Measurement of the Muon Decay Parameter delta
高能物理 - 实验
2020-10-26 v2
摘要
The muon decay parameter delta has been measured by the TWIST collaboration. We find delta = 0.74964 +- 0.00066(stat.) +- 0.00112(syst.), consistent with the Standard Model value of 3/4. This result implies that the product Pmuxi of the muon polarization in pion decay, Pmu, and the muon decay parameter xi falls within the 90% confidence interval 0.9960 < Pmuxi < xi < 1.0040. It also has implications for left-right-symmetric and other extensions of the Standard Model.
引用
@article{arxiv.hep-ex/0410045,
title = {Measurement of the Muon Decay Parameter delta},
author = {TWIST Collaboration and A. Gaponenko and R. Bayes and Yu. I. Davydov and P. Depommier and J. Doornbos and W. Faszer and M. C. Fujiwara and C. A. Gagliardi and D. R. Gill and P. Green and P. Gumplinger and M. D. Hasinoff and R. S. Henderson and J. Hu and B. Jamieson and P. Kitching and D. D. Koetke and A. A. Krushinsky and Yu. Yu. Lachin and J. A. Macdonald and R. P. MacDonald and G. M. Marshall and E. L. Mathie and L. V. Miasoedov and R. E. Mischke and J. R. Musser and P. M. Nord and M. Nozar and K. Olchanski and A. Olin and 7 and R. Openshaw and T. A. Porcelli and J. -M. Poutissou and R. Poutissou and M. A. Quraan and N. L. Rodning and V. Selivanov and G. Sheffer and B. Shin and F. Sobratee and T. D. S. Stanislaus and R. Tacik and V. D. Torokhov and R. E. Tribble and M. A. Vasiliev and D. H. Wright},
journal= {arXiv preprint arXiv:hep-ex/0410045},
year = {2020}
}
备注
Extended to 5 pages. Referee's comments answered