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Leptogenesis from additional Higgs doublets

Björn Garbrecht

  • Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, 52056 Aachen, Germany

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Phys. Rev. D 85, 123509 – Published 4 June, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.123509

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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Phys. Rev. D 85, 123509– Published 4 June, 2012
  • Received 30 January 2012

© 2012 American Physical Society

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