低能下π± p微分截面
核实验
2014-11-18 v1
摘要
在19.9至43.3 MeV之间的五个能量上测量了π⁻ p与π⁺ p弹性散射的微分截面。利用TRIUMF的CHAOS磁谱仪，并辅以用于抑制μ子本底的范围望远镜，可同时覆盖大部分全角范围，从而允许非常精确的相对截面测量。绝对归一化以5%的典型精度确定。这通过同时测量μ子质子弹性散射得以验证。所测截面显示与相移分析预言存在一些偏差，特别是在大角度与低能处。由新数据我们确定了同位旋向前散射振幅的实部。
引用
@article{arxiv.nucl-ex/0512006,
title = {pi+- p differential cross sections at low energies},
author = {H. Denz and P. Amaudruz and J. T. Brack and J. Breitschopf and P. Camerini and J. L. Clark and H. Clement and L. Felawka and E. Fragiacomo and E. F. Gibson and N. Grion and G. J. Hofman and B. Jamieson and E. L. Mathie and R. Meier and G. Moloney and D. Ottewell and O. Patarakin and J. D. Patterson and M. M. Pavan and S. Piano and K. Raywood and R. A. Ristinen and R. Rui and M. E. Sevior and G. R. Smith and J. Stahov and R. Tacik and G. J. Wagner and F. von Wrochem and D. M. Yeomans},
journal= {arXiv preprint arXiv:nucl-ex/0512006},
year = {2014}
}
备注
13 pages, 5 figures. To appear in PLB