Radiatively-driven natural supersymmetry at the LHC

Authors

Howard Baer, University of OklahomaFollow
Vernon Barger, University of WisconsinFollow
Peisi Huang, University of ChicagoFollow
Dan Michelson, University of OklahomaFollow
Azar Mustafayev, University of HawaiiFollow
Warintorn Sreethawong, Suranaree University of TechnologyFollow
Xerxes Tata, University of HawaiiFollow

Document Type

Article

Date of this Version

2013

Citation

JHEP12(2013)013

Comments

Copyright SISSA 2013

doi:10.1007/JHEP12(2013)013

Abstract

Radiatively-driven natural supersymmetry (RNS) potentially reconciles the Z and Higgs boson masses close to ∼ 100 GeV with gluinos and squarks lying beyond the TeV scale. Requiring no large cancellations at the electroweak scale in constructing M_Z = 91.2 GeV while maintaining a light Higgs scalar with m_h ≃ 125 GeV implies a sparticle mass spectrum including light higgsinos with mass ∼ 100−300 GeV, electroweak gauginos in the 300−1200 GeV range, gluinos at 1−4 TeV and top/bottom squarks in the 1-4 TeV range (probably beyond LHC reach), while first/second generation matter scalars can exist in the 5-30 TeV range (far beyond LHC reach). We investigate several characteristic signals for RNS at LHC14. Gluino pair production yields a reach up to [?] ∼ 1.7 TeV for 300 fb⁻¹. Wino pair production — pp → [?] and [?] - leads to a unique same-sign diboson (SSdB) signature accompanied by modest jet activity from daughter higgsino decays; this signature provides the best reach up to [?] ∼ 2.1 TeV within this framework. Wino pair production also leads to final states with (WZ → 3[?]) + [?] as well as 4[?] + [?] which give confirmatory signals up to [?] ∼ 1.4 TeV. Directly produced light higgsinos yield a clean, soft trilepton signature (due to very low visible energy release) which can be visible, but only for a not-too-small a [?] mass gap. The clean SSdB signal - as well as the distinctive mass shape of the dilepton mass distribution from [?] decays if this is accessible - will mark the presence of light higgsinos which are necessary for natural SUSY. While an e⁺e^- collider operating with [?] ~ 600 GeV should unequivocally reveal the predicted light higgsinos, the RNS model with m_1/2 [?] 1 TeV may elude all LHC14 search strategies even while maintaining a high degree of electroweak naturalness.