MEG实验对μ→eγ衰变的限制
高能物理 - 实验
2010-04-21 v2 高能物理 - 唯象学
摘要
在PSI进行的MEG实验基于最初三个月运行数据，对μ→eγ衰变进行了搜寻，给出了该衰变分支比的上限：BR(μ→eγ) < 2.8 × 10⁻¹¹ (90%置信水平)。该结果对应于通过超导正电子谱仪和900升液氙光子探测器，对约10¹⁴个静止μ子衰变产生的正电子和光子进行的测量。
引用
@article{arxiv.0908.2594,
title = {A limit for the mu -> e gamma decay from the MEG experiment},
author = {MEG collaboration and J. Adam and X. Bai and A. Baldini and E. Baracchini and A. Barchiesi and C. Bemporad and G. Boca and P. W. Cattaneo and G. Cavoto and G. Cecchet and F. Cei and C. Cerri and A. De Bari and M. De Gerone and T. Doke and S. Dussoni and J. Egger 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 D. Kaneko 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 R. Nardò 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 M. Schneebeli and F. Sergiampietri and G. Signorelli and S. Suzuki and C. Topchyan and V. Tumakov 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:0908.2594},
year = {2010}
}
备注
13 pages, 9 figures. v2: improved estimate of photon reconstruction efficiency