Maximally Natural Supersymmetry

TL;DR

This paper proposes a 4D weak scale supersymmetric model derived from 5D theories with Scherk-Schwarz breaking, addressing common SUSY issues, predicting accessible particles at LHC13, and potentially linking to gravitational wave signals.

Contribution

It introduces a maximally natural supersymmetry model from 5D theories with Scherk-Schwarz breaking, reducing fine-tuning and predicting testable particles.

Findings

Heavy spectrum for most superpartners except third family sfermions

Higgs mass raised to 126 GeV by a new U(1)' interaction

Potential gravitational wave signals compatible with BICEP2

Abstract

We consider 4D weak scale theories arising from 5D supersymmetric (SUSY) theories with maximal Scherk-Schwarz breaking at a Kaluza-Klein (KK) scale of several TeV. Many of the problems of conventional SUSY are avoided. Apart from 3rd family sfermions the SUSY spectrum is heavy, with only ~50% tuning at a gluino mass of ~2TeV and a stop mass of ~650 GeV. A single Higgs doublet acquires a vacuum expectation value, so the physical Higgs is automatically Standard-Model-like. A new U(1)' interaction raises the Higgs mass to 126 GeV. For minimal tuning the associated Z', as well as the 3rd family sfermions, must be accessible to LHC13. A gravitational wave signal consistent with BICEP2 is possible if inflation occurs when the extra dimensions are small.