6533b7d8fe1ef96bd126a518
RESEARCH PRODUCT
Electroweak baryogenesis and dark matter from a singlet Higgs
Kimmo KainulainenKimmo KainulainenJames M. Clinesubject
PhysicsParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)010308 nuclear & particles physicsPhysics beyond the Standard ModelDark matterElectroweak interactionHigh Energy Physics::PhenomenologyFOS: Physical sciencesAstronomy and Astrophysics01 natural sciencesBaryogenesisHigh Energy Physics - PhenomenologyHigh Energy Physics - Phenomenology (hep-ph)Baryon asymmetry0103 physical sciencesHiggs bosonCP violationInvariant massHigh Energy Physics::Experiment010306 general physicsAstrophysics - Cosmology and Nongalactic Astrophysicsdescription
If the Higgs boson H couples to a singlet scalar S via lambda_m |H|^2 S^2, a strong electroweak phase transition can be induced through a large potential barrier that exists already at zero temperature. In this case properties of the phase transition can be computed analytically. We show that electroweak baryogenesis can be achieved using CP violation from a dimension-6 operator that couples S to the top-quark mass, suppressed by a new physics scale that can be well above 1 TeV. Moreover the singlet is a dark matter candidate whose relic density is < 3% of the total dark matter density, but which nevertheless interacts strongly enough with nuclei (through Higgs exchange) to be just below the current XENON100 limits. The DM mass is predicted to be in the range 80-160 GeV.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-10-15 |