Abstract
A measurement of the photon asymmetry in radiative muon capture RMC on has been carried out at TRIUMF. Negative muons were stopped in a target and the resulting RMC photons were then converted by a 5-cm thick NaI detector placed immediately in front of our main NaI detector, a cylindrical crystal of diameter 46 cm and depth 51 cm. The data sample consisted of 5200 high-energy RMC photon candidates. Our measured value for the energy-averaged photon asymmetry is The extracted values for the induced pseudoscalar coupling constant based on this photon asymmetry measurement are utilizing the impulse approximation IA model, and in terms of the modified impulse approximation (MIA) model. The two extracted values, although both consistent with the Goldberger-Treiman value of are considerably different, indicating a significant theoretical model dependency.
- Received 6 January 2003
DOI:https://doi.org/10.1103/PhysRevC.68.034605
©2003 American Physical Society