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.
@article{arxiv.0802.3592,
title = {CP observables with spin-spin correlations in chargino production},
author = {A. Bartl and K. Hohenwarter-Sodek and T. Kernreiter and O. Kittel and M. Terwort},
journal= {arXiv preprint arXiv:0802.3592},
year = {2008}
}
Comments
21pp; discussion of background processes improved, references added; final version for Nucl. Phys. B