CP-odd observables in neutralino production with transversee+ande−beam polarization

We consider neutralino production and decay e^+e^ --> chi^0_i chi^0_j,chi^0_j --> chi^0_1 f \bar{f} at a linear collider with transverse e^+ and e^-beam polarization. We propose CP asymmetries by means of the azimuthaldistribution of the produced neutralinos and of that of the final leptons,while taking also into account the subsequent decays of the neutralinos. Weinclude the complete spin correlations between production and decay. Ourframework is the Minimal Supersymmetric Standard Model with complex parameters.In a numerical study we show that there are good prospects to observe these CPasymmetries at the International Linear Collider and estimate the accuracyexpected for the determination of the phases in the neutralino sector.Comment: 30 pages, minor changes in the introduction, references adde