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

Technical Report · Sun Sep 01 04:00:00 EDT 1985

DOI:https://doi.org/10.2172/5008431· OSTI ID:5008431

Stoker, D P

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

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5008431
• Report Number(s): LBL-20324; ON: DE86002870
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
ASYMMETRY
BASIC INTERACTIONS
BOSONS
CORRECTIONS
CURRENTS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DATA ANALYSIS
DECAY
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
ISOCHRONOUS CYCLOTRONS
LEPTONIC DECAY
LEPTONS
LIFETIME
LINEAR MOMENTUM
MASS
MASSLESS PARTICLES
MUONS
MUONS PLUS
NEUTRINOS
NUMERICAL DATA
PARTICLE DECAY
POSITRONS
RELAXATION
REST MASS
SPIN-SPIN RELAXATION
TRIUMF CYCLOTRON
WEAK INTERACTIONS
WEAK PARTICLE DECAY