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Particle Physics from Stars
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Low-mass particles such as neutrinos, axions, other Nambu-Goldstone bosons and gravitons are produced in the hot and dense interior of stars. Therefore, astrophysical arguments constrain the properties of these particles in ways which are often complementary to cosmological arguments and to laboratory experiments. This review provides an update on the most important stellar-evolution limits and discusses them in the context of other information from cosmology and laboratory experiments.
Forward citations
Cited by 6 Pith papers
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Isochrone fitting of Galactic globular clusters - IX. Tip of the red-giant branch for 27 clusters and constraints on new particle physics
No anomalous energy loss is seen in the red-giant tips of 27 globular clusters, yielding g_ae < 3.8e-14 at 95% confidence, the strongest bound for axion-electron coupling below about 1 keV.
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Constraining axion quadratic couplings with the Hulse-Taylor binary system
Orbital timing of the Hulse-Taylor binary pulsar gives the strongest published limits on quadratic axion-muon couplings for axion masses below about 10^-12 eV, and complementary limits on axion-neutron and axion-elect...
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Steep Redshift Evolution of the Ionizing Escape Fraction at $z = 5$--$12$: Empirical Constraints and Comparison with Simulations
Empirical three-parameter fit to f_esc(M_h,z) yields steep redshift evolution with population-averaged escape fraction rising from ~2% at z=5 to ~9% at z=12.
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Stellar Superradiance and Low-Energy Absorption in Dense Nuclear Media
Collective nucleon scattering in neutron-star matter suppresses the effective absorption of ultralight bosons at the long wavelengths relevant for superradiance, weakening the link between stellar cooling bounds and s...
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Muonic Boson Limits: Supernova Redux
Supernova models yield coupling limits g_a ≲ 0.9×10^{-10} and g_φ ≲ 0.4×10^{-10} for masses above 100 keV from gamma-ray observations, plus stronger trapping-regime limits from explosion energy, that are difficult to ...
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Non-adiabatic transitions in the density matrix formalism
The paper derives a density-matrix perturbation formula for two-state non-adiabatic transitions that reproduces the Landau-Zener result only to first order.
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