Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda

Details Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda

2007-04-30

arxiv.org/abs/0704.3909v2

Phys.Rev.Lett.99:142001,2007

Physics

High Energy Physics

High Energy Physics - Experiment

This version has been accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.99.142001

We have measured the Lambda_b lifetime using the exclusive decay Lambda_b to J/psi Lambda, based on 1.2 fb-1 of data collected with the D0 detector during 2002-2006. From 171 reconstructed Lambda_b decays, where the J/psi and Lambda are identified via the decays J/psi to mu+ mu- and Lambda to p pi, we measured the Lambda_b lifetime to be tau(Lambda_b) = 1.218(+0.130,-0.115)(stat) +/- 0.042(syst)ps. We also measured the B0 lifetime in the decay B0 to J/psi(mu+ mu-)K0_S(pi+ pi-) to be tau(B0) = 1.501(+0.078,-0.074)(stat) +/ -0.050(syst)ps, yielding a lifetime ratio of tau(Lambda_b)/tau(B0) = 0.811(+0.096,-0.087)(stat) +/ -0.034(syst). These measurements are consistent with the current world averages and support the shorter lifetime of the Lambda_b with respect to B mesons, in contrast to another recent measurement of significant precision.

Affiliated with

Also associated with

No associations

Rating

Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Lambda_b lifetime in the exclusive decay Lambda_b to J/psi Lambda will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-415249