EPJ Web of Conferences (Jan 2020)

Low-energy pion-nucleon scattering and the Δ resonance in lattice QCD

  • Alexandrou Constantia,
  • Koutsou Giannis,
  • Krieg Stefan,
  • Leskovec Luka,
  • Meinel Stefan,
  • Negele John W.,
  • Paul Srijit,
  • Petschlies Marcus,
  • Pochinsky Andrew,
  • Rendon Gumaro,
  • Silvi Giorgio,
  • Syritsyn Sergey

DOI
https://doi.org/10.1051/epjconf/202024102006
Journal volume & issue
Vol. 241
p. 02006

Abstract

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We report on our investigation of low-energy pion-nucleon scattering from lattice QCD with Wilson type fermions. Our focus is on the isospin I = 3/2 channel, which couples to the Delta resonance. We discuss our calculations aiming at the extraction of the Delta resonance mass, width and effective coupling at pion mass 250 MeV, using the Lüscher finite-volume method to extract the phase shift δJ=3/2,l=1.