Collider physics

QCD shower simulations of W production are compared with UA1 data; two recently observed W → ell nu events with p/sub T/(W) > 50 GeV and dijets are shown to be marginably compatible with expectations. The status of the search for a charged fourth generation heavy lepton in p anti p collisions is discussed. The implications of CERN dimuon events for B0 - anti B0 mixing are considered. Trimuon events may aid in future p anti p collider identification of t-quark contributions. Superstrings offer interesting new possibilities for phenomenology, such as an extra neutral gauge boson (Z') and exotic fermions belonging to 27 representations of E6. Prospects for finding these particles are evaluated