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

UNSPECIFIED (2015) Measurement of the B0s Lifetime in the Flavor-Specific Decay Channel B0s→D−sμ+νX. Physical review letters, 114 (6): 062001. ISSN 1079-7114

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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).

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
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© 2015 American Physical Society
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?? physics and astronomy(all) ??
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Deposited On:
18 Jun 2015 05:42
Last Modified:
13 Jun 2024 00:57