Leptogenesis from additional Higgs doublets

Björn Garbrecht

doi:10.1103/PhysRevD.85.123509

Leptogenesis from additional Higgs doublets

Björn Garbrecht

RWTH Aachen University

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Leptogenesis may be induced by the mixing of extra Higgs doublets with experimentally accessible masses. This mechanism relies on diagrammatic cuts that are kinematically forbidden in the vacuum but contribute at finite temperature. A resonant enhancement of the asymmetry occurs generically provided the dimensionless Yukawa and self-interactions are suppressed compared to those of the standard model Higgs field. This is in contrast to typical scenarios of resonant leptogenesis, where the asymmetry is enhanced by imposing a degeneracy of singlet neutrino masses.

Original language	English
Article number	123509
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	85
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevD.85.123509
State	Published - 4 Jun 2012
Externally published	Yes

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10.1103/PhysRevD.85.123509

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title = "Leptogenesis from additional Higgs doublets",

abstract = "Leptogenesis may be induced by the mixing of extra Higgs doublets with experimentally accessible masses. This mechanism relies on diagrammatic cuts that are kinematically forbidden in the vacuum but contribute at finite temperature. A resonant enhancement of the asymmetry occurs generically provided the dimensionless Yukawa and self-interactions are suppressed compared to those of the standard model Higgs field. This is in contrast to typical scenarios of resonant leptogenesis, where the asymmetry is enhanced by imposing a degeneracy of singlet neutrino masses.",

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AB - Leptogenesis may be induced by the mixing of extra Higgs doublets with experimentally accessible masses. This mechanism relies on diagrammatic cuts that are kinematically forbidden in the vacuum but contribute at finite temperature. A resonant enhancement of the asymmetry occurs generically provided the dimensionless Yukawa and self-interactions are suppressed compared to those of the standard model Higgs field. This is in contrast to typical scenarios of resonant leptogenesis, where the asymmetry is enhanced by imposing a degeneracy of singlet neutrino masses.

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Leptogenesis from additional Higgs doublets

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