Measurements of the anti-neutrino spin asymmetry in beta decay of the neutron and restrictions on the mass of a right-handed gauge boson
1995
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Abstract: (APS)
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 PB=0.6617±0.0044 with measurements of the neutron beam polarization P=(66.88±0.22)%, we obtain the value B=0.9894±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′.- n: semileptonic decay
- semileptonic decay: n
- spin: asymmetry
- asymmetry: spin
- n: polarization
- polarization: n
- gauge boson: right-handed
- gauge boson: mass
- mass: gauge boson
- symmetry: left-right
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