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Título

Baryogenesis through split Higgsogenesis

AutorDavidson, Sacha; González Felipe, Ricardo; Serodio, Hugo ; Silva, Joao P.
Palabras claveHiggs Physics
CP violation
Fecha de publicación12-nov-2013
EditorSpringer
CitaciónJournal of High Energy Physics 11 (11): 100 - 22 (2013)
ResumenWe 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.
Versión del editorhttp://dx.doi.org/10.1007/JHEP11(2013)100
URIhttp://hdl.handle.net/10261/125106
DOI10.1007/JHEP11(2013)100
ISSN1029-8479
E-ISSN1029-8479
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