中子 $\eta$ 介子的光生反应：截面与双极化可观测物理量 $E$
核实验
2017-04-12 v1
摘要
中子 介子光生反应的结果总结如下。实验是在波恩的电子加速器 ELSA 上使用 CBELSA/TAPS 探测器进行的，利用了 衰变。液氘靶用于测量总截面和角分布。结果证实了波恩和美因茨的 MAMI 设施早先关于 激发函数中存在窄结构的测量结果。当前的角分布显示出前后不对称性，这在以前未被观察到，但被包含额外窄 态的模型计算所预测。此外，分析了使用纵向极化氘代丁醇靶和圆偏振光子束获得的数据，以确定双极化可观测物理量 。两组数据一起也被用于提取依赖于螺旋性的截面 和 。 激发函数中的窄结构似乎与反应的螺旋性-1/2 分量相关联。
引用
@article{arxiv.1704.00634,
title = {Photoproduction of eta mesons from the neutron: cross sections and double polarization observable E},
author = {L. Witthauer and M. Dieterle and F. Afzal and A. V. Anisovich and B. Bantes and D. Bayadilov and R. Beck and M. Bichow and K. -T. Brinkmann and S. Böse and Th. Challand and V. Crede and H. Dutz and H. Eberhardt and D. Elsner and R. Ewald and K. Fornet-Ponse and St. Friedrich and F. Frommberger and Ch. Funke and St. Goertz and M. Gottschall and A. Gridnev and M. Grüner and E. Gutzınst and D. Hammann and Ch. Hammann and J. Hannappel and J. Hartmann and W. Hillert and Ph. Hoffmeister and Ch. Honisch and T. Jude and D. Kaiser and H. Kalinowsky and F. Kalischewski and S. Kammer and A. Käser and I. Keshelashvili and P. Klassen and V. Kleber and F. Klein and K. Koop and B. Krusche and M. Lang and I. Lopatin and Ph. Mahlberg and K. Makonyi and V. Metag and W. Meyer and J. Müller and J. Müllers and M. Nanova and V. Nikonov and D. Piontek and G. Reicherz and T. Rostomyan and A. Sarantsev and Ch. Schmidt and H. Schmieden and T. Seifen and V. Sokhoyan and K. Spieker and A. Thiel and U. Thoma and M. Urban and H. van Pee and N. K. Walford and D. Walther and Ch. Wendel and D. Werthmüller and A. Wilson and A. Winnebeck},
journal= {arXiv preprint arXiv:1704.00634},
year = {2017}
}