Resolving a challenging supersymmetric low-scale seesaw scenario at the ILC

TL;DR

This paper explores how a future 1 TeV electron-positron collider could detect and measure supersymmetric particles in a low-scale seesaw model that explains neutrino masses, which are challenging for current experiments.

Contribution

It demonstrates the potential of the ILC to discover and precisely measure sleptons in a supersymmetric low-scale seesaw scenario with light right-handed neutrinos.

Findings

ILC can discover sleptons difficult for current colliders

Spectrum measurement accuracy of 1-3% achievable

Supports natural supersymmetry with low-scale seesaw explanation for neutrino data

Abstract

We investigate a scenario inspired by natural supersymmetry, where neutrino data is explained within a low-scale seesaw scenario. For this the Minimal Supersymmetric Standard Model is extended by adding light right-handed neutrinos and their superpartners, the R-sneutrinos. Moreover, we consider the lightest electroweakinos to be higgsino-like. We demonstrate that a prospective international $e^+ e^-$ linear collider with a center of mass energy of 1 TeV will be able to discover sleptons in scenarios which can be difficult for current colliders. Moreover, we also show that a measurement of the spectrum will be possible within 1-3 per-cent accuracy.