Home > Research > Publications & Outputs > Measurement of the B0s Lifetime in the Flavor-S...

Electronic data

  • PhysRevLett.114.062001

    Rights statement: © 2015 American Physical Society

    Final published version, 274 KB, PDF-document

Links

Text available via DOI:

View graph of relations

Measurement of the B0s Lifetime in the Flavor-Specific Decay Channel B0s→D−sμ+νX

Research output: Contribution to journalJournal article

Published
  • D0 Collaboration
Close
Article number062001
<mark>Journal publication date</mark>9/02/2015
<mark>Journal</mark>Physical Review Letters
Issue number6
Volume114
Number of pages7
StatePublished
Original languageEnglish

Abstract

We present an updated measurement of the B0s lifetime using the semileptonic decays B0s→D−sμ+νX, with D−s→ϕπ− and ϕ→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 τfs(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−μ+νX decay with D−→ϕπ− and ϕ→K+K−, yielding τ(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. Taking advantage of the cancellation of systematic uncertainties, we determine the lifetime ratio τfs(B0s)/τ(B0)=0.964±0.013(stat)±0.007(syst).

Bibliographic note

© 2015 American Physical Society