Measurement of B_s⁰ Mixing Parameters from the Flavor-Tagged Decay B_s⁰ → J/ψφ

Authors

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

Date of this Version

12-12-2008

Comments

Published in PHYSICAL REVIEW LETTERS 101, 241801 (2008). Copyright © 2008 The American Physical Society. Used by permission.

Abstract

From an analysis of the flavor-tagged decay B_s⁰ → J/ ψφ we obtain the width difference between the B_s⁰ light and heavy mass eigenstates, ΔΓ_s = 0.19 ± 0.07 (stat)_-0.01^+0.02 (syst) ps^-1, and the CP-violating phase, φ_s = -0.57_-0.30^+0.24(stat)_-0.02^+0.08(syst). The allowed 90% CL intervals of ΔΓ_s and φ_s are 0.06 < ΔΓ_s < 0.30 ps^-1 and -1.20< φ_s < 0.06, respectively. The data sample corresponds to an integrated luminosity of 2.8 fb^-1 accumulated with the D0 detector at the Fermilab Tevatron collider.