CPViolation in Unpolarizede+e−→Charginos at One-Loop Level

P. Osland, A. Vereshagin
2007 Physical Review D  
We study CP violation in e^+ e^- to \tilde\chi_i^+\tilde\chi_j^- in the framework of the MSSM. Though the cross section of this process is CP-even at the tree level even for polarized electron-positron beams, we show that it contains a CP-odd part at the one loop order and there are CP-odd observables that can in principle be measured even using unpolarized electron-positron beams. The relevant diagram calculations are briefly discussed and the results of selected (box) diagram computations are shown.
doi:10.1103/physrevd.76.036001 fatcat:iguuno46jnfypnb5qoiqpt4f5y