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We report a new measurement of the neutron antineutrino spin asymmetry coefficient B in the beta decay of polarized neutrons. Combining results of measurements of the observed asymmetry PB0ex0ex=0ex0ex0.6617±0.0044 with measurements of the neutron beam polarization P0ex0ex=0ex0ex(66.88±0.22)%, we obtain the value B0ex0ex=0ex0ex0.9894±0.0083. This value implies that the mass of a hypothetical right-handed charged gauge boson in the left-right symmetric model of the weak interaction is greater than 281GeV/c² (90% C. L.). This is in agreement with restrictions from muon decay and direct searches for an additional vector boson W^'.
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Кузнецов et al. (1995) studied this question.
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