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Probing the axion-nucleon coupling with the next generation of axion helioscopes

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arxiv 2111.06407 v2 pith:E6SES57K submitted 2021-11-11 hep-ph astro-ph.SRhep-ex

Luca Di Luzio , Javier Galan , Maurizio Giannotti , Igor G. Irastorza , Joerg Jaeckel , Axel Lindner , Jaime Ruz , Uwe Schneekloth
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Lukas Sohl Lennert J. Thormaehlen Julia K. Vogel
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classification hep-phastro-ph.SRhep-ex
keywords axionaxionscouplingaxion-nucleonbabyiaxoiaxosensitivitysolar
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A finite axion-nucleon coupling, nearly unavoidable for QCD axions, leads to the production of axions via the thermal excitation and subsequent de-excitation of Fe-57 isotopes in the sun. We revise the solar bound on this flux adopting the up to date emission rate, and investigate the sensitivity of the proposed International Axion Observatory IAXO and its intermediate stage BabyIAXO to detect these axions. We compare different realistic experimental options and discuss the model dependence of the signal. Already BabyIAXO has sensitivity far beyond previous solar axion searches via the nucleon coupling and IAXO can improve on this by more than an order of magnitude.

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Forward citations

Cited by 5 Pith papers

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

  1. Solar axion searches with RES-NOVA: projected sensitivity and first prototype limit

    hep-ex 2026-07 conditional novelty 6.0 of 10

    RES-NOVA's projected 1 ton-year sensitivity reaches within a factor of ~2 of XENONnT on the solar-axion electron coupling, and a 32.4 g-day archaeological-lead prototype excludes new parts of the (g_ae, g_aγ) plane.

  2. Axion lines from nuclear de-excitations in galactic stellar populations

    hep-ph 2025-09 conditional novelty 6.0 of 10

    No 14.4 keV axion line from 57Fe de-excitations is seen by NuSTAR toward M87, M82, M31, or the Galactic Center, yielding |g_ann x g_aγγ| < 1.1e-22 GeV^-1 for m_a < 1e-10 eV.

  3. Axion-induced pair production: a new strategy for axion detection

    hep-ph 2024-11 conditional novelty 6.0 of 10

    Axion-induced pair production in a nuclear electric field is the dominant detection channel for axions above roughly 10 MeV and substantially improves projected supernova axion sensitivities.

  4. Experiments to test the hypothesis for solar and dark matter axions

    hep-ph 2025-07 unverdicted novelty 1.0 of 10

    This is a pedagogical review of haloscope and helioscope experiments searching for dark matter and solar axions, with an overview of near-future technological developments.

  5. Status and Perspectives on Axion Searches

    hep-ph 2024-12 conditional

    A concise review of axion and ALP search experiments, their recent limits, and upcoming projects.

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