Measurement of the $\Lambda_b$ Lifetime in $\Lambda_b \to \Lambda_c^+ \pi^-$ Decays in $p\bar{p}$ Collisions at $\sqrt{s} = 1.96$ TeV - INSPIRE

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Measurement of the $\Lambda_b$ Lifetime in $\Lambda_b \to \Lambda_c^+ \pi^-$ Decays in $p\bar{p}$ Collisions at $\sqrt{s} = 1.96$ TeV

CDF

Collaboration

Dec, 2009

8 pages

Published in:

Phys.Rev.Lett. 104 (2010) 102002

e-Print:

0912.3566 [hep-ex]

DOI:

10.1103/PhysRevLett.104.102002

PDG:

{{\mathit \Lambda}_{{{b}}}^{0}}

Report number:

FERMILAB-PUB-09-627-E

Experiments:

FNAL-E-0830

View in:

reference search54 citations

Citations per year

Abstract: (arXiv)

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.

Note:

Submitted to Phys. Rev. Lett

14.20.Mr
12.39.Hg
13.30.-a
OSG : CDF
Lambda/b0: hadronic decay
Lambda/b0: lifetime
Batavia TEVATRON Coll
CDF
anti-p p: interaction
bottom: pair production

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