Two-step electroweak baryogenesis

Satoru Inoue, Grigory Ovanesyan, and Michael J. Ramsey-Musolf
Phys. Rev. D 93, 015013 – Published 22 January 2016

Abstract

We analyze electroweak baryogenesis during a two-step electroweak symmetry-breaking transition, wherein the baryon asymmetry is generated during the first step and preserved during the second. Focusing on the dynamics of CP violation required for asymmetry generation, we discuss general considerations for successful two-step baryogenesis. Using a concrete model realization, we illustrate in detail the viability of this scenario and the implications for present and future electric dipole moment (EDM) searches. We find that CP violation associated with a partially excluded sector may yield the observed baryon asymmetry while evading present and future EDM constraints.

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  • Received 15 September 2015

DOI:https://doi.org/10.1103/PhysRevD.93.015013

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsParticles & Fields

Authors & Affiliations

Satoru Inoue1,2, Grigory Ovanesyan1, and Michael J. Ramsey-Musolf1,3

  • 1Physics Department, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA
  • 2Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA
  • 3Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA

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Issue

Vol. 93, Iss. 1 — 1 January 2016

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