Measurement of the Λb0 Lifetime in Λb0→Λc+π- Decays in pp̅ Collisions at √s=1.96 TeV
- Aaltonen, Timo Antero
- Álvarez González, Bárbara
- Amerio, Silvia
- Amidei, Dante
- Anastassov, Anton
- Annovi, Alberto
- Antos, Jaroslav
- Apollinari, Giorgio
- Apresyan, Artur
- Arisawa, Tetsuo
- Casal Laraña, Bruno
- Cuevas Maestro, Francisco Javier
- Gómez Gramuglio, Gervasio
- Rodrigo Anoro, Teresa
- Ruiz Jimeno, Alberto
- Scodellaro, Luca
- Vila Alvarez, Ivan
- Vilar Cortabitarte, Rocío
- Artikov, A.
- Adelman, Jahred
Publication date
March 2010
DOI Publisher
American Physical Society (APS) Journal
Physical Review LettersAbstract
We report a measurement of the lifetime of the Λb0 baryon in decays to the Λc+π- final state in a sample corresponding to 1.1 fb-1 collected in pp̅ collisions at √s=1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Λb0 events we measure τ(Λb0)=1.401±0.046(stat)±0.035(syst) ps (corresponding to cτ(Λb0)=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(Λb0)/τ(B0)=0.918±0.038 (stat) and (syst), in good agreement with recent theoretical predictions
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