New limit on the mass of 9.4-keV solar axions emitted in an M1 transition in ${}^{83}$Kr nuclei

Abstract

A search for resonant absorption of the solar axion by ${}^{83}\mathrm{Kr}$ 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 $|g_3-g_0|\le 1.69\times 10^{-6}$ allowed us to set the new upper limit on the hadronic axion mass of $m_A\le 130$ eV (95\% C.L.) with the generally accepted values $S$=0.5 and $z$=0.56.

5 pages, 2 figures, Proceedings of the 10th Patras Workshop on Axions, WIMPs and WISP 29 June - 4 July 2014, CERN, Geneva, Switzerland