对 mu+-> e+ gamma 衰变存在性的新限制
高能物理 - 实验
2013-04-25 v2 仪器与探测器
摘要
本文展示了对总计 个靶上停止μ子的组合数据集的分析，旨在寻找轻子味破坏衰变 。由保罗谢勒研究所 (Paul Scherrer Institut) 的 MEG 实验收集的数据显示，相对于背景预期没有多余事件，并给出了该衰变分支比的新上限为 （90% 置信水平）。这代表比此前由 MEG 设定的世界最佳限制严格了四倍。
引用
@article{arxiv.1303.0754,
title = {New constraint on the existence of the mu+-> e+ gamma decay},
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 A. Graziosi and D. N. Grigoriev and T. Haruyama and M. Hildebrandt and Y. Hisamatsu and F. Ignatov and T. Iwamoto and D. Kaneko and P. -R. Kettle and B. I. Khazin and N. Khomotov and O. Kiselev and A. Korenchenko and N. Kravchuk and G. Lim and A. Maki and S. Mihara and W. Molzon and T. Mori and D. Mzavia and R. Nardo and H. Natori and D. Nicolo 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 E. Ripiccini 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 Z. You and Yu. V. Yudin and D. Zanello},
journal= {arXiv preprint arXiv:1303.0754},
year = {2013}
}
备注
5 pages, 3 figures, a version accepted in Phys. Rev. Lett