SEARCH FOR RIGHT-HANDED CURRENTS IN THE DECAY CHAIN OF K+-]MU+NU(MU), MU+-]E+NU(E)NU(MU)

被引：7

作者：

AOKI, M

YAMAZAKI, T

IMAZATO, J

KAWASHIMA, Y

TANAKA, KH

TAKASAKI, M

HAYANO, RS

IWASAKI, M

OUTA, H

TAKADA, E

TAMURA, H

机构：

[1] NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN

[2] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

[3] UNIV TOKYO,BUNKYO KU,TOKYO 113,JAPAN

来源：

PHYSICAL REVIEW D | 1994年 / 50卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.50.69

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The asymmetry of positrons in the K+ --> mu+nu, mu+ --> e+nu(e)nu(mu)BAR decay chain was measured in a search for right-handed weak currents in DELTAS = 1 semileptonic decay. High-intensity low-background monoenergetic polarized muons of 236 MeV/c momentum resulting from kaon decay at rest were directly extracted from a primary production target which was hit by a proton beam of the KEK 12-GeV proton synchrotron. Muons were stopped iu a pure-aluminum plate, and the energy-integrated asymmetry of the decay positrons with respect to the incoming muon direction was determined to high precision. The observed asymmetry yielded xiP(mu) = -0.9996 +/- 0.0030(stat) +/- 0.0048(syst). This result revealed no evidence of right-handed currents in this kaon-decay chain, and set a stringent bound on the mass of the right-handed weak boson.

引用

页码：69 / 91

页数：23

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