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Low-Energy Supernovae Severely Constrain Radiative Particle Decays

Canonical reference. 78% of citing Pith papers cite this work as background.

16 Pith papers citing it
Background 78% of classified citations
abstract

The hot and dense core formed in the collapse of a massive star is a powerful source of hypothetical feebly-interacting particles such as sterile neutrinos, dark photons, axion-like particles (ALPs), and others. Radiative decays such as $a\to2\gamma$ deposit this energy in the surrounding material if the mean free path is less than the radius of the progenitor star. For the first time, we use a supernova (SN) population with particularly low explosion energies as the most sensitive calorimeters to constrain this possibility. These SNe are observationally identified as low-luminosity events with low ejecta velocities and low masses of ejected $^{56}$Ni. Their low energies limit the energy deposition from particle decays to less than about 0.1 B, where $1~{\rm B~(bethe)}=10^{51}~{\rm erg}$. For 1-500 MeV-mass ALPs, this generic argument excludes ALP-photon couplings $G_{a\gamma\gamma}$ in the $10^{-10}$-$10^{-8}~{\rm GeV}^{-1}$ range.

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2026 12 2025 4

representative citing papers

Direct Detection of Millicharged Particles from Supernovae

hep-ph · 2026-06-09 · unverdicted · novelty 6.0

Calculations show millicharged particles from supernovae can produce over 10 electron-recoil events per year in major detectors for millicharge 10^{-9} and sub-MeV to MeV masses, improving SN cooling bounds by up to an order of magnitude.

Heavy Axion from a Confining Mirror GUT

hep-ph · 2026-05-27 · unverdicted · novelty 6.0

A mirror GUT model confines dynamically to produce a heavy axion solving the strong CP problem while allowing observable EDMs and a rich hidden sector.

Baryon Asymmetry from Electroweak-Symmetric Domain Walls

hep-ph · 2026-04-17 · conditional · novelty 6.0

Differences in filtering and delivery of rigid versus fragile dust to a planet-induced pressure bump reproduce carbonaceous chondrite compositions and ages in a single long-lived dust trap.

$L_\mu-L_\tau$ gauge bosons in beam dumps and supernovae

hep-ph · 2025-11-12 · unverdicted · novelty 5.0

Re-evaluation of sub-GeV Lμ-Lτ gauge boson constraints from beam-dump production modes and multiple supernova observables, highlighting differences from existing literature.

Flavor phenomenology of light dark particles

hep-ph · 2026-06-05 · unverdicted · novelty 2.0

Review surveying limits and prospects for flavor-violating decays of light axion-like particles, highlighting complementarity of lab, astro, and cosmo probes up to 10^12 GeV scales.

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Showing 16 of 16 citing papers.