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Measurement of the CP-violating phase ϕ J/ψϕ s using the flavor-tagged decay B0 s →J/ψϕ in 8 fb−1 of pp¯ collisions

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Published
Article number032006
<mark>Journal publication date</mark>22/02/2012
<mark>Journal</mark>Physical Review D
Issue number3
Volume85
Number of pages24
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

We report an updated measurement of the CP-violating phase, ϕ J/ψϕ s, and the decay-width difference for the two mass eigenstates, ΔΓ s, from the flavor-tagged decay B 0 s →J/ψϕ. The data sample corresponds to an integrated luminosity of 8.0 fb−1 accumulated with the D0 detector using pp¯ collisions at √s =1.96 TeV produced at the Fermilab Tevatron collider. The 68% Bayesian credibility intervals, including systematic uncertainties, are ΔΓ s=0.163 +0.065 −0.064 ps−1 and ϕ J/ψϕ s =−0.55 +0.38 −0.36. The p-value for the Standard Model point is 29.8%.

Bibliographic note

© 2012 American Physical Society

Submitted to Phys. Rev. D. 30 pages, 28 figures