WG4 The Final Measurement of the Muon Decay Parameters from the TWIST Experiment

Not scheduled

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).

Primary author

Dr Ryan Bayes (University of Glasgow)

Co-author

Gersende Prior (Universite de Geneve (CH))

Presentation Materials

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