Measurement of the Λb0 Lifetime in Λb0→Λc+π- Decays in pp̅ Collisions at √s=1.96 TeV
| Contribuinte(s) |
University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics University of Helsinki, Department of Physics |
|---|---|
| Data(s) |
2010
|
| Resumo |
We report a measurement of the lifetime of the Lambda_b baryon in decays to the Lambda_C+ pi- final state in a sample corresponding to 1.1 fb^-1 collected in p-pbar collisions at sqrt(s) = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda_b events we measure tau(Lambda_b) = 1.401 +- 0.046 (stat) +- 0.035 (syst) ps (corresponding to c.tau(Lambda_b) = 420.1 +- 13.7 (stat) +- 10.6 (syst) um, where c is the speed of light). The ratio of this result and the world average B^0 lifetime yields tau(Lambda_b)/tau(B^0) = 0.918 +- 0.038 (stat and syst), in good agreement with recent theoretical predictions. |
| Formato |
8 |
| Identificador |
http://hdl.handle.net/10138/24090 0031-9007 |
| Idioma(s) |
eng |
| Publicador |
American Institute of Physics |
| Relação |
Physical Review Letters |
| Fonte |
Aaltonen , T , Mehtälä , P , Orava , R , Saarikko , H , Österberg , K & CDF Collaboration 2010 , ' Measurement of the Λb0 Lifetime in Λb0→Λc+π- Decays in pp̅ Collisions at √s=1.96 TeV ' Physical Review Letters , vol 104 , no. 10 , pp. 102002 . , 10.1103/PhysRevLett.104.102002 |
| Palavras-Chave | #114 Physical sciences |
| Tipo |
A1 Refereed journal article info:eu-repo/semantics/article |
