CP violation in top physics

Abstract

CP violation in top physics is reviewed. The Standard Model has negligible\neffects, consequently CP violation searches involving the top quark may\nconstitute the best way to look for physics beyond the Standard Model.\nNon-standard sources of CP violation due to an extended Higgs sector with and\nwithout natural flavor conservation and supersymmetric theories are discussed.\nExperimental feasibility of detecting CP violation effects in top quark\nproduction and decays in high energy e+ e-, gamma-gamma, mu+ mu-, pp and p-bar\np colliders are surveyed. Searches for the electric, electro-weak and the\nchromo-electric dipole moments of the top quark in e+ e- -> t-bar t and in p p\n-> t-bar t X are descibed. In addition, other mechanisms that appear promising\nfor experiments, e.g., tree-level CP violation in e+ e- -> t-bar t h, t-bar t\nZ, t-bar t nu_e-bar nu_e and in the top decay t -> b tau nu_tau and CP\nviolation driven by s-channel Higgs exchanges in p p, gamma gamma, mu+ mu- ->\nt-bar t etc., are also discussed.\n