Constraining CP-Violating TGCs and Measuring W-Polarization at OPAL
I.Trigger (CERN)
TL;DR
This paper measures W boson polarization and CP-violating gauge couplings at OPAL, providing insights into W boson properties and testing Standard Model predictions at 189 GeV.
Contribution
It introduces a novel measurement of W polarization and CP-violating couplings using spin properties in W pair events at LEP.
Findings
Measured rates of different W polarization states
Set constraints on CP-violating TGCs
Compared results with Standard Model expectations
Abstract
A measurement of the polarization of W bosons in semi-leptonically decaying W pairs produced at 189 GeV is presented. Rates of longitudinally and transversely polarized W bosons and correlation between two W bosons are studied. The spin properties of the leptonically decaying W boson in the W pairs was used to measure the CP-violating trilinear gauge boson couplings. These results are compared with Standard Model expectations.
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Particle physics theoretical and experimental studies · Particle accelerators and beam dynamics