[Triumf-seminars] TRIUMF Seminar, Wed 2005-03-23 at 10:00

[postmaster@ADMIN.TRIUMF.CA]

Date/Time: Wed 2005-03-23 at 10:00  

Location: Auditorium  

Speaker: Francoise Mulhauser (PSI/ U. of Illinois)  

Title: Precision muon lifetime and capture experiments at PSI  

Abstract: The MuLan experiment at the Paul Scherrer Institute will measure the lifetime of the positive muon with a precision of 1 ppm, giving a value of the Fermi coupling constant GF at the level of 0.5 ppm. Meanwhile, by measuring the observed lifetime of the negative muon in pure hydrogen, the MuCap experiment will determine the rate of muon capture, giving the proton's pseudoscalar coupling gp to 7%. This coupling can be calculated precisely from heavy baryon chiral perturbation theory and therefore permits a test of QCD's chiral symmetry. I will report on the significant achievements in 2004, when both experiments recorded first physics data, which should result in an improved precision on gp and GF.   

PLEASE NOTE REVISED TIME

Stimulants available 15 minutes before the talk.