Constraints on Axion-Lepton coupling from Big Bang Nucleosynthesis

Abstract

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.

arXiv commentMinor improvement in the bounds; references and some more existing bounds added

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Cited by in corpus (18)

• Flavor probes of axion-like particles
• Heavy Axion Opportunities at the DUNE Near Detector
• Updated BBN constraints on electromagnetic decays of MeV-scale particles
• Strong supernovae bounds on ALPs from quantum loops
• Cosmological constraints on decaying axion-like particles: a global analysis
• Cosmological Implications of Axion-Matter Couplings
• Bounds on boosted dark matter from direct detection: The role of energy-dependent cross sections
• Dark Matter, Muon Anomalous Magnetic Moment and the XENON1T Excess
• Blazar boosted Dark Matter -- direct detection constraints on ${\sigma }_{e\chi }$ : Role of energy dependent cross sections
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• Limits on ALP-neutrino couplings from loop-level processes
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• INTEGRAL, eROSITA and Voyager Constraints on Light Bosonic Dark Matter: ALPs, Dark Photons, Scalars, $B-L$ and $L_i-L_j$ Vectors
• Neutrino Mass Hierarchy and Axion--Lepton Couplings in a Minimal Flavored $\nu$KSVZ Model