/ Experiment-HEP arXiv:0705.4576

The First result of the neutrino magnetic moment measurement in the GEMMA experiment

Beda, A.G. (Moscow, ITEP) ; Brudanin, V.B. (Dubna, JINR) ; Demidova, E.V. (Moscow, ITEP) ; Egorov, V.G. (Dubna, JINR) ; Gavrilov, M.G. (Moscow, ITEP) ; Shirchenko, M.V. (Dubna, JINR) ; Starostin, A.S. (Moscow, ITEP) ; Vylov, Ts. (Dubna, JINR)

Published in: Phys.Atom.Nucl.
Year: 2007
Vol.: 70
Page No: 1873-1884
Pages: 9

Abstract: The first result of the neutrino magnetic moment measurement at the Kalininskaya Nuclear Power Plant (KNPP) with the GEMMA spectrometer is presented. An antineutrino-electron scattering is investigated. A high-purity germanium detector of 1.5 kg placed 13.9 m away from the 3 GW reactor core is used in the spectrometer. The antineutrino flux is $2.73\times 10^{13} \nu_e / cm^2 / s$. The differential method is used to extract the $\nu$-e electromagnetic scattering events. The scattered electron spectra taken in 6200 and 2064 hours for the reactor ON and OFF periods are compared. The upper limit for the neutrino magnetic moment $\mu_\nu < 5.8\times 10^{-11}$ Bohr magnetons at 90{%} CL is derived from the data processing.

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