Speaker
Aniket Sen
(HISKP, University of Bonn)
Description
We investigate the parity odd $\Delta I = 1$ pion-nucleon coupling $h^1_\pi$ from lattice QCD. With the PCAC-based use of a parity-conserving effective Hamiltonian, we extract the coupling by determining the nucleon mass splitting arising from effective 4-quark interactions using the Feynman-Hellmann theorem. We present preliminary results of the mass shift for a $32^3 \times 64$ ensemble of $N_f = 2+1+1$ twisted mass fermions at pion mass 260 MeV and lattice spacing $a = 0.097 \; fm$.
Authors
Aniket Sen
(HISKP, University of Bonn)
Marcus Petschlies
(HISKP, Bonn University)
Mr
Nikolas Schlage
(HISKP, University of Bonn)
Carsten Urbach
(University of Bonn)
