MEASUREMENTS OF THE ANTINEUTRINO SPIN ASYMMETRY IN BETA-DECAY OF THE NEUTRON AND RESTRICTIONS ON THE MASS OF A RIGHT-HANDED GAUGE BOSON

被引：48

作者：

KUZNETSOV, IA

SEREBROV, AP

STEPANENKO, IV

ALDUSCHENKOV, AV

LASAKOV, MS

KOKIN, AA

MOSTOVOI, YA

YEROZOLIMSKY, BG

DEWEY, MS

机构：

[1] IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,RUSSIA

[2] HARVARD UNIV,DEPT PHYS,CAMBRIDGE,MA 02138

[3] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.75.794

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 281 GeV/c(2) (90% C.L.). This is in agreement with restrictions from muon decay and direct searches for an additional vector boson W'.

引用

页码：794 / 797

页数：4

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