Year: 2006
Type: article
Abstract: The quantity ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}\ensuremath{\xi}$, where $\ensuremath{\xi}$ is one of the muon decay parameters and ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}$ is the degree of muon polarization in pion decay, has been measured. The value ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}\ensuremath{\xi}=1.0003\ifmmode\pm\else\textpm\fi{}0.0006(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}0.0038(\mathrm{syst}.)$ was obtained. This result agrees with previous measurements but is over a factor of 2 more precise. It also agrees with the Standard Model prediction for ${P}_{\ensuremath{\mu}}^{\ensuremath{\pi}}\ensuremath{\xi}$ and thus leads to restrictions on left-right symmetric models.
Authors: B. Jamieson, R. Bayes, Yu. I. Davydov, P. Depommier, J. Doornbos, W. Faszer, M. C. Fujiwara, C. A. Gagliardi, A. Gaponenko, D. R. Gill, P. Gumplinger, M. D. Hasinoff, R. S. Henderson, J. Hu, P. Kitching, D. D. Koetke, J. A. Macdonald, R. P. MacDonald, G. M. Marshall, E. L. Mathie, R. E. Mischke, J. R. Musser, M. Nozar, K. Olchanski, A. Olin, R. Openshaw, T. A. Porcelli, J.-M. Poutissou, R. Poutissou, M. A. Quraan, N. L. Rodning, V. Selivanov, G. Sheffer, B. Shin, T. D. S. Stanislaus, R. Tacik, V. D. Torokhov, R. E. Tribble, M. A. Vasiliev
Institutions: University of British Columbia, TRIUMF, University of Victoria, Kurchatov Institute, Université de Montréal, Texas A&M University, University of Alberta, University of Saskatchewan, Valparaiso University, University of Regina, Lawrence Berkeley National Laboratory, University of Manitoba, Arkansas Tech University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2056833489