Electroweak supersymmetry in the NMSSM

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 1 TeV. In the next to minimal supersymmetric Standard Model, we perform the systematic ${\ensuremath{\chi}}^{2}$ analyses on parameter space scan for three EWSUSY scenarios: (I) $R$-parity conservation and one dark matter candidate, (II) $R$-parity conservation and multicomponent dark matter, (III) $R$-parity violation. We obtain the minimal ${\ensuremath{\chi}}^{2}/(\mathrm{\text{degree of freedom}})$ 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 preferred by the muon anomalous magnetic moment has been excluded except for the parameter space with moderate to large $\mathrm{tan}\ensuremath{\beta}(\ensuremath{\gtrsim}8)$. Especially, the most favorable parameter space has relatively large $\mathrm{tan}\ensuremath{\beta}$, moderate $\ensuremath{\lambda}$, small ${\ensuremath{\mu}}_{\mathrm{eff}}$, 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 $\ensuremath{\sim}450\text{ }\text{ }\mathrm{GeV}$ 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.