A possible subthreshold pole in $S_{11}$ channel from $\pi N$ Roy-Steiner equation analyses
High Energy Physics - Phenomenology
2022-12-28 v3
Abstract
The hyperbolic version of Roy-Steiner equation describing low energy scatterings, with larger analyticity domain in the complex plane is solved. The numerical results on phase shifts of low partial waves are in agreement with that of Hoferichter et al. [Phys. Rept. 625 (2016) 1]. A subthreshold pole in channel is found located at ~MeV.
Cite
@article{arxiv.2207.09743,
title = {A possible subthreshold pole in $S_{11}$ channel from $\pi N$ Roy-Steiner equation analyses},
author = {Xiong-Hui Cao and Qu-Zhi Li and Han-Qing Zheng},
journal= {arXiv preprint arXiv:2207.09743},
year = {2022}
}
Comments
12 pages, 4 figures; Minor improvements in numerical results and discussions, conclusions unchanged, final version to appear in JHEP