Accidental Supersymmetric Dark Matter and Baryogenesis

Abstract

We show that "accidental" supersymmetry is a beyond-the-Standard Model framework that naturally accommodates a thermal relic dark matter candidate and successful electroweak baryogenesis, including the needed strongly first-order character of the electroweak phase transition. We study the phenomenology of this setup from the standpoint of both dark matter and baryogenesis. For energies around the electroweak phase transition temperature, the low-energy effective theory is similar to the MSSM with light super-partners of the third-generation quarks and of the Higgs and gauge bosons. We calculate the dark matter relic abundance and the baryon asymmetry across the accidental supersymmetry parameter space, including resonant and non-resonant CP-violating sources. We find that there are regions of parameter space producing both the observed value of the baryon asymmetry and a dark matter candidate with the correct relic density and conforming to present-day constraints from dark matter searches. This scenario makes sharp predictions for the particle spectrum, predicting a lightest neutralino mass between 200 and 500 GeV, with all charginos and neutralinos within less than a factor 2 of the lightest neutralino mass and the heavy Higgs sector within 20-25% of that mass, making it an interesting target for collider searches. In addition, we demonstrate that successful accidental supersymmetric dark matter and baryogenesis will be conclusively tested with improvements smaller than one order of magnitude to the current performance of electron electric dipole moment searches and of direct dark matter searches, as well as with IceCube plus Deep Core neutrino telescope data.

36 pages, 10 figures

References in corpus (21)

• Dark Matter Results from 225 Live Days of XENON100 Data
• An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
• Electroweak baryogenesis
• Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV
• Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC
• The Well-Tempered Neutralino
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• Search for the Standard Model Higgs boson in the diphoton decay channel with 4.9 fb-1 of pp collisions at sqrt(s) = 7 TeV with ATLAS
• Search for the standard model Higgs boson decaying into two photons in pp collisions at sqrt(s)=7 TeV
• Gravitational Waves from Warped Spacetime
• The Baryogenesis Window in the MSSM
• Electroweak Phase Transition and Baryogenesis in the nMSSM
• Search for the Standard Model Higgs boson in the decay channel H->ZZ(*)->4l with 4.8 fb-1 of pp collision data at sqrt(s) = 7 TeV with ATLAS
• A Confining Strong First-Order Electroweak Phase Transition
• Neutralino Dark Matter Detection in Split Supersymmetry Scenarios
• Search for a Higgs boson in the decay channel H to ZZ(*) to q qbar l-l+ in pp collisions at sqrt(s) = 7 TeV
• The Effective Theory of the Light Stop Scenario
• Higgs-Higgsino-Gaugino Induced Two Loop Electric Dipole Moments
• Yukawa and Tri-scalar Processes in Electroweak Baryogenesis
• Yukawa Interactions and Supersymmetric Electroweak Baryogenesis
• Supersymmetric Electroweak Baryogenesis Via Resonant Sfermion Sources

Cited by in corpus (5)

• Cosmic phase transitions: their applications and experimental signatures
• Prospects and Blind Spots for Neutralino Dark Matter
• Cosmological Phase Transitions and their Properties in the NMSSM
• Electroweak Baryogenesis And The Fermi Gamma-Ray Line
• Di-Higgs Production and Trilinear Higgs Self-Coupling in the scNMSSM: Qualitative Implications for the Electroweak Phase Transition at large λ and Low tan\b{eta}