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VOLUME 60 (1994) | ISSUE 5 | PAGE 311
New measurements of the antineutrino-spin asymmetry in Beta decay of the neutron and restriction for mass of WR
In this work we report on new results of measurements of neutron antineutrino— spin asymmetry coefficient В in beta decay of polarized neutrons. This work has been carried out on the polarized neutron vertical channel of the WWR-M reactor at PNPI (Gatchina). Prom results of measurements of the experimental asymmetry, x — BP ™ 0.6617± 0.0044, and from results of measurements of the beam polarization, Ρ (66.88 ± 0.22)%, the value of the antineutrino spin asymmetry coefficient was obtained: В ~ 0.9894 ± 0.0083. This allows us to place restrictions on M\vR : Mw„ > 282 Gev/c2 (90% C.L.). .