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Title: Isocurvature constraints on portal couplings

Abstract

We consider portal models which are ultraweakly coupled with the Standard Model, and confront them with observational constraints on dark matter abundance and isocurvature perturbations. We assume the hidden sector to contain a real singlet scalar s and a sterile neutrino ψ coupled to s via a pseudoscalar Yukawa term. During inflation, a primordial condensate consisting of the singlet scalar s is generated, and its contribution to the isocurvature perturbations is imprinted onto the dark matter abundance. We compute the total dark matter abundance including the contributions from condensate decay and nonthermal production from the Standard Model sector. We then use the Planck limit on isocurvature perturbations to derive a novel constraint connecting dark matter mass and the singlet self coupling with the scale of inflation: m {sub DM}/GeV ∼< 0.2λ{sub s}{sup 3/8} ( H {sub *}/10{sup 11} GeV){sup −3/2}. This constraint is relevant in most portal models ultraweakly coupled with the Standard Model and containing light singlet scalar fields.

Authors:
; ;  [1]; ;  [2]
  1. Department of Physics, University of Jyväskylä, P.O.Box 35 (YFL), FI-40014 University of Jyväskylä (Finland)
  2. Department of Physics, University of Helsinki P.O. Box 64, FI-00014, Helsinki (Finland)
Publication Date:
OSTI Identifier:
22679681
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2016; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ABUNDANCE; CONDENSATES; COUPLING; DECAY; DISTURBANCES; GEV RANGE; INFLATIONARY UNIVERSE; MASS; NONLUMINOUS MATTER; PERTURBATION THEORY; PSEUDOSCALARS; SCALAR FIELDS; STANDARD MODEL; STERILE NEUTRINOS; VISIBLE RADIATION; WEAK-COUPLING MODEL; YUKAWA POTENTIAL

Citation Formats

Kainulainen, Kimmo, Nurmi, Sami, Vaskonen, Ville, Tenkanen, Tommi, and Tuominen, Kimmo, E-mail: kimmo.kainulainen@jyu.fi, E-mail: sami.t.nurmi@jyu.fi, E-mail: tommi.tenkanen@helsinki.fi, E-mail: kimmo.i.tuominen@helsinki.fi, E-mail: ville.vaskonen@jyu.fi. Isocurvature constraints on portal couplings. United States: N. p., 2016. Web. doi:10.1088/1475-7516/2016/06/022.
Kainulainen, Kimmo, Nurmi, Sami, Vaskonen, Ville, Tenkanen, Tommi, & Tuominen, Kimmo, E-mail: kimmo.kainulainen@jyu.fi, E-mail: sami.t.nurmi@jyu.fi, E-mail: tommi.tenkanen@helsinki.fi, E-mail: kimmo.i.tuominen@helsinki.fi, E-mail: ville.vaskonen@jyu.fi. Isocurvature constraints on portal couplings. United States. doi:10.1088/1475-7516/2016/06/022.
Kainulainen, Kimmo, Nurmi, Sami, Vaskonen, Ville, Tenkanen, Tommi, and Tuominen, Kimmo, E-mail: kimmo.kainulainen@jyu.fi, E-mail: sami.t.nurmi@jyu.fi, E-mail: tommi.tenkanen@helsinki.fi, E-mail: kimmo.i.tuominen@helsinki.fi, E-mail: ville.vaskonen@jyu.fi. Wed . "Isocurvature constraints on portal couplings". United States. doi:10.1088/1475-7516/2016/06/022.
@article{osti_22679681,
title = {Isocurvature constraints on portal couplings},
author = {Kainulainen, Kimmo and Nurmi, Sami and Vaskonen, Ville and Tenkanen, Tommi and Tuominen, Kimmo, E-mail: kimmo.kainulainen@jyu.fi, E-mail: sami.t.nurmi@jyu.fi, E-mail: tommi.tenkanen@helsinki.fi, E-mail: kimmo.i.tuominen@helsinki.fi, E-mail: ville.vaskonen@jyu.fi},
abstractNote = {We consider portal models which are ultraweakly coupled with the Standard Model, and confront them with observational constraints on dark matter abundance and isocurvature perturbations. We assume the hidden sector to contain a real singlet scalar s and a sterile neutrino ψ coupled to s via a pseudoscalar Yukawa term. During inflation, a primordial condensate consisting of the singlet scalar s is generated, and its contribution to the isocurvature perturbations is imprinted onto the dark matter abundance. We compute the total dark matter abundance including the contributions from condensate decay and nonthermal production from the Standard Model sector. We then use the Planck limit on isocurvature perturbations to derive a novel constraint connecting dark matter mass and the singlet self coupling with the scale of inflation: m {sub DM}/GeV ∼< 0.2λ{sub s}{sup 3/8} ( H {sub *}/10{sup 11} GeV){sup −3/2}. This constraint is relevant in most portal models ultraweakly coupled with the Standard Model and containing light singlet scalar fields.},
doi = {10.1088/1475-7516/2016/06/022},
journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 06,
volume = 2016,
place = {United States},
year = {2016},
month = {6}
}