CP Violation in {B_s}^0 > J psi.phi Decays 87 One of the persistent challenges FACR One of the persistent challenges confronting societies is how to reduce inequalities in the educational and occupational attainment of students from different socio economic Combining both historical and systematic studies from various angles Measured with the Collider Detector at Fermilab The phase difference between transition amplitudes (“mixing phase”) is observable and extremely sensitive to contributions from non standard model particles or interactions that may be very hard to detect otherwise – a fact that makes the precise measurement of the B_s mixing phase one of the most important goals of particle physics