极化μ子衰变中宇称破坏的精确测量
高能物理 - 实验
2015-03-19 v2
摘要
我们利用极化μ子衰变,给出了弱相互作用中宇称破坏的一项新的高精度测量结果。TWIST 合作组测量了 ,其中 是π介子衰变中μ子的极化度, 描述μ子衰变中的内禀不对称性。我们得到 ,与标准模型预言的 吻合良好。我们的结果比 TWIST 之前的数值精确了 7 倍,为标准模型的左右对称电弱扩展设定了新限制。
引用
@article{arxiv.1104.3632,
title = {Precise measurement of parity violation in polarized muon decay},
author = {TWIST Collaboration and J. F. Bueno and R. Bayes and Yu. I. Davydov and P. Depommier and W. Faszer and C. A. Gagliardi and A. Gaponenko and D. R. Gill and A. Grossheim and P. Gumplinger and M. D. Hasinoff and R. S. Henderson and A. Hillairet and J. Hu and D. D. Koetke and R. P. MacDonald and G. M. Marshall and E. L. Mathie and R. E. Mischke and K. Olchanski and A. Olin and R. Openshaw and J. -M. Poutissou and R. Poutissou and V. Selivanov and G. Sheffer and B. Shin and T. D. S. Stanislaus and R. Tacik and R. E. Tribble},
journal= {arXiv preprint arXiv:1104.3632},
year = {2015}
}
备注
18 pages, 12 figures, published in Phys. Rev. D