A Big-Bang Nucleosynthesis Limit on the Neutral Fermion Decays into Neutrinos

Abstract

Using the primordial helium abundance, an upper limit to the magnetic moments for Dirac neutrinos had been provided by imposing restrictions on the number of the additional helicity states. Considering non-thermal photons produced in the decay of the heavy sterile mass eigenstates due to the neutrino magnetic moment, we explore the constraints imposed by the observed abundances of all the light elements produced during the Big Bang nucleosynthesis.

7 pages, 6 figures, minor corrections added, accepted for publication in PRD

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Cited by in corpus (14)

• Frontiers in Nuclear Astrophysics
• Updated BBN constraints on electromagnetic decays of MeV-scale particles
• A revised thermonuclear rate of ${}^7$Be($n$,$\alpha$)${}^4$He relevant to Big-Bang nucleosynthesis
• A loophole to the universal photon spectrum in electromagnetic cascades: application to the "cosmological lithium problem"
• General limit on the relation between abundances of D and ${}^7$Li in big bang nucleosynthesis with nucleon injections
• Majorana Neutrino Magnetic Moment and Neutrino Decoupling in Big Bang Nucleosynthesis
• Effects of Long-lived 10 MeV Scale Sterile Neutrino on Primordial Elemental Abundances and Effective Neutrino Number
• Impacts of Hawking Radiation from Primordial Black Holes in Critical Collapse Model on the Light Element Abundances
• On the relative velocity distribution for general statistics and an application to big-bang nucleosynthesis under Tsallis statistics
• Was Entropy Conserved between BBN and Recombination?
• Screening corrections to Electron Capture Rates and resulting constraints on Primordial Magnetic Fields
• Effects of sterile neutrino and extra-dimension on big bang nucleosynthesis
• Non-Thermal Cosmic Rays During Big Bang Nucleosynthesis to Solve the Lithium Problem
• Neutrinos in Astrophysics and Cosmology