CP observables with spin-spin correlations in chargino production

Bartl, A.; Hohenwarter-Sodek, K.; Kernreiter, T.; Kittel, O.; Terwort, M.

CP observables with spin-spin correlations in chargino production

Authors

Bartl, A.

Hohenwarter-Sodek, K.

Kernreiter, T.

Kittel, O.

Terwort, M.

Description

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. Our framework is the Minimal Supersymmetric Standard Model with complex parameters.
21pp; discussion of background processes improved, references added; final version for Nucl. Phys. B