Journal of High Energy Physics (Dec 2022)

A possible subthreshold pole in S 11 channel from πN Roy-Steiner equation analyses

  • Xiong-Hui Cao,
  • Qu-Zhi Li,
  • Han-Qing Zheng

DOI
https://doi.org/10.1007/JHEP12(2022)073
Journal volume & issue
Vol. 2022, no. 12
pp. 1 – 13

Abstract

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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 S 11 channel is found located at s $$ \sqrt{s} $$ = (918 ± 3) − i(163 ± 9) MeV.

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