Research Papers in Physics and Astronomy

 

Date of this Version

10-5-2007

Comments

Published by American Physical Society. Phys. Rev. Lett. 99, 142001 (2007). http://prl.aps.org. Copyright © 2007 American Physical Society. Permission to use.

Abstract

Λ are identified via the decays J/ψ → μ+μ- and Λ →pπ, we measured the Λb lifetime to be 1.218-0.115+0.130 (stat) ± 0.042(syst) ps. We also measured the B0 lifetime in the decay B0J/ψ(μ+μ-)Ks2+π-) to be τ(B0) = 1.501-0.074+0.078 (stat) ± 0.050(syst) ps, yielding a lifetime ratio of τ(Λb)/τ(B0) = 0.811-0.087+0.096 (stat) ± 0.034(syst).

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