Abstract
A search for resonant absorption of the solar axion by 83Kr nuclei was performed using the proportional counter installed inside the low-background setup at the Baksan Neutrino Observatory. The obtained model independent upper limit on the combination of isoscalar and isovector axion-nucleon couplings |g3 − g0| ≤ 8.4 × 10−7 allowed us to set the new upper limit on the hadronic axion mass of mA ≤ 65 eV (95% C.L.) with the generally accepted values S=0.5 and z=0.56.
Highlights
If the axion exists, the Sun should be one of the most intense sources of these particles
In order to reduce the influence of edge effects on the collection of the charge, the ends of the anode wire were surrounded by copper tubes (3 mm in diameter and 38 mm in length), which were at the anode potential and excluded gas amplification in this region
The depth of 4900 m w.e., where the cosmic muon flux is reduced by ∼ 107 times in comparison to that above ground, and evaluated as (2.6 ± 0.09) × 10−9 cm−2s−1
Summary
The Sun should be one of the most intense sources of these particles. The aim of this work is to search for monochromatic axions with an energy of 9.4 keV emitted in the M1 transition in the 83Kr nuclei in the Sun [1]. Axions on the Earth can be detected in the inverse reaction of resonance absorption by detecting particles (γ- and X-ray photons, as well as conversion and Auger electrons) appearing at the decay of an excited nuclear level. The probability of the emission and subsequent absorption of axions depends only on the coupling constant with nucleons, which is minimally model dependent and is proportional to axionnucleon coupling constant (gAN ). The axion flux was calculated in [1] for the standard solar model BS05 [2] characterized by a highmetallicity [3].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
