Search for Right-Handed Currents by Means of Muon Spin Rotation
1985; American Physical Society; Volume: 54; Issue: 17 Linguagem: Inglês
10.1103/physrevlett.54.1887
ISSN1092-0145
AutoresD. P. Stoker, Benjamin Balke, J. Carr, G. Gidal, A. Jodidio, K. A. Shinsky, H. Steiner, M. Strovink, Robert D. Tripp, B. Gobbi, C. J. Oram,
Tópico(s)Atomic and Subatomic Physics Research
ResumoA muon-spin-rotation technique has been used to place limits on right-handed currents in ${\ensuremath{\mu}}^{+}$ decay. The spins of polarized ${\ensuremath{\mu}}^{+}$ stopped in metal targets were precessed by 70-G or 110-G transverse fields. The muon-spin-rotation signal amplitude produced by high-momentum decay ${e}^{+}$ emitted near the beam direction implies $\frac{\ensuremath{\xi}{P}_{\ensuremath{\mu}}\ensuremath{\delta}}{\ensuremath{\rho}}>0.9955$ and $M({W}_{2})>370$ GeV (90% confidence), where ${W}_{2}$ is a predominantly right-handed gauge boson. The present result combined with our previous spin-held analysis yields $\frac{\ensuremath{\xi}{P}_{\ensuremath{\mu}}\ensuremath{\delta}}{\ensuremath{\rho}}>0.9966$ and $M({W}_{2})>400$ GeV.
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