Research Papers in Physics and Astronomy

 

Date of this Version

3-6-2009

Comments

Published in PHYSICAL REVIEW LETTERS 102, 092001 (2009). Copyright © 2009 The American Physical Society. Used by permission.

Abstract

Using approximately 1.3 fb-1 of data collected by the D0 detector between 2002 and 2006, we measure the lifetime of the Bc± meson in the Bc±J/ψμ± + X final state. A simultaneous unbinned likelihood fit to the J/ψ + μ invariant mass and lifetime distributions yields a signal of 881 ± 80(stat) candidates and a lifetime measurement of τ(Bc±) = 0.448-0.036+0.038(stat) ± 0.032(syst) ps.

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