Long-lived charged sleptons at the ILC/CLIC

TL;DR

This paper discusses how long-lived charged sleptons at future colliders like ILC/CLIC can be used to study the properties of elusive weakly interacting LSPs, offering insights beyond current dark matter detection methods.

Contribution

It reviews proposed methods to measure LSP properties via charged slepton decays at ILC/CLIC and compares their effectiveness to LHC capabilities.

Findings

Charged sleptons can be captured and studied at ILC/CLIC.

Decays of sleptons can reveal the nature of the LSP.

Potential to measure properties of weakly interacting LSPs.

Abstract

Supersymmetric scenarios with a very weakly interacting lightest superpartner (LSP) - like the gravitino or axino - naturally give rise to a long-lived next-to-LSP (NLSP). If the NLSP is a charged slepton it leaves a very distinct signature in a collider experiment. At the ILC/CLIC it will be possible to capture a significant fraction of the produced charged sleptons and observe their decays. These decays potentially reveal the nature of the LSP and thus provide a unique possibility to measure the properties of a very weakly interacting LSP which otherwise is most likely hidden from any other observation, like direct or indirect dark matter searches. We review the proposals that have been made to measure the LSP properties at the ILC/CLIC and compare its potential to the capability of the LHC.