During the proton-anti proton collider run several experiments were carried
out in order to understand the effect of the beam-beam interaction on
backgrounds and lifetimes. In this talk a selection of these experiments will
be presented. From these experiments, the importance of relative beam sizes and
tune ripple could be demonstrated.Comment: 3 pages, contribution to the ICFA Mini-Workshop on Beam-Beam Effects
in Hadron Colliders, CERN, Geneva, Switzerland, 18-22 Mar 201