Pair Production of Smuons and Selectrons Near Threshold in e+ e- and e- e- Collisions

Abstract

Non-zero width and Coulomb rescattering effects are analyzed for the pair production of smuons and selectrons near the thresholds in e+ e- and e- e- collisions, respectively. The excitation curves are predicted in a gauge-invariant form. Energy cuts are designed to reduce irreducible supersymmetric backgrounds.

17 pages, 8 figures, few typos corrected, version to appear in EPJ C

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