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Muons in supernovae: implications for the axion-muon coupling
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abstract
The high temperature and electron degeneracy attained during a supernova allow for the formation of a large muon abundance within the core of the resulting proto-neutron star. If new pseudoscalar degrees of freedom have large couplings to the muon, they can be produced by this muon abundance and contribute to the cooling of the star. By generating the largest collection of supernova simulations with muons to date, we show that observations of the cooling rate of SN 1987A place strong constraints on the coupling of axion-like particles to muons, limiting the coupling to $g_{a\mu} < 10^{-7.5}~\text{GeV}^{-1}$.
Forward citations
Cited by 8 Pith papers
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Cooling the Shock: New Supernova Constraints on Dark Photons
Resonant dark photon production in the gain layer of a core-collapse supernova can quench the neutrino-driven shock revival, yielding constraints that supersede the SN1987A cooling bound for masses around 0.1-0.4 MeV.
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Flavor-violating dark matter at MEG-II and Mu3e
Rare muon decays into a positron and two dark matter particles could let MEG-II and Mu3e probe lepton-flavor-violating dark matter interactions at TeV scales, with a radiative decay extending the reach to sub-MeV dark matter.
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Beyond thermal approximations: Precise cosmological bounds on Axion-Like Particles
Solving the momentum-dependent Boltzmann equation and propagating the exact non-thermal ALP spectrum into CMB analyses yields 95% limits f_a>1.63e6 GeV (e), 9.41e6 GeV (mu), 8.06e4 GeV (tau), and g_a_gamma<1.98e-8 GeV^-1.
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Constraints on Axion-Like Particles with the Silicon Detector at a Nuclear Reactor
New 90% C.L. limits on the ALP–photon coupling in the 0.1–100 keV range are derived from Connie and Atucha-II reactor data via plasmon excitation in silicon; a 30 kg·yr Oscura-style run could improve on NEON by about tenfold.
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In-flight positron annihilation as a probe of feebly interacting particles
In-flight annihilation of positrons produced by supernova feebly interacting particles gives the strongest astrophysical bounds on their electron couplings for masses of roughly 10-200 MeV, covering ALPs, sterile neut...
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Time-delayed gamma-ray signatures of heavy axions from core-collapse supernovae
No gamma-ray excess from four supernovae in Fermi-LAT data yields the strongest constraints yet on MeV-to-GeV heavy axions coupled to both QED and QCD.
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Heating the dark matter halo with dark radiation from supernovae
Even a few parts per million of supernova energy emitted as dark radiation could transform cuspy dwarf dark matter halos into cored ones, and observed core sizes bound how much energy can go to new particles.
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Hunting for Axions in REactor neutrino COherent scattering Detection Experiment
RECODE, a reactor experiment with two germanium detectors, could probe axion-photon and axion-electron couplings into the cosmological triangle region at masses around 0.3 to 0.9 MeV.
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