TWIST: Precision Measurement of the Muon Decay Parameters
R.E. Mischke (for the TWIST collaboration)
TL;DR
The TWIST experiment achieved high-precision measurements of muon decay parameters, providing tighter constraints on physics beyond the Standard Model.
Contribution
This work presents the most precise measurements of muon decay parameters rho and delta, refining tests of the Standard Model and its extensions.
Findings
Measured rho with unprecedented precision
Measured delta with improved accuracy
Tighter constraints on new physics models
Abstract
The TWIST experiment has made a precision measurement of three of the decay parameters in muon decay. The newest results are rho = 0.75014 +-0.00017(stat) +-0.00044(sys) +-0.00011(eta) and delta = 0.75067 +-0.00030(stat) +-0.00067(sys). Together with previously published results, improved constraints on possible extensions of the electroweak Standard Model are derived.
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