MEG实验中的缪子极化：预测与测量
高能物理 - 实验
2016-04-29 v2 仪器与探测器
摘要
MEG实验利用世界上强度最高的低能缪子束之一，以寻找轻子味破坏过程。我们通过测量米歇尔衰变正电子角分布的不对称性随能量的变化，确定了薄阻止靶处的剩余束流极化。标准模型（SM）在无质量中微子情况下预言产生处的初始缪子束极化应为。我们估计在阻止靶处的剩余缪子极化为，当考虑到缪子产生、传播和在靶中慢化期间发生的去极化效应时，这与SM预言一致。束流极化的知识对于建模由缪子辐射衰变引起的我们的搜索的本底具有根本重要性。
引用
@article{arxiv.1510.04743,
title = {Muon polarization in the MEG experiment: predictions and measurements},
author = {A. M. Baldini and Y. Bao and E. Baracchini and C. Bemporad and F. Berg and M. Biasotti and G. Boca and P. W. Cattaneo and G. Cavoto and F. Cei and G. Chiarello and C. Chiri and A. De Bari and M. De Gerone and A. DÓnofrio and S. Dussoni and Y. Fujii and L. Galli and F. Gatti and F. Grancagnolo and M. Grassi and A. Graziosi and D. N. Grigoriev and T. Haruyama and M. Hildebrandt and Z. Hodge and K. Ieki and F. Ignatov and T. Iwamoto and D. Kaneko and T. I. Kang and P. R. Kettle and B. I. Khazin and N. Khomutov and A. Korenchenko and N. Kravchuk and G. M. A. Lim and S. Mihara and W. Molzon and T. Mori and A. Mtchedlishvili and S. Nakaura and D. Nicolò and H. Nishiguchi and M. Nishimura and S. Ogawa and W. Ootani and M. Panareo and A. Papa and A. Pepino and G. Piredda and G. Pizzigoni and A. Popov and F. Renga and E. Ripiccini and S. Ritt and M. Rossella and G. Rutar and R. Sawada and F. Sergiampietri and G. Signorelli and G. Tassielli and F. Tenchini and Y. Uchiyama and M. Venturini and C. Voena and A. Yamamoto and K. Yoshida and Z. You and Y. V. Yudin},
journal= {arXiv preprint arXiv:1510.04743},
year = {2016}
}