Cp Phases in Correlated Trilepton Signal at Tevatron

We study the tri–lepton signal for supersymmetric particle searches at the Teva-tron including the CP phases Φ µ and Φ 1 and the production–decay spin correlations. The phases affect very strongly the production rate and the branching fractions of the leptonic chargino and neutralino decays and, as a result, could lead to a sharp drop in the tri–lepton signal rate. We demonstrate the importance of taking spin correlations into account by comparing the angular distribution of the lepton from the chargino decay in the correlated case with that in the un–correlated case. The tri–lepton spin–correlation leads to an interesting T–odd triple product of three lepton momenta, the size of which might be large enough to be detected at the upgraded Tevatron.