Speakers
Prof.
Alexander Derbin
(Petersburg Nuclear Physics Institute)Dr
Valentina Muratova
(Petersburg Nuclear Physics Institute)
Description
A search for resonant absorption of the solar axion by $^{83}\rm{Kr}$ nuclei is continued with the krypton proportional counter at the Baksan Neutrino Observatory. Such an absorption should lead to the excitation of low-lying nuclear energy level of $^{83}\rm{Kr}$: $A + ^{83}\rm{Kr} \rightarrow ^{83}\rm{Kr}^* \rightarrow ^{83}\rm{Kr} + \gamma~ \rm{(8.41 keV)}$. The obtained model independent upper limit on the combination of isoscalar and isovector axion-nucleon couplings $|g_3 - g_0|\leq 8.4\times 10^{-7}$ leads to a new upper limit on the hadronic (KSVZ) axion mass of $m_{A}\leq 65$ eV (95\% C.L.) with the generally accepted values $S$=0.5 and $z$=0.56. The resonant absorption of the Primakoff solar axions leads to constraint on the axion–photon coupling and axion mass $g_{A\gamma}\times m_A \leq 6.3\times 10^{-17}$ that corresponds to the upper limit on KSVZ axion mass $m_{A}\leq 14.3$ eV. For solar axions produced by Compton and bremsstrahlung like processes the limit on axion-electron coupling and KSVZ axion mass are $g_{Ae}\times m_A \leq 1.8\times 10^{-9}$~eV and $m_A\leq 98$ eV, correspondingly (all at 95\% C.L.).
Primary authors
Prof.
Alexander Derbin
(Petersburg Nuclear Physics Institute)
Dr
Valentina Muratova
(Petersburg Nuclear Physics Institute)
Co-authors
Dr
E.V. Unzhakov
(PNPI NRCKI)
Dr
I.S. Drachnev
(PNPI NRCKI)
Dr
S.P. Yakimenko
(INR RAS)
