Natural Supersymmetry from Extra Dimensions

TL;DR

This paper demonstrates that natural supersymmetry can be realized in a five-dimensional framework with Scherk-Schwarz supersymmetry breaking, addressing key issues like the gluino-sucks problem and the $__$ problem, and naturally producing a Higgs spectrum consistent with LHC data.

Contribution

It introduces a five-dimensional supersymmetric model with Scherk-Schwarz breaking that naturally solves several longstanding problems in supersymmetry models.

Findings

Sub-TeV stops are easily accommodated.

The $__$ problem is absent in this setup.

The Higgs spectrum is naturally split for certain twists, aligning with LHC observations.

Abstract

We show that natural supersymmetry can be embedded in a five-dimensional theory with supersymmetry breaking \`a la Scherk-Schwarz (SS). There is no 'gluino-sucks' problem for stops localized in the four-dimensional brane and gluinos propagating in the full five-dimensional bulk, and sub-TeV stops are easily accommodated. The $\mu / B_\mu$ problem is absent as well; the SS breaking generates a Higgsino Dirac mass and no bilinear Higgs mass parameter in the superpotential is required. Moreover, for non-maximal SS twists leading to $\tan \beta \simeq 1$, the Higgs spectrum is naturally split, in agreement with LHC data. The 125-GeV Higgs mass and radiative electroweak symmetry breaking can be accommodated by minimally extending the Higgs sector with $Y=0$ $SU(2)_L$ triplets.