Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-05-22
Phys.Lett.B434:147,1998
Physics
High Energy Physics
High Energy Physics - Experiment
11 pages, REVTeX, 4 eps figures included, submitted to PLB
Scientific paper
10.1016/S0370-2693(98)00766-7
We have searched for axions which could be produced in the solar core by exploiting their conversion to X rays in a strong laboratory magnetic field. The signature of the solar axion is an increase in the rate of the X rays detected in a magnetic helioscope when the sun is within its acceptance. From the absence of such a signal we set a 95% confidence level limit on the axion coupling to two photons $g_{a\gamma\gamma}\equiv 1/M < 6.0\times 10^{-10}$ GeV$^{-1}$, provided the axion mass $m_a<0.03$ eV. The limit on the coupling is factor 4.5 more stringent than the recent experimental result. This is the first experiment whose sensitivity to $g_{a\gamma\gamma}$ is higher than the limit constrained by the solar age consideration.
Inoue Yoshizumi
Minowa Makoto
Moriyama Shigetaka
Namba Toshio
Takasu Yuko
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