Signals for CP Violation in Split Supersymmetry

Abstract

Split supersymmetry is characterized by relatively light chargino and neutralino sector and very heavy sfermion sector. We study the consequence of CP violation in this scenario by evaluating two-loop contributions to electric dipole moments of fermions from Higgs-photon as well as $W$-$W$ diagrams. These contributions add coherently and produce electron and neutron electric dipole moments close to present bounds. We then explore Higgs production at a photon-photon collider, and consider the feasibility of measuring CP violating $h\gamma \gamma$ coupling induced by chargino loops. Methods of enhancing the sensitivity are discussed. For lower chargino masses and lower Higgs boson masses, the effect of the CP violation can be observed with 90% confidence level significance.

14 pages, 4 figures; typos corrected, version submitted to PLB

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Cited by in corpus (15)

• The Well-Tempered Neutralino
• Higgsino Dark Matter in High-Scale Supersymmetry
• Electric Dipole Moments in Split Supersymmetry
• Large D-terms, hierarchical soft spectra and moduli stabilisation
• Higgsino Dark Matter or Not: Role of Disappearing Track Searches at the LHC and Future Colliders
• Fine-Tuning Implications of Direct Dark Matter Searches in the MSSM
• Naturalizing Supersymmetry with a Two-Field Relaxion Mechanism
• Cornering Higgsino: Use of Soft Displaced Track
• Split NMSSM with electroweak baryogenesis
• Non-minimal Split Supersymmetry
• Tachyonic Squarks in Split Supersymmetry
• Hunting long-lived gluinos at the Pierre Auger Observatory
• Distinguishing split supersymmetry in Higgs signals at the Large Hadron Collider
• Hadronic production and decays of Charginos and Neutralinos in Split Supersymmetry
• Refining the predictions of supersymmetric CP-violating models: A top-down approach