s√=1.96  TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Λ0b events we measure τ(Λ0b)=1.401±0.046(stat)±0.035(syst)  ps (corresponding to cτ(Λ0b)=420.1±13.7(stat)±10.6(syst)  μm, where c is the speed of light). The ratio of this result and the world average B0 lifetime yields τ(Λ0b)/τ(B0)=0.918±0.038 (stat) and (syst), in good agreement with recent theoretical predictions.
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CDF COLLABORATION. Measurement of the Λb0 Lifetime in Λb0 -> Λc+π Decays in pp Collisions at s√=1.96  TeV. In: Physical Review Letters, 2010, vol. 104, n° 10, p. 102002. https://archive-ouverte.unige.ch/unige:38645

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Deposited on : 2014-07-14

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