A possible subthreshold pole in $S_{11}$ channel from $\pi N$ Roy-Steiner equation analyses
The hyperbolic version of Roy-Steiner equation describing low energy $\pi N$ scatterings, with larger analyticity domain in the complex $s$ 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 subth...
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| Zusammenfassung: | The hyperbolic version of Roy-Steiner equation describing low energy $\pi N$
scatterings, with larger analyticity domain in the complex $s$ 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 $S_{11}$ channel is found located at $\sqrt{s}=(918 \pm 3)-i (163 \pm
9)$~MeV. |
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| DOI: | 10.48550/arxiv.2207.09743 |