Download or read book Measurement of the B0s Lifetime Using the Semileptonic Decay Channel B0s {u2192} D-s?+vX. written by and published by . This book was released on 2009 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a measurement of the B0s lifetime in the semileptonic decay channel BB0s → D-s?+vX (and its charge conjugate), using approximately 0.4 fb-1 of data collected with the DØ detector during 2002–2004. Using 5176 reconstructed D-s ?+ signal events, we have measured the B0s lifetime to be ? (B0s) = 1.398 ± 0.044 (stat)+0.028 -0.025 (syst) ps. This is the most precise measurement of the B0s lifetime to date.