• Neutrino mass bounds from neutrinoless double beta-decays and cosmological probes

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      https://www.ias.ac.in/article/fulltext/pram/086/02/0437-0451

    • Keywords

       

      Neutrino masses; neutrinoless double beta decay; large-scale structures; interacting neutrino dark-energy model.

    • Abstract

       

      We investigate the way the total mass sum of neutrinos can be constrained from the neutrinoless double beta-decay and cosmological probes with cosmic microwave background (CMBR), large-scale structures including 2dFGRS and SDSS datasets. First we discuss, in brief, the current status of neutrino mass bounds from neutrino beta decays and cosmic constraint within the flat 𝛬CMD model. In addition, we explore the interacting neutrino dark-energy model, where the evolution of neutrino masses is determined by quintessence scalar field, which is responsible for cosmic acceleration. Assuming the flatness of the Universe, the constraint we can derive from the current observation is 𝛴𝑚𝜈 < 0.87 eV at 95% confidence level, which is consistent with 𝛴𝑚𝜈 < 0.68 eV in the flat 𝛬CDM model without Lyman alpha forest data. In the presence of Lyman-𝛼 forest data, interacting dark-energy models prefer a weaker bound 𝛴𝑚𝜈 < 0.43 eV to 𝛴𝑚𝜈 < 0.17 eV (Seljark et al). Finally, we discuss the future prospect of the neutrino mass bound with weak-lensing effects.

    • Author Affiliations

       

      Yong-Yeon Keum1

      1. Institute of Basic Science, Seoul National University, 1 Kwan-Ak-Ro, Kwan-Ak-Gu, Seoul, Republic of Korea
    • Dates

       
  • Pramana – Journal of Physics | News

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