π-N散射的Bethe-Salpeter方程求解
核理论
2009-10-31 v2
摘要
给出了基于四维Bethe-Salpeter方程的π-N散射的相对论描述。方程的核由s道和u道的核子与Δ极点图,以及t道的ρ和σ交换组成。通过Wick转动求解Bethe-Salpeter方程,并在高达360 MeV π介子实验室能量下对s波和p波相移获得了良好的拟合。由拟合确定的耦合常数与文献中普遍接受的值一致。
引用
@article{arxiv.nucl-th/9903058,
title = {Solution of the Bethe-Salpeter equation for pion-nucleon scattering},
author = {A. D. Lahiff and I. R. Afnan},
journal= {arXiv preprint arXiv:nucl-th/9903058},
year = {2009}
}
备注
34 pages, RevTeX; 7 figures. Several references added, a few typos corrected. Accepted for publication in Physical Review C