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First results from the CERN Axion Solar Telescope (CAST)

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arxiv hep-ex/0411033 v2 pith:BHJNUXUK submitted 2004-11-09 hep-ex astro-ph

First results from the CERN Axion Solar Telescope (CAST)

classification hep-ex astro-ph
keywords axionlimitcastfirstresultsaboveanalysisarguments
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Hypothetical axion-like particles with a two-photon interaction would be produced in the Sun by the Primakoff process. In a laboratory magnetic field (``axion helioscope'') they would be transformed into X-rays with energies of a few keV. Using a decommissioned LHC test magnet, CAST has been running for about 6 months during 2003. The first results from the analysis of these data are presented here. No signal above background was observed, implying an upper limit to the axion-photon coupling < 1.16 10^{-10} GeV^-1 at 95% CL for m_a <~0.02 eV. This limit is comparable to the limit from stellar energy-loss arguments and considerably more restrictive than any previous experiment in this axion mass range.

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Cited by 6 Pith papers

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

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    hep-ph 2026-04 unverdicted novelty 7.0

    Solar tachocline production of symmetrons yields a keV-scale flux at Earth whose absorption in xenon detectors provides new complementary bounds on symmetron parameter space.

  2. Axion-like Particle Search with a Light-Shining-Through-Walls Setup at a $\gamma$-$\gamma$ Collider

    hep-ph 2025-12 conditional novelty 6.0

    A light-shining-through-walls search using a gamma-gamma collider's inverse-Compton photon beam could reach g_aγγ ≈ 3.8e-5 GeV^-1 for m_a < 0.1 eV.

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    Axion-photon oscillations generate bipartite mode entanglement with maximal values at resonance, and quantum speed limits are derived for both axion-photon and neutrino systems.

  4. Dimming of Photon Ring due to Photon-Axion Conversion around Kerr Black Holes

    gr-qc 2026-05 unverdicted novelty 5.0

    Photon-axion conversion near Kerr black holes produces dimming of photon spectral luminosity that increases with black hole spin, magnetic field strength, and photon-axion coupling, most efficiently at high frequencies.

  5. Spatial resolution studies with the BabyIAXO Micromegas prototype

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    The IAXO-D1 Micromegas prototype achieves 100 to 300 micrometer spatial resolution at 5 to 10 keV, below the 1 mm BabyIAXO requirement, with simulations matching the measurements.

  6. Hunting for Axions in REactor neutrino COherent scattering Detection Experiment

    hep-ph 2025-09 conditional novelty 4.0

    RECODE, a reactor experiment with two germanium detectors, could probe axion-photon and axion-electron couplings into the cosmological triangle region at masses around 0.3 to 0.9 MeV.