The S-wave \Lambda\pi phase shift is not large
高能物理 - 唯象学
2009-10-31 v1 高能物理 - 实验
核理论
摘要
We study the strong interaction S-wave \Lambda\pi phase shift in the region of the \Xi mass in the framework of a relativistic chiral unitary approach based on coupled channels. All parameters have been previously determined in a fit to strangeness S= -1 S-wave kaon-nucleon data. We find 0^\circ \le \delta_0 \le 1.1^\circ in agreement with previous chiral perturbation theory calculations (or extensions thereof). We also discuss why a recent coupled channel K-matrix calculation gives a result for \delta_0 that is negative and much bigger in magnitude. We argue why that value should not be trusted.
关键词
引用
@article{arxiv.hep-ph/0011293,
title = {The S-wave \Lambda\pi phase shift is not large},
author = {Ulf-G. Meißner and José Antonio Oller},
journal= {arXiv preprint arXiv:hep-ph/0011293},
year = {2009}
}
备注
3 pages, REVTeX