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Title: Search for right-handed currents by means of muon spin rotation

Abstract

A muon spin rotation (..mu..SR) technique has been used to place limits on right-handed weak currents in ..mu../sup +/ decay. A beam of almost 100% polarized 'surface' muons obtained from the TRIUMF M13 beamline was stopped in essentially non-depolarizing >99.99% pure metal foils. The ..mu../sup +/ spins were precessed by 70-G or 110-G transverse fields. Decay e/sup +/ emitted within 225 mrad of the beam direction and with momenta above 46 MeV/c were momentum-analyzed to 0.2%. Comparison of the ..mu..SR signal amplitude with that expected for (V-A) decay yields an endpoint asymmetry xiP..mu..delta/rho>0.9951 with 90% confidence. In the context of manifest left-right symmetric models with massless neutrinos the results imply the 90% confidence limits M(W/sub 2/)>381 GeV/c/sup 2/ and -0.057

Authors:
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
5008431
Report Number(s):
LBL-20324
ON: DE86002870
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Technical Report
Resource Relation:
Other Information: Thesis
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CURRENTS; ASYMMETRY; LEPTONIC DECAY; MUONS PLUS; CORRECTIONS; DATA ANALYSIS; EXPERIMENTAL DATA; INTERMEDIATE VECTOR BOSONS; LIFETIME; LINEAR MOMENTUM; NEUTRINOS; POSITRONS; REST MASS; SPIN-SPIN RELAXATION; TRIUMF CYCLOTRON; ACCELERATORS; ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; BASIC INTERACTIONS; BOSONS; CYCLIC ACCELERATORS; CYCLOTRONS; DATA; DECAY; ELEMENTARY PARTICLES; FERMIONS; INFORMATION; INTERACTIONS; INTERMEDIATE BOSONS; ISOCHRONOUS CYCLOTRONS; LEPTONS; MASS; MASSLESS PARTICLES; MUONS; NUMERICAL DATA; PARTICLE DECAY; RELAXATION; WEAK INTERACTIONS; WEAK PARTICLE DECAY; 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Stoker, D.P.. Search for right-handed currents by means of muon spin rotation. United States: N. p., 1985. Web. doi:10.2172/5008431.
Stoker, D.P.. Search for right-handed currents by means of muon spin rotation. United States. doi:10.2172/5008431.
Stoker, D.P.. Sun . "Search for right-handed currents by means of muon spin rotation". United States. doi:10.2172/5008431. https://www.osti.gov/servlets/purl/5008431.
@article{osti_5008431,
title = {Search for right-handed currents by means of muon spin rotation},
author = {Stoker, D.P.},
abstractNote = {A muon spin rotation (..mu..SR) technique has been used to place limits on right-handed weak currents in ..mu../sup +/ decay. A beam of almost 100% polarized 'surface' muons obtained from the TRIUMF M13 beamline was stopped in essentially non-depolarizing >99.99% pure metal foils. The ..mu../sup +/ spins were precessed by 70-G or 110-G transverse fields. Decay e/sup +/ emitted within 225 mrad of the beam direction and with momenta above 46 MeV/c were momentum-analyzed to 0.2%. Comparison of the ..mu..SR signal amplitude with that expected for (V-A) decay yields an endpoint asymmetry xiP..mu..delta/rho>0.9951 with 90% confidence. In the context of manifest left-right symmetric models with massless neutrinos the results imply the 90% confidence limits M(W/sub 2/)>381 GeV/c/sup 2/ and -0.057},
doi = {10.2172/5008431},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 1985},
month = {Sun Sep 01 00:00:00 EDT 1985}
}

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