EPJ Web Conf.
Volume 241, 2020The 12th International Workshop on the Physics of Excited Nucleons (NSTAR 2019)
|Number of page(s)||7|
|Published online||22 September 2020|
Low-energy pion-nucleon scattering and the Δ resonance in lattice QCD
1 Computation-based Science and Technology Research Center, The Cyprus Institute
2 Department of Physics, University of Cyprus, POB 20537, 1678 Nicosia, Cyprus
3 Faculty of Mathematics und Natural Sciences, University of Wuppertal
4 Institute for Advanced Simulation, Forschungszentrum Jülich GmbH, Jülich 52425, Germany
5 Theory Center, Jefferson Lab, Newport News, VA 23606, USA
6 Department of Physics, University of Arizona, Tucson, AZ 85721, USA
7 Center for Theoretical Physics, Massachusetts Institute of Technology
8 Helmholtz-Institut für Strahlen- und Kernphysik
9 Bethe-Center for Theoretical Physics
10 Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794, USA
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Published online: 22 September 2020
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.
© The Authors, published by EDP Sciences, 2020
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