Abstract
The hyperbolic version of Roy-Steiner equation describing low energy πN 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 S11 channel is found located at \( \sqrt{s} \) = (918 ± 3) − i(163 ± 9) MeV.
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Cao, XH., Li, QZ. & Zheng, HQ. A possible subthreshold pole in S11 channel from πN Roy-Steiner equation analyses. J. High Energ. Phys. 2022, 73 (2022). https://doi.org/10.1007/JHEP12(2022)073
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DOI: https://doi.org/10.1007/JHEP12(2022)073