Experimental study of sin 2 β and sin 2 α

Detailed measurements of CP violation in B meson decay are on the horizon. Here the author reviews the status of current measurements of sin 2β made at LEP and CDF. These yield an average of sin 2β = 0.82 ± 0.39, giving 97% confidence that β is greater than 0, evidence that CP violation occurs in B decay. He reviews predictions for the precision one can expect on sin 2β and sin 2α in the next few years