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Title: Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK

Abstract

Few independent detections of a weak X-ray line at an energy of ∼ 3.5 keV seen toward a number of astrophysical sites have been reported. If this signal will be confirmed to be the signature of decaying DM sterile neutrino with a mass of ∼ 7.1 keV, then the cosmological observables should be consistent with its properties. In this paper we make a coupled treatment of the weak decoupling, primordial nucleosynthesis and photon decoupling epochs in the sterile neutrino resonant production scenario, including the extra radiation energy density via N{sub eff}. We compute the radiation and matter perturbations including the full resonance sweep solution for ν{sub α}/ν-bar {sub α} → ν{sub s} flavor conversion in the expanding Universe.We show that the cosmological measurements are in agreement with subdominant Dark Matter sterile neutrino resonant production with following parameters (errors at 95% CL): mass m{sub ν{sub s}}=6.08 ± 3.22 keV, mixing angle sin{sup 2} 2θ < 5.61 × 10{sup −10}, lepton number per flavor L{sub 4} = 1.23 ± 0.04 (L{sub 4} ≡ 10{sup 4} L{sub ν{sub a}}) and sterile neutrino mass fraction f{sub ν{sub s}}< 0.078.Our results are in good agreement with the sterile neutrino resonant production parameters inferred in ref. [1] from the linear large scale structure constraints to produce full Dark Matter density.

Authors:
Publication Date:
OSTI Identifier:
22525331
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 09; 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; COSMIC PHOTONS; DECOUPLING; DISTURBANCES; ENERGY DENSITY; FLAVOR MODEL; KEV RANGE; LEPTON NUMBER; MASS; MIXING ANGLE; NONLUMINOUS MATTER; NUCLEOSYNTHESIS; UNIVERSE; VISIBLE RADIATION; X RADIATION

Citation Formats

Popa, L. A., and Tonoiu, D., E-mail: lpopa@spacescience.ro, E-mail: tonoiud@spacescience.ro. Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/09/066.
Popa, L. A., & Tonoiu, D., E-mail: lpopa@spacescience.ro, E-mail: tonoiud@spacescience.ro. Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK. United States. https://doi.org/10.1088/1475-7516/2015/09/066
Popa, L. A., and Tonoiu, D., E-mail: lpopa@spacescience.ro, E-mail: tonoiud@spacescience.ro. Tue . "Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK". United States. https://doi.org/10.1088/1475-7516/2015/09/066.
@article{osti_22525331,
title = {Subdominant Dark Matter sterile neutrino resonant production in the light of PLANCK},
author = {Popa, L. A. and Tonoiu, D., E-mail: lpopa@spacescience.ro, E-mail: tonoiud@spacescience.ro},
abstractNote = {Few independent detections of a weak X-ray line at an energy of ∼ 3.5 keV seen toward a number of astrophysical sites have been reported. If this signal will be confirmed to be the signature of decaying DM sterile neutrino with a mass of ∼ 7.1 keV, then the cosmological observables should be consistent with its properties. In this paper we make a coupled treatment of the weak decoupling, primordial nucleosynthesis and photon decoupling epochs in the sterile neutrino resonant production scenario, including the extra radiation energy density via N{sub eff}. We compute the radiation and matter perturbations including the full resonance sweep solution for ν{sub α}/ν-bar {sub α} → ν{sub s} flavor conversion in the expanding Universe.We show that the cosmological measurements are in agreement with subdominant Dark Matter sterile neutrino resonant production with following parameters (errors at 95% CL): mass m{sub ν{sub s}}=6.08 ± 3.22 keV, mixing angle sin{sup 2} 2θ < 5.61 × 10{sup −10}, lepton number per flavor L{sub 4} = 1.23 ± 0.04 (L{sub 4} ≡ 10{sup 4} L{sub ν{sub a}}) and sterile neutrino mass fraction f{sub ν{sub s}}< 0.078.Our results are in good agreement with the sterile neutrino resonant production parameters inferred in ref. [1] from the linear large scale structure constraints to produce full Dark Matter density.},
doi = {10.1088/1475-7516/2015/09/066},
url = {https://www.osti.gov/biblio/22525331}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 09,
volume = 2015,
place = {United States},
year = {2015},
month = {9}
}