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Constraints on Axion-Lepton coupling from Big Bang Nucleosynthesis

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arxiv 2007.01873 v2 pith:A5LL55DA submitted 2020-07-03 hep-ph astro-ph.CO

Diptimoy Ghosh , Divya Sachdeva This is my paper · ORCID
classification hep-phastro-ph.CO
keywords bangboundcouplingmassnucleosynthesisalp-electronalpsarticle
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In this article, we study the implications of the coupling between Axion-Like-Particles (ALPs) and Leptons to cosmology, in particular, the Big Bang Nucleosynthesis (BBN). We show that the BBN, through the constraint on the effective number of relativistic neutrino species, provides the most stringent bound on the ALP-electron interaction strength for the mass of axion between 20 keV and 1 MeV. For other values of the mass, the BBN bound complements the stellar-evolution and laboratory bounds.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. MeV Electrophilic Axion-like Particles from Sun

    hep-ph 2026-07 conditional novelty 6.0 of 10

    MeV axion-like particles could be made when 5.5 MeV solar fusion photons Compton-scatter off electrons; current LZ, PandaX-4T and Borexino data would then constrain g_ae to (1.7-3.7)e-6 in the 0.4-1 MeV window.

  2. Improved cosmological constraints on axion-lepton interactions

    hep-ph 2025-11 conditional novelty 6.0 of 10

    For axion masses above 0.1 eV, cosmology provides the strongest known limits on axion couplings to muons, taus, and flavor-violating tau channels, excluding decay constants up to 10^8 GeV.

  3. Neutrino masses from large-scale structures: future sensitivity and theory dependence

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Forecasted 1-sigma sensitivity to the sum of neutrino masses is 15 meV for Planck+DESI and 7 meV for CMB-S4+MegaMapper, with the one-loop bispectrum providing 10% and 30% of the constraining power.

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