Constraints on the axion-electron coupling for solar axions produced by a Compton process and bremsstrahlung
| Autor: | V. V. Muratova, A. S. Kayunov, D. A. Semenov, E. V. Unzhakov, A. V. Derbin |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Nuclear and High Energy Physics Physics::Instrumentation and Detectors Astrophysics::High Energy Astrophysical Phenomena High Energy Physics::Phenomenology Hadron Bremsstrahlung Compton scattering FOS: Physical sciences Elementary particle High Energy Physics - Experiment Baryon High Energy Physics - Phenomenology High Energy Physics::Theory High Energy Physics - Experiment (hep-ex) Particle decay High Energy Physics - Phenomenology (hep-ph) Astrophysics - Solar and Stellar Astrophysics Atomic physics Nucleon Axion Solar and Stellar Astrophysics (astro-ph.SR) |
| Zdroj: | Physical Review D. 83 |
| ISSN: | 1550-2368 1550-7998 |
| DOI: | 10.1103/physrevd.83.023505 |
| Popis: | The search for solar axions produced by Compton ($\gamma+e^-\rightarrow e^-+A$) and bremsstrahlung-like ($e^-+Z \rightarrow Z+e^-+A$) processes has been performed. The axion flux in the both cases depends on the axion-electron coupling constant. The resonant excitation of low-lying nuclear level of $^{169}\rm{Tm}$ was looked for: $A+^{169}$Tm $\rightarrow ^{169}$Tm$^*$ $\rightarrow ^{169}$Tm $+ \gamma$ (8.41 keV). The Si(Li) detector and $^{169}$Tm target installed inside the low-background setup were used to detect 8.41 keV $\gamma$-rays. As a result, a new model independent restriction on the axion-electron and the axion-nucleon couplings was obtained: $g_{Ae}\times|g^0_{AN}+ g^3_{AN}|\leq 2.1\times10^{-14}$. In model of hadronic axion this restriction corresponds to the upper limit on the axion-electron coupling and on the axion mass $g_{Ae}\times m_A\leq3.1\times10^{-7}$ eV (90% c.l.). The limits on axion mass are $m_A\leq$ 105 eV and $m_A\leq$ 1.3 keV for DFSZ- and KSVZ-axion models, correspondingly (90% c.l.). Comment: 7 pages, 4 figures |
| Databáze: | OpenAIRE |
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