CP Violation with Bs -> J/Psi phi at the Tevatron
  Recent results using B_s -> J/Psi phi decays for measuring the CP violating phase, phi_s, and the decay width difference for the two mass eigenstates, Delta Gamma_s, are presented from the CDF and D0 experiments at the Fermilab Tevatron collider. 
Brad Abbott
hep-ex