Abstract
The electroproduction of scalar leptons and gauginos at HERA and at supercollider energies is studied. In particular, the channel ep → e(→ e + γ)γX is analyzed in full detail. The exa analytic expressions for the cross section and the spectrum of the final electron are derived and evaluated for √s ⋍ 0.15−3 TeV and different values of the scalar electron and photino masses. Since the exact formulae are relatively complicated, simplified expressions in the Weizsacker-Williams approximation are also given and their accuracy is discussed by comparison with the exact formulae. The standard processes ep → Z(→ vv)eX and ep → W(→ ev)vX which also lead to one final electron and two invisible particles are considered in parallel. The corresponding cross sections and distributions are discussed in comparison with the supersymmetric signal. The Z0 cross section is found to be quite smaller than was reported previously. To clarify this point the Z0 production at the leptonic vertex was computed both exactly and in the Weizsacker-Williams approximation with quite consistent results.
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