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arxiv: 0904.2103 · v4 · submitted 2009-04-14 · ✦ hep-ex

Search for solar axion emission from 7Li and D(p,gamma)3He nuclear decays with the CAST gamma-ray calorimeter

CAST Collaboration: S. Andriamonje , S. Aune , D. Autiero , K. Barth , A. Belov , B. Beltran , H. Brauninger , J. M. Carmona
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S. Cebrian J. I. Collar T. Dafni M. Davenport L. Di. Lella C. Eleftheriadis J. Englhauser G. Fanourakis E. Ferrer. Ribas H. Fischer J. Franz P. Friedrich T. Geralis I. Giomataris S. Gninenko H. Gomez M. Hasinoff F. H. Heinsius D. H. H. Hoffmann I. G. Irastorza J. Jacoby K. Jakovcic D. Kang K. Konigsmann R. Kotthaus M. Krcmar K. Kousouris M. Kuster B. Lakic C. Lasseur A. Liolios A. Ljubicic G. Lutz G. Luzon D. W. Miller J. Morales A. Ortiz T. Papaevangelou A. Placci G. Raffelt H. Riege A. Rodriguez J. Ruz I. Savvidis Y. Semertzidis P. Serpico L. Stewart J. D. Vieira J. Villar J. Vogel L. Walckiers K. Zioutas
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classification ✦ hep-ex
keywords nuclearsearchaxioncalorimetercastemissiongammagamma-ray
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We present the results of a search for a high-energy axion emission signal from 7Li (0.478 MeV) and D(p,gamma)3He (5.5 MeV) nuclear transitions using a low-background gamma-ray calorimeter during Phase I of the CAST experiment. These so-called "hadronic axions" could provide a solution to the long-standing strong-CP problem and can be emitted from the solar core from nuclear M1 transitions. This is the first such search for high-energy pseudoscalar bosons with couplings to nucleons conducted using a helioscope approach. No excess signal above background was found.

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  1. Solar Axions from Nuclear Transitions

    hep-ph 2026-05 unverdicted novelty 3.0

    Solar axion fluxes from 57Fe and 83Kr nuclear transitions differ by three orders of magnitude, yielding stronger constraints on |g_aN^eff × g_aγγ| and g_aγγ vs. m_a from Chandrayaan-2 XSM data for iron.