Electroweak Supersymmetry (EWSUSY) in the NMSSM

TL;DR

This paper investigates Electroweak Supersymmetry within the NMSSM, performing parameter scans and analyses to identify viable models consistent with experimental constraints, and discusses prospects for future collider searches.

Contribution

It systematically analyzes three EWSUSY scenarios in the NMSSM using ^2 fits, identifying favored parameter regions and providing benchmark points for future collider tests.

Findings

Most parameter space with muon g-2 preference is excluded, except for moderate to large 8.

Favored models have large 8, moderate 9, small 4, heavy squarks/gluino, and a 125 GeV Higgs.

Wino mass bounds depend on smuon-Wino mass degeneracy, with exclusion up to 40 GeV.

Abstract

To explain all the available experimental results, we have proposed the Electroweak Supersymmetry (EWSUSY) previously, where the squarks and/or gluino are heavy around a few TeVs while the sleptons, sneutrinos, Bino, Winos, and/or Higgsinos are light within one TeV. In the Next to Minimal Supersymmetric Standard Model (NMSSM), we perform the systematic \chi^2 analyses on parameter space scan for three EWSUSY scenarios: (I) R-parity conservation and one dark matter candidate; (II) R-parity conservation and multi-component dark matter; (III) R-parity violation. We obtain the minimal \chi^2/(degree of freedom) of 10.2/15, 9.6/14, and 9.2/14 respectively for Scenarios I, II, and III. Considering the constraints from the LHC neutralino/chargino and slepton searches, we find that the majority of viable parameter space prefered by the muon anomalous magnetic moment has been excluded except for the parameter space with moderate to large \tan\beta (\ge 8). Especially, the most favorable parameter space has relatively large \tan\beta, moderate \lambda, small \mu_{eff}, heavy squarks/gluino, and the second lightest CP-even neutral Higgs boson with mass around 125 GeV. In addition, if the left-handed smuon is nearly degenerate with or heavier than Wino, there is no definite bound on Wino mass. Otherwise, the Wino with mass up to \sim 450 GeV has been excluded. Furthermore, we present several benchmark points for Scenarios I and II, and briefly discuss the prospects of the EWSUSY searches at the 14 TeV LHC and ILC.