Combined D0 measurements constraining the CP-violating phase and width difference in the B_s⁰ system

Authors

V. M. Abazov, Joint Institute for Nuclear Research, Dubna, Russia
Kenneth A. Bloom, University of Nebraska - LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
D0 Collaboration

Date of this Version

9-1-2007

Comments

Published by American Physical Society. Phys. Rev. D 76, 057101 (2007). http://prd.aps.org. Copyright © 2007 American Physical Society. Permission to use.

Abstract

We combine the D0 measurement of the width difference between the light and heavy B_s⁰ mass eigenstates and of the CP-violating mixing phase determined from the time-dependent angular distributions in the B_s⁰ → J/ψφ decays along with the charge asymmetry in semileptonic decays also measured with the D0 detector. With the additional constraint from the world average of the flavor-specific B_s⁰ lifetime, we obtain ΔΓ_s ≡ (Γ_L - Γ_H) = 0.13 ± 0.09 ps^-1 and ∣φ_s∣ = 2.44_-0.39^+0.47. The data sample corresponds to an integrated luminosity of 1.1 fb_-1 accumulated with the D0 detector at the Fermilab Tevatron Collider.