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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Hauptverfasser:	Cao, Xiong-Hui, Li, Qu-Zhi, Zheng, Han-Qing
Format:	Artikel
Sprache:	eng
Schlagworte:	Physics - High Energy Physics - Phenomenology
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