质子中性π介子光生中的双极化可观测量G
核实验
2017-02-01 v1
摘要
本文报道了在波恩的ELSA加速器上利用CBELSA/TAPS实验测量质子光生中的双极化可观测量G。可观测量G由线偏振光子与纵向极化质子的反应确定。偏振光子由适当取向的金刚石辐射体的轫致辐射产生。冻结自旋丁醇靶提供极化质子。数据覆盖光子能量范围617至1325 MeV以及宽角度范围。G的实验结果与Bonn-Gatchina (BnGa)、J\"ulich-Bonn (J\"uBo)、MAID和SAID分波分析的预测进行了比较。讨论了新数据对π介子光生多极子的意义。
引用
@article{arxiv.1604.02922,
title = {Double-polarization observable G in neutral-pion photoproduction off the proton},
author = {A. Thiel and H. Eberhardt and M. Lang 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 V. Crede and M. Dieterle and H. Dutz 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. Gutz 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 I. Keshelashvili and P. Klassen and V. Kleber and F. Klein and E. Klempt and K. Koop and B. Krusche and M. Kube 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 S. Reeve and G. Reicherz and S. Runkel and A. Sarantsev and Ch. Schmidt and H. Schmieden and T. Seifen and V. Sokhoyan and K. Spieker and U. Thoma and M. Urban and H. van Pee and D. Walther and Ch. Wendel and A. Wilson and A. Winnebeck and L. Witthauer},
journal= {arXiv preprint arXiv:1604.02922},
year = {2017}
}