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Axion emission from supernova with axion-pion-nucleon contact interaction

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arxiv 2110.01972 v2 pith:H4BFPUQF submitted 2021-10-05 hep-ph

classification hep-ph
keywords rightarrowaxioncontactinteractionaxion-pion-nucleonprocessesemissionsupernovae
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abstract

We examine the axion emission from supernovae with a complete set of relevant axion couplings including the axion-pion-nucleon contact interaction which was ignored in the previous studies. Two processes are affected by the axion-pion-nucleon contact interaction, $\pi^-+p \rightarrow n + a$ and $n+p\rightarrow n+p+a$, and these processes can be the dominant source of axions for some region in the axion parameter space or in astrophysical conditions encountered inside supernovae. We find that the contact interaction can enhance the axion emissivity of $\pi^-+p \rightarrow n + a$ by a factor of $2-4$, while the effect on $n+p\rightarrow n+p+a$ is not significant. We also discuss the relative importance of other pion-induced processes such as $\pi^0+n\rightarrow n+a$ and $\pi^-+\pi^0\rightarrow \pi^-+a$.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. In-flight positron annihilation as a probe of feebly interacting particles

    hep-ph 2025-01 conditional novelty 6.0 of 10

    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...

  2. Disentangling axion-like particle couplings to nucleons via a delayed signal in Super-Kamiokande from a future supernova

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A future nearby supernova could reveal sub-MeV axion-like particles through a delayed ~30 MeV photon signal in Super-Kamiokande and Hyper-Kamiokande, probing couplings down to about 3 x 10^-6.

  3. Probing a diffuse flux of axion-like particles from galactic supernovae with neutrino water Cherenkov detectors

    hep-ph 2024-12 conditional novelty 6.0 of 10

    MeV-mass axion-like particles from galactic supernovae can form a diffuse flux detectable via a p -> p gamma in water Cherenkov detectors, and Super-Kamiokande data exclude a new region of the ALP parameter space.

  4. Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments

    hep-ph 2026-03 conditional novelty 2.0 of 10

    The meV axion window is presented as a coherent, cross-validated search program in which string theory, stellar cooling, dark matter, and new detector concepts converge on the same mass range.

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