processes. For neutralino and chargino production the separation of the QED and weak corrections followed the prescription of the SPA project.

![Chargino, neutralino, stop and stau production cross sections for the Reference Point SPS1a’; from [@Kovarik:2005sk].[]{data-label="fig:HO"}](kov1.eps "fig:"){width="4cm" height="4cm"} ![Chargino, neutralino, stop and stau production cross sections for the Reference Point SPS1a’; from [@Kovarik:2005sk].[]{data-label="fig:HO"}](kov2.eps "fig:"){width="4cm" height="4cm"} ![Chargino, neutralino, stop and stau production cross sections for the Reference Point SPS1a’; from [@Kovarik:2005sk].[]{data-label="fig:HO"}](kov3.eps "fig:"){width="4cm" height="4cm"} ![Chargino, neutralino, stop and stau production cross sections for the Reference Point SPS1a’; from [@Kovarik:2005sk].[]{data-label="fig:HO"}](kov4.eps "fig:"){width="4cm" height="4cm"}

Experimental analyses
---------------------

Masses of superparticles can be measured very precisely in threshold scans [@R3B], which however need running time. It is therefore important to measure the masses in the continuum above thresholds including beam/bremsstrahlung effects [@beambrem]. To achieve a precision measurement one has to suppress efficiently SM background processes as well as disentangle signals coming simultaneously from different SUSY channels. Equally important is to verify the chirality assignment of sfermions.

In this respect the ability of having both beams, positrons and electrons, polarised is particularly important [@Moortgat-Pick:2005cw]. In some scenarios even 100% electron polarisation may prove insufficient to disentangle $\tilde{e}_{\rm L}^+\tilde{e}_{\rm R}^-$ and $\tilde{e}_{\rm R}^+
\tilde{e}_{\rm R}^-$ pairs and to 