PoS - Proceedings of Science
Volume 430 - The 39th International Symposium on Lattice Field Theory (LATTICE2022) - Hadron Structure
Pion nucleon excited state effects in nucleon observables
F. Pittler*, C. Alexandrou, S. Bacchio, G. Koutsou, S. Paul and M. Petschlies
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Pre-published on: January 05, 2023
Published on: April 06, 2023

Precise calculations of nucleon structure properties such as charges and form factors require a more precise accounting of the contribution
of excited states in both the two and three point functions. Recently,
it was suggested that two-particle excited states that are suppressed in two-point
functions are enhanced in certain three point functions. Effective theory suggests that such an enhancement increases
for computations performed using simulations with physical pion mass.
We present results of our study then we include two-particle interpolating fields and perform a variatonal analysis to obtain
the energy levels in the $I=1/2,I_3=+1/2$ channel with simulations at the physical pion mass.
DOI: https://doi.org/10.22323/1.430.0120
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