Electroweak Radiative Corrections to Muon Capture

Details Electroweak Radiative Corrections to Muon Capture Electroweak Radiative Corrections to Muon Capture

2007-04-30

arxiv.org/abs/0704.3968v1

Phys.Rev.Lett.99:032003,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages

Scientific paper

10.1103/PhysRevLett.99.032003

Electroweak radiative corrections to muon capture on nuclei are computed and found to be sizable. They enhance the capture rates for hydrogen and helium by 2.8% and 3.0% respectively. As a result, the value of the induced pseudoscalar coupling, g_P^exp, extracted from a recent hydrogen 1S singlet capture experiment is increased by about 21% to g_P^exp = 7.3 +/- 1.2 and brought into good agreement with the prediction of chiral perturbation theory, g_P^theory=8.2 +/- 0.2. Implications for helium capture rate predictions are also discussed.

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