TeV scale mirage mediation in NMSSM

TL;DR

This paper explores the TeV scale mirage mediation mechanism within the NMSSM, demonstrating how it can naturally produce a 125 GeV Higgs and alleviate fine-tuning issues in electroweak symmetry breaking.

Contribution

It introduces a scenario where the mirage mediation at TeV scale yields realistic Higgs and superparticle masses with reduced fine-tuning in the NMSSM.

Findings

Lightest Higgs mass naturally reaches 125 GeV

Fine-tuning in electroweak symmetry breaking is reduced

Light higgsino and singlino form the LSP

Abstract

We study the next-to-minimal supersymmetric standard model. We consider soft supersymmetry breaking parameters, which are induced by the mirage mediation mechanism of supersymmetry breaking. We concentrate on the mirage mediation, where the so-called mirage scale is the TeV scale. In this scenario, we can realize the up-type Higgs soft mass of O(200) GeV, while other masses such as gaugino masses and stop masses are heavy such as 1 TeV or more. Cancellation between the effective \mu-term and the down-type Higgs soft mass ameliorates the fine-tuning in the electroweak symmetry breaking even for \mu=O(500) GeV. The mixing between the doublet and singlet Higgs bosons is suppressed by (\lambda/\kappa)/tan\beta. Then the lightest doublet Higgs mass naturally reaches 125 GeV lifted by the new quartic coupling. The higgsino and singlino are light and their linear combination is the lightest superparticle.