GEMMA experiment: three years of the search for the neutrino magnetic moment

A.G. Beda; A.S. Starostin; D.V. Medvedev; E.V. Demidova; M.V. Shirchenko; Ts. Vylov; V.B. Brudanin; V.G. Egorov

arxiv: 0906.1926 · v1 · pith:7Y272DJGnew · submitted 2009-06-10 · ✦ hep-ex

GEMMA experiment: three years of the search for the neutrino magnetic moment

A.G. Beda , V.B. Brudanin , E.V. Demidova , V.G. Egorov , D.V. Medvedev , M.V. Shirchenko , A.S. Starostin , Ts. Vylov This is my paper

classification ✦ hep-ex

keywords magneticmomentneutrinogemmareactorscatteringspectrometerused

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The result of the 3-year neutrino magnetic moment measurement at the Kalinin Nuclear Power Plant with the GEMMA spectrometer is presented. Antineutrino-electron scattering is investigated. A high-purity germanium detector of 1.5 kg placed at a distance of 13.9 m from the 3 GW(th) reactor core is used in the spectrometer. The antineutrino flux is 2.7E13 1/scm/s. The differential method is used to extract (nu-e) electromagnetic scattering events. The scattered electron spectra taken in 5184+6798 and 1853+1021 hours for the reactor ON and OFF periods are compared. The upper limit for the neutrino magnetic moment < 3.2E-11 Bohr magneton at 90% CL is derived from the data processing.

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