Research Papers in Physics and Astronomy

 

Date of this Version

12-15-2006

Comments

Published by American Physical Society. Phys. Rev. Lett. 97, 241801 (2006). http://prl.aps.org. Copyright © 2006 American Physical Society. Permission to use.

Abstract

We report a measurement of the Bs0 lifetime in the semileptonic decay channel Bs0Ds- μ+νX (and its charge conjugate), using approximately 0.4 fb-1 of data collected with the D0 detector during 2002–2004. Using 5176 reconstructed Ds- μ+ signal events, we have measured the Bs0 lifetime to be τ(Bs0) = 1.398 ± 0.044(stat) -0.025+0.028(syst) ps. This is the most precise measurement of the Bs0 lifetime to date.

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