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Updated: Jun 11, 2025
16:20
Hyperpolarized Xenon for NMR and MRI Applications
Published on: September 6, 2012
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Axion Emission from Strange Matter in Core-Collapse SNe
Maël Cavan-Piton1, Diego Guadagnoli1, Micaela Oertel2
1<a href="https://ror.org/010hz2d37">LAPTh</a>, <a href="https://ror.org/04gqg1a07">Université Savoie Mont-Blanc</a> et <a href="https://ror.org/02feahw73">CNRS</a>, 74941 Annecy, France.
Physical Review Letters
|October 7, 2024
Summary
Supernova neutrino burst duration constrains exotic particle cooling. This study quantifies axion cooling from strange matter in supernovae, providing new bounds on axion couplings.
Area of Science:
- Astrophysics
- Particle Physics
- Nuclear Physics
Background:
- Supernova neutrino bursts are sensitive to exotic cooling mechanisms.
- Axions are hypothetical particles that could be produced in dense, hot supernova cores.
- The role of strange matter in supernovae cooling is not fully understood.
Purpose of the Study:
- To quantitatively investigate the cooling effects of axions radiated from strange matter in supernovae.
- To include the full baryon and meson octets in calculations of axion emissivity.
- To derive new constraints on axion couplings based on supernova observations.
Main Methods:
- Calculation of axion emissivity from baryon-meson scatterings and baryon decays.
- Inclusion of diverse supernova thermodynamic conditions and equations of state with varying strangeness content.
- Analysis of axion-strange-strange and axion-down-strange couplings.
Main Results:
- First quantitative study of axion cooling from strange matter in supernovae.
- Derivation of the first bound on the axial axion-strange-strange coupling.
- Strongest existing bound on the axion-down-strange coupling, potentially as low as O(10^{-2}) for f_a=10^9 GeV.
Conclusions:
- Strange matter plays a significant role in axion-mediated cooling of supernovae.
- Observational data from supernova 1987A can effectively constrain axion properties.
- The study provides stringent limits on fundamental particle physics parameters using astrophysical observations.
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