Polarized ep collisions as probes for CP violation from beyond the standard model

We consider the deep-inelastic scattering of transversely polarized electrons with protons at DESY HERA. We consider an asymmetry defined as the difference between the number of final electrons (for neutral-current events) or jets (for charged-current events) appearing out of each half of the detector, relative to the plane defined by the direction of the electron spin and the beam axis. A nonvanishing asymmetry defined in this way indicates a …