Measurement of the B0s Lifetime in the Flavor-specific Decay Channel B0s {u2192} D-s?+?X.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2015 |
ISBN-10 | : OCLC:1066373119 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book Measurement of the B0s Lifetime in the Flavor-specific Decay Channel B0s {u2192} D-s?+?X. written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present an updated measurement of the B0s lifetime using the semileptonic decays B0s → D-s?+?X, with D–s → ?– and ? → K+K– (and the charge conjugate process). This measurement uses the full Tevatron Run II sample of proton-antiproton collisions at √s = 1.96 TeV, comprising an integrated luminosity of 10.4 fb–1. We find a flavor-specific lifetime ?fs(B0s) = 1.479 ± 0.010(stat) ± 0.021(syst) ps. This technique is also used to determine the B0 lifetime using the analogous B0 → D–?+?X decay with D– → ??– and ? → K+K–, yielding ?(B0) = 1.534 ± 0.019(stat) ± 0.021(syst) ps. Both measurements are consistent with the current world averages, and the B0s lifetime measurement is one of the most precise to date. As a result, taking advantage of the cancellation of systematic uncertainties, we determine the lifetime ratio ?fs(B0s)/?(B0) = 0.964 ± 0.013(stat) ± 0.007(syst).