CP observables with spin-spin correlations in chargino production

Understand

We study the CP-violating terms of the spin-spin correlations in chargino production e+e- -> chi^+/-_1 chi^-/+_2, and their subsequent two-body decays into sneutrinos plus leptons.

• We propose novel CP-sensitive observables with the help of T-odd products of the spin-spin terms.
• These terms depend on the polarizations of both charginos, with one polarization perpendicular to the production plane.
• We identify two classes of CP-sensitive observables; one requires the reconstruction of the production plane, the other not.