Measurement of the CP-violating phase ϕsJ/ψϕ using the flavor-tagged decay Bs0→J/ψϕ in 8 fb−1 of pp¯ collisions

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American Physical Society

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We report an updated measurement of the CP-violating phase, ϕsJ/ψϕ, and the decay-width difference for the two mass eigenstates, ΔΓs, from the flavor-tagged decay Bs0→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 ΔΓs=0.163−0.064+0.065  ps−1 and ϕsJ/ψϕ=−0.55−0.36+0.38. The p-value for the Standard Model point is 29.8%.

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Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Alexeev, G. D., . . . Zivkovic, L. (2012). Measurement of the CP-violating phase ϕsJ/ψϕ using the flavor-tagged decay Bs0→J/ψϕ in 8 fb−1 of pp¯ collisions. Physical Review D - Particles, Fields, Gravitation and Cosmology, 85(3), 032006. http://dx.doi.org/10.1103/PhysRevD.85.032006

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© 2012 American Physical Society.

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Article