Slepton Production at e+e- Colliders in the Complex MSSM: A Full One-Loop Analysis

TL;DR

This paper provides a comprehensive one-loop calculation of slepton production cross sections in the complex MSSM at e+e- colliders, highlighting significant corrections essential for future collider analyses.

Contribution

It presents the first full one-loop evaluation of slepton production in the cMSSM, including photon radiation and phase dependence, improving precision for collider studies.

Findings

One-loop corrections can increase cross sections by up to 40%.

Complex phases significantly affect the production rates.

Corrections are essential for accurate future collider predictions.

Abstract

For the search for scalar leptons in the Minimal Supersymmetric Standard Model (MSSM) as well as for future precision analyses of these particles an accurate knowledge of their production and decay properties is mandatory. We evaluate the cross sections for the slepton production at e+e- colliders in the MSSM with complex parameters (cMSSM). The evaluation is based on a full one-loop calculation of the production mechanisms e+e- -> slepton_s slepton_s' including soft and hard photon radiation. The dependence of the slepton production cross sections on the relevant cMSSM parameters is analyzed numerically. We find sizable contributions to many production cross sections. They amount to roughly 15% of the tree-level results but can go up to 40% or higher in extreme cases. Also the complex phase dependence of the one-loop corrections for charged slepton production was found non-negligible. The full one-loop contributions are thus crucial for physics analyses at a future linear e+e- collider such as the ILC or CLIC.