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Title: Electroweak baryogenesis and dark matter from a singlet Higgs

Abstract

If the Higgs boson H couples to a singlet scalar S via λ{sub m}|H|{sup 2}S{sup 2}, a strong electroweak phase transition can be induced through a large potential barrier that exists already at zero temperature. In this case properties of the phase transition can be computed analytically. We show that electroweak baryogenesis can be achieved using CP violation from a dimension-6 operator that couples S to the top-quark mass, suppressed by a new physics scale that can be well above 1 TeV. Moreover the singlet is a dark matter candidate whose relic density is ∼<3% of the total dark matter density, but which nevertheless interacts strongly enough with nuclei (through Higgs exchange) to be just below the current XENON100 limits. The DM mass is predicted to be in the range 80–160 GeV.

Authors:
 [1];  [2]
  1. Department of Physics, McGill University, 3600 Rue University, Montréal, Québec, H3A 2T8 Canada (Canada)
  2. Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014 Jyväskylä (Finland)
Publication Date:
OSTI Identifier:
22279604
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; COSMOLOGY; CP INVARIANCE; DENSITY; HIGGS BOSONS; HIGGS MODEL; NONLUMINOUS MATTER; PHASE TRANSFORMATIONS; POTENTIALS; REST MASS; SCALARS; T QUARKS; TEV RANGE

Citation Formats

Cline, James M., and Kainulainen, Kimmo. Electroweak baryogenesis and dark matter from a singlet Higgs. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/01/012.
Cline, James M., & Kainulainen, Kimmo. Electroweak baryogenesis and dark matter from a singlet Higgs. United States. https://doi.org/10.1088/1475-7516/2013/01/012
Cline, James M., and Kainulainen, Kimmo. Tue . "Electroweak baryogenesis and dark matter from a singlet Higgs". United States. https://doi.org/10.1088/1475-7516/2013/01/012.
@article{osti_22279604,
title = {Electroweak baryogenesis and dark matter from a singlet Higgs},
author = {Cline, James M. and Kainulainen, Kimmo},
abstractNote = {If the Higgs boson H couples to a singlet scalar S via λ{sub m}|H|{sup 2}S{sup 2}, a strong electroweak phase transition can be induced through a large potential barrier that exists already at zero temperature. In this case properties of the phase transition can be computed analytically. We show that electroweak baryogenesis can be achieved using CP violation from a dimension-6 operator that couples S to the top-quark mass, suppressed by a new physics scale that can be well above 1 TeV. Moreover the singlet is a dark matter candidate whose relic density is ∼<3% of the total dark matter density, but which nevertheless interacts strongly enough with nuclei (through Higgs exchange) to be just below the current XENON100 limits. The DM mass is predicted to be in the range 80–160 GeV.},
doi = {10.1088/1475-7516/2013/01/012},
url = {https://www.osti.gov/biblio/22279604}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 01,
volume = 2013,
place = {United States},
year = {2013},
month = {1}
}