Ferenc Pittler (Helmholtz-Institut für Strahlen- und Kernphysik)
Calculations of nucleon charges and form factors have reached a level
of precision requiring a more precise accounting of the contribution
of excited states in both the two and three point functions. Recently,
it was suggested that the excited states that are suppressed in two-point
function maybe enhanced in certain three point functions. Such an enhancement increases when using lattice simulations at the physical point where $\pi N$ states form a dense spectrum . In this work we include two hadron interpolating fields and perform a variatonal analysis to obtain the first few energy levels in the $I=1/2,I_3=+1/2$ channel at physical pion mass.
Constantia Alexandrou Ferenc Pittler (Helmholtz-Institut für Strahlen- und Kernphysik) Giannis Koutsou (The Cyprus Institute) Marcus Petschlies (Helmholtz-Instituts für Strahlen- und Kernphysik) Srijit Paul (Johannes Gutenberg University Mainz)