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

doi:https://doi.org/10.1088/1475-7516/2015/09/066

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

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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:: Popa, L. A.

Publication Date:: 2015-09-01

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.

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                    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

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                    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.

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@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}

}

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