Measurement of the Λb0 Lifetime in Λb0→Λc+π- Decays in pp¯ Collisions at s=1.96 TeV Academic Article uri icon

abstract

  • We report a measurement of the lifetime of the Lambda(b)(0) baryon in decays to the Lambda(c)(+)pi(-) final state in a sample corresponding to 1.1 fb(-1) collected in pp collisions at square root of s = 1.96 TeV by the CDF II detector at the Tevatron collider. Using a sample of about 3000 fully reconstructed Lambda(b)(0) events we measure tau(Lambda(b)(0)) = 1.401 +/- 0.046(stat) +/- 0.035(syst) ps (corresponding to ctau(Lambda(b)(0)) = 420.1 +/- 13.7(stat) +/- 10.6(syst) microm, where c is the speed of light). The ratio of this result and the world average B(0) lifetime yields tau(Lambda(b)(0))/tau(B(0)) = 0.918 +/- 0.038 (stat) and (syst), in good agreement with recent theoretical predictions.

author list (cited authors)

  • Aaltonen, T., Adelman, J., González, B., Amerio, S., Amidei, D., Anastassov, A., ... Zucchelli, S.

citation count

  • 24

publication date

  • March 2010