Precision muon lifetime and capture experiments at PSI

Details Precision muon lifetime and capture experiments at PSI Precision muon lifetime and capture experiments at PSI

2004-10-29

arxiv.org/abs/nucl-ex/0410042v2

Physics

Nuclear Physics

Nuclear Experiment

4 pages, 2 figures; proceedings of the 6th International Workshop on Neutrino Factories and Superbeams (NuFACT04), July 26-Aug

Scientific paper

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 for the Fermi coupling constant G_F 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 g_p to 7%. This coupling can be calculated precisely from heavy baryon chiral perturbation theory and therefore permits a test of QCD's chiral symmetry.

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