Abstract

Radiative muon capture by nuclei is analyzed by means of sum rule techniques, providing a total photon yield calculated with RPA precision. The measured yields relative to the ordinary muon capture rate are well reproduced for the nuclei 12C, 16O and 40Ca using a value of the pseudoscalar weak coupling constant g P enhanced by only 25% with respect to its canonical value. Therefore, the large renormalization of g P claimed up to now must be reconsidered.

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