来自4He的相干π°光生
核实验
2013-06-26 v1
摘要
在Δ能量范围内,利用两个衰变光子鉴别过程,以高统计和系统精度测量了来自4He的相干π°光生的微分截面和束流不对称性。实验在MAinz MIcrotron上使用TAPS光子谱仪和Glasgow/Mainz标记光子设施进行。若采用适当的Δ-核相互作用参数化,微分截面与基于DWIA的预言极为吻合。束流不对称性用准直相干轫致辐射的线偏振度解释。所预期的线偏振度随准直角减小而增加的趋势得到证实。在相干峰极大值处,与计算的吻合达到百分之几的精度水平。
引用
@article{arxiv.nucl-ex/9907020,
title = {Coherent \pi^\circ photoproduction from ^4He},
author = {F. Rambo and P. Achenbach and J. Ahrens and H. -J. Arends and R. Beck and S. J. Hall and V. Hejny and P. Jennewein and S. S. Kamalov and M. Kotulla and B. Krusche and V. Kuhr and R. Leukel and V. Metag and R. Novotny and V. Olmos de Leon and A. Schmidt and M. Schumacher and U. Siodlaczek and F. Smend and H. Str"oher and J. Weiss and F. Wissmann and M. Wolf},
journal= {arXiv preprint arXiv:nucl-ex/9907020},
year = {2013}
}
备注
22 pages, 6 figures