Discovery potential for split supersymmetry with thermal dark matter

Abstract

Supersymmetric extensions of the Standard Model with scalar superpartners above 10 TeV are well motivated since the Higgs boson mass can be explained by quantum corrections while maintaining gauge coupling unification. If supersymmetry breaking is transmitted to gauginos via anomaly mediation, the gaugino masses are loop suppressed compared to scalar masses, and the lightest supersymmetric particle is the Higgsino or wino, which can be the dark matter. In this setup, we identify the regions of parameter space that reproduce the observed Higgs boson mass and the thermal abundance of dark matter. We analyze the effects of complex phases in the gaugino mass parameters on the electron electric dipole moment (EDM) and the dark matter scattering cross section. We find that, for scalar masses up to 10 PeV and any size of the complex phases, the model with Higgsino dark matter is within reach of planned experiments -- Advanced ACME via electron EDM and LUX-ZEPLIN via dark matter direct detection -- with complementary discovery potentials, and the model with wino dark matter is within reach of future electron EDM experiments.

9 pages, 6 figures

References in corpus (13)

• Cosmology and Astrophysics of Minimal Dark Matter
• The Well-Tempered Neutralino
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Relic densities including Sommerfeld enhancements in the MSSM
• Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• SUSY under siege from direct and indirect WIMP detection experiments
• Direct Search of Dark Matter in High-Scale Supersymmetry
• Discriminating dark matter candidates using direct detection
• A landscape solution to the SUSY flavor and CP problems
• The Race to Find Split Higgsino Dark Matter
• Nucleon decay in the R-parity violating MSSM
• Higgsino Dark Matter in Pure Gravity Mediated Supersymmetry

Cited by in corpus (1)

• Toward the ultimate reach of current imaging atmospheric Cherenkov telescopes and their sensitivity to TeV dark matter