Search for the electron-positron decay of axions and axionlike particles at a nuclear power reactor at Bugey

Altmann, M.; Déclais, Y.; Feilitzsch, F. von; Hagner, C.; Kajfasz, E.; Oberauer, L.

doi:10.1007/bf01566670

Cited by 31 publications

(45 citation statements)

References 27 publications

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“…The total energy of the axions can be fully converted by either of the two processes into measurable ionization energy in the HPGe, such that the experimental signatures are the presence of mono-energetic lines at the known E a 's during the Reactor ON periods. In comparison, previous reactor-based axion experiments studied instead the axion decay channels Γ γγ [10] or Γ ee [11]. They were therefore not sensitive to the invisible axion regime where m a are very small and decays are kinematically blocked or suppressed.…”

Section: Axion Detection and Experimental Setupmentioning

confidence: 97%

“…Its branching ratio (Γ a /Γ γ ) pn , as given by Eq. 15, is independent of (δ, β, η) and was used in previous reactor axion experiments [10,11,12]. The 7 Li * transition is also pre-dominantly M1.…”

Section: B Invisible Axion Modelsmentioning

confidence: 99%

“…The lack of sensitivities at "Int" for large g aγγ 20 GeV −1 and g aee 0.2 are due to axion interactions in the matter between reactor core and detector. Limits marked "R" and "Zn" are respectively from previous reactor experiments studying Γ γγ [10] or Γ ee [11] and the radioactive source experiment [2]. They were derived using the same modeling schemes on (Γ a /Γ γ ) as "KS".…”

Section: Model-dependent Limitsmentioning

confidence: 99%

“…The "KS" bounds are derived by fixing (Γa/Γγ )pn with the DFSZ model. Regions marked "R" was excluded by experiment studying Γee at reactors [11]. Bounds from othe experiments [23,27,28] are shown as colored blocks.…”

Section: Model-dependent Limitsmentioning

confidence: 99%

“…All previous reactor experiments [10,11] focused on the searches of the PQWW axions via their decays, and contributed much to exclude their existence. In this article, we present results on a new search over a broad axion mass range, using an alternative detection strategy through its interactions with matter.…”

Section: Introductionmentioning

confidence: 99%

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Search for axions from the Kuo-Sheng nuclear power reactor with a high-purity germanium detector

et al. 2007

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A search of axions produced in nuclear transitions was performed at the Kuo-Sheng Nuclear Power Station with a high-purity germanium detector of mass 1.06 kg at a distance of 28 m from the 2.9 GW reactor core. The expected experimental signatures were mono-energetic lines produced by their Primakoff or Compton conversions at the detector. Based on 459.0/96.3 days of Reactor ON/OFF data, no evidence of axion emissions were observed and constraints on the couplings gaγγ and gaee versus axion mass ma within the framework of invisible axion models were placed. The KSVZ and DFSZ models can be excluded for 10 4 eV ma 10 6 eV. Model-independent constraints on gaγγ · g 1 aNN < 7.7 × 10 −9 GeV −2 for ma 10 5 eV and gaee · g 1 aNN < 1.3 × 10 −10 for ma 10 6 eV at 90% confidence level were derived. This experimental approach provides a unique probe for axion mass at the keV−MeV range not accessible to the other techniques.

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Section: Axion Detection and Experimental Setupmentioning

confidence: 97%

Section: B Invisible Axion Modelsmentioning

confidence: 99%

Section: Model-dependent Limitsmentioning

confidence: 99%

Section: Model-dependent Limitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Search for axions from the Kuo-Sheng nuclear power reactor with a high-purity germanium detector

et al. 2007

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Constraints on a very light CP-odd Higgs of the NMSSM and other axion-like particles

Andreas

Lebedev

Ramos‐Sánchez

et al. 2010

J. High Energ. Phys.

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In the NMSSM, a light CP-odd Higgs arises due to spontaneous breaking of approximate symmetries such as Peccei-Quinn or R-symmetry and is motivated by string theory. The case when it is heavier than two muons is well studied and constrained. We analyze various meson decay, g − 2, beam dump and reactor bounds on the CP-odd Higgs with mass below the muon threshold, in particular, addressing the question how light a CP-odd Higgs can be. We find that it has to be heavier than 210 MeV or have couplings to fermions 4 orders of magnitude below those of the Standard Model Higgs. Our analysis applies more generally to couplings of a light pseudoscalar to matter.

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7Li solar axions: Preliminary results and feasibility studies

et al. 2008

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Search for the electron-positron decay of axions and axionlike particles at a nuclear power reactor at Bugey

Cited by 31 publications

References 27 publications

Search for axions from the Kuo-Sheng nuclear power reactor with a high-purity germanium detector

Search for axions from the Kuo-Sheng nuclear power reactor with a high-purity germanium detector

Constraints on a very light CP-odd Higgs of the NMSSM and other axion-like particles

7Li solar axions: Preliminary results and feasibility studies

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