Measurement of the Michel parameter rho in muon decay

by Musser, James Raymond

Abstract (Summary)
The TWIST Collaboration has measured the Michel parameter rho in normal muon decay,u+ -> e+VeVu. In the standard model of particle physics,rho = 3/4. Deviations from this value require mixing of left- and right-handed muon and electron couplings in the muon-decay Lagrangian. We find rho = 0:75080+-0:00032(stat.)+-0:00097(syst.) +- 0:00023, where the last uncertainty represents the dependence of rho on the Michel parameter n. This result sets new limits on the WL - WR mixing angle in left-right symmetric models.
Bibliographical Information:

Advisor:Gagliardi, Carl; Ko, Che-Ming; Tribble, Robert; Yennello, Sherry

School:Texas A&M University

School Location:USA - Texas

Source Type:Master's Thesis

Keywords:michel rho muon


Date of Publication:12/01/2005

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