Speaker
Dr
Ryan Bayes
(University of Glasgow)
Description
The TWIST (TRIUMF Weak Interaction Symmetry Test) has completed a measurement of the muon decay energy-angle spectrum with the best precision in the world [1]. This experiment consists of a simultaneous measurement of the parameters ρ, δ, and Pμξ, from highly polarized muons, to test the validity of the Standard Model (SM) in a purely leptonic interaction. The measurement of these parameters sets new limits on the fundamental coupling constants of the muon and extensions to the SM---such as left right symmetric models. The determination of the systematic uncertainties will be discussed as their control was a central concern for the experiment. The final TWIST results will be given and placed in context for physics beyond the SM.
[1] R. Bayes et al, Phys. Rev. Lett 106, 41802 (2011).
Author
Dr
Ryan Bayes
(University of Glasgow)
Co-author
Gersende Prior
(Universite de Geneve (CH))
