6533b86dfe1ef96bd12ca9fc
RESEARCH PRODUCT
Baryogenesis through split Higgsogenesis
Sacha DavidsonJoão P. SilvaJoão P. SilvaHugo SerôdioRicardo González FelipeRicardo González Felipesubject
Particle physicsNuclear and High Energy PhysicsHiggs Physicsmedia_common.quotation_subjectHigh Energy Physics::LatticeFOS: Physical sciences01 natural sciencesAsymmetryStandard ModelHiggs sectorBaryon asymmetryHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciences010306 general physicsmedia_commonPhysics010308 nuclear & particles physicsElectroweak interactionHigh Energy Physics::PhenomenologyFísicaBaryogenesisHigh Energy Physics - PhenomenologyCP violation[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Higgs bosonCP violationHigh Energy Physics::Experimentdescription
We study the cosmological evolution of asymmetries in the two-Higgs doublet extension of the Standard Model, prior to the electroweak phase transition. If Higgs flavour-exchanging interactions are sufficiently slow, then a relative asymmetry among the Higgs doublets corresponds to an effectively conserved quantum number. Since the magnitude of the Higgs couplings depends on the choice of basis in the :Higgs doublet space, we attempt to formulate basis-independent out-of-equilibrium conditions. We show that an initial asymmetry between the fliggs scalars, which could be generated by GP violation in the :Higgs sector, will be transformed into a baryon asymmetry by the sphalerons, without the need of B - L violation. This novel mechanism of baryogenesis through (split) Higgsogenesis is exemplified with simple scenarios based on the out-of-equilibrium decay of heavy singlet scalar fields into the illiggs doublets.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-11-12 | Journal of High Energy Physics |