1. Radiative Muon Capture on Hydrogen and the Induced Pseudoscalar Coupling
- Author
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Jonkmans, G., Ahmad, S., Armstrong, D. S., Azuelos, G., Bertl, W., Blecher, M., Chen, C. Q., Depommier, P., Doyle, B. C., von Egidy, T., Gorringe, T. P., Gumplinger, P., Hasinoff, M. D., Healey, D., Larabee, A. J., Macdonald, J. A., McDonald, S. C., Munro, M., Poutissou, J. -M., Poutissou, R., Robertson, B. C., Sample, D. G., Saettler, E., Sigler, C. M., Taylor, G. N., Wright, D. H., and Zhang, N. S.
- Subjects
Nuclear Experiment ,High Energy Physics - Experiment - Abstract
The first measurement of the elementary process $\mu^- p \rightarrow \nu_{\mu} n \gamma$ is reported. A photon pair spectrometer was used to measure the partial branching ratio ($2.10 \pm 0.22) \times 10^{-8}$ for photons of k > 60 MeV. The value of the weak pseudoscalar coupling constant determined from the partial branching ratio is $g_p(q^{2}=-0.88m_{\mu}^2) = (9.8 \pm 0.7 \pm 0.3) \cdot g_a(0)$, where the first error is the quadrature sum of statistical and systematic uncertainties and the second error is due to the uncertainty in $\lambda_{op}$, the decay rate of the ortho to para $p \mu p$ molecule. This value of g_p is $\sim$1.5 times the prediction of PCAC and pion-pole dominance., Comment: 13 pages, RevTeX type, 3 figures (encapsulated postscript), submitted to Phys. Rev. Lett
- Published
- 1996
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