학술논문
Measurement of P_{mu}xi in Polarized Muon Decay
Document Type
Working Paper
Author
TWIST Collaboration; Jamieson, B.; Bayes, R.; Davydov, Yu. I.; Depommier, P.; Doornbos, J.; Faszer, W.; Fujiwara, M. C.; Gagliardi, C. A.; Gaponenko, A.; Gill, D. R.; Gumplinger, P.; Hasinoff, M. D.; Henderson, R. S.; Hu, J.; Kitching, P.; Koetke, D. D.; Macdonald, J. A.; MacDonald, R. P.; Marshall, G. M.; Mathie, E. L.; Mischke, R. E.; Musser, J. R.; Nozar, M.; Olchanski, K.; Olin, A.; Openshaw, R.; Porcelli, T. A.; Poutissou, J. -M.; Poutissou, R.; Quraan, M. A.; Rodning, N. L.; Selivanov, V.; Sheffer, G.; Shin, B.; Stanislaus, T. D. S.; Tacik, R.; Torokhov, V. D.; Tribble, R. E.; Vasiliev, M. A.
Source
Phys.Rev.D74:072007,2006
Subject
Language
Abstract
The quantity P_{mu}^{pi}xi, where xi is one of the muon decay parameters and $P_{\mu}^{\pi}$ is the degree of muon polarization in pion decay, has been measured. The value P_{mu}^{pi}xi = 1.0003 +- 0.0006 stat. +- 0.0038 syst. was obtained. This result agrees with previous measurements but is over a factor of two more precise. It also agrees with the Standard Model prediction for P_{mu}^{pi}xi and thus leads to restrictions on left-right symmetric models.
Comment: 11 pages, 7 figures, Phys. Rev. D 74, 072007 (2006) Final version
Comment: 11 pages, 7 figures, Phys. Rev. D 74, 072007 (2006) Final version