Analysis of the TeV-scale mirage mediation with heavy superparticles

TL;DR

This paper explores a supersymmetric model with mirage mediation, focusing on the mass spectrum and phenomenology of light higgsinos and Higgs fields, and assesses experimental constraints and future detection prospects.

Contribution

It provides a detailed analysis of the effective low-energy model derived from mirage mediation, highlighting the potential light Higgsinos and Higgs fields and their distinguishability from standard 2HDMs.

Findings

Light higgsinos achieved via low-scale unification of SUSY breaking parameters.

Extra Higgs fields can be light, leading to a 2HDM-like phenomenology.

Current experimental bounds constrain the SUSY particle mass scale.

Abstract

We discuss effective models derived from a supersymmetric model whose mediation mechanism of supersymmetry (SUSY) breaking is namely mirage mediation. In this model, light higgsino mass, that is required by the natural realization of the electroweak scale, is achieved by the unification of the soft SUSY breaking parameters at the low scale. Besides, we find that extra Higgs fields are also possibly light in some cases. Then, the effective model is a two Higgs doublet model (2HDM) with higgsinos, and it is distinguishable with namely type-II 2HDM which is widely discussed. In this paper, we study the mass spectrum of SUSY particles and the extra Higgs fields, and summarize the phenomenology in the effective model. We survey the current experimental bounds from the LHC and the dark matter experiments as well as the flavor physics. Then, we point out the expected mass scale of the SUSY particles and reveal the future prospects for the direct and indirect searches. We also discuss the difference between our effective model and the 2HDM in the bottom-up approach.