轻子味破坏衰变 μ → eγ 的新上限
高能物理 - 实验
2017-09-05 v4 高能物理 - 唯象学
摘要
我们基于对 MEG 探测器在 2009 年和 2010 年于 Paul Scherrer 研究所收集的数据的分析，给出了寻找轻子味破坏衰变 μ→eγ 的新结果。对组合数据样本（对应总共 1.8×10^14 次 μ 子衰变）的似然分析给出了 μ→eγ 衰变分支比在 90% 置信水平下的上限为 2.4×10^{-12}，这是迄今为止对该衰变存在性的最严格限制。
引用
@article{arxiv.1107.5547,
title = {New limit on the lepton-flavour violating decay mu -> e gamma},
author = {MEG collaboration and J. Adam and X. Bai and A. M. Baldini and E. Baracchini and C. Bemporad and G. Boca and P. W. Cattaneo and G. Cavoto and F. Cei and C. Cerri and A. de Bari and M. De Gerone and T. Doke and S. Dussoni and J. Egger and K. Fratini and Y. Fujii and L. Galli and G. Gallucci and F. Gatti and B. Golden and M. Grassi and D. N. Grigoriev and T. Haruyama and M. Hildebrandt and Y. Hisamatsu and F. Ignatov and T. Iwamoto and P. -R. Kettle and B. I. Khazin and O. Kiselev and A. Korenchenko and N. Kravchuk and A. Maki and S. Mihara and W. Molzon and T. Mori and D. Mzavia and H. Natori and D. Nicolò and H. Nishiguchi and Y. Nishimura and W. Ootani and M. Panareo and A. Papa and R. Pazzi and G. Piredda and A. Popov and F. Renga and S. Ritt and M. Rossella and R. Sawada and F. Sergiampietri and G. Signorelli and S. Suzuki and F. Tenchini and C. Topchyan and Y. Uchiyama and R. Valle and C. Voena and F. Xiao and S. Yamada and A. Yamamoto and S. Yamashita and Yu. V. Yudin and D. Zanello},
journal= {arXiv preprint arXiv:1107.5547},
year = {2017}
}
备注
5 pages, 2 figures, accepted for publication at Phys. Rev. Lett