1/N_c展开中的π介子电产生振幅关系
高能物理 - 唯象学
2009-10-29 v2
摘要
我们在QCD的1/N_c展开中推导了π介子电产生振幅的表达式，并从中得到了在所有能量下都成立的电磁多极振幅之间的线性关系。1/N_c中的领头阶关系与现有数据（尤其是在远离共振区）比较吻合，但次领头阶关系往往只提供很小或没有改进。
引用
@article{arxiv.0905.0122,
title = {Pion Electroproduction Amplitude Relations in the 1/N_c Expansion},
author = {Richard F. Lebed and Lang Yu},
journal= {arXiv preprint arXiv:0905.0122},
year = {2009}
}
备注
45 pages, pdflatex, contains multiple figures but .pdf file is < 4 MB. This version to appear in Phys. Rev. D, but has much better figure resolution. References greatly expanded, some additional discussion