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Nucleon sigma terms with a variational analysis from Lattice QCD by Barca, Lorenzo; Bali, Gunnar; Collins, Sara is a scholarly article available to read on EtoBox.

What is Nucleon sigma terms with a variational analysis from Lattice QCD about?

We determine the nucleon-sigma terms from lattice QCD. We find that the dominant excited state contamination in the nucleon three-point function with a scalar current is due to the transition between the nucleon and a S-wave scattering state of a nucleon and a scalar (sigma) meson. In this proof-of-concept study, we analyse a single $N_f=3$ ensemble with the unphysically large pion mass $M_\pi=429$ MeV. Excited state contamination is substantially reduced compared to the standard method when employing nucleon-sigma type interpolating operators within a generalised eigenvector analysis.

Author

Barca, Lorenzo; Bali, Gunnar; Collins, Sara

Published

2024

Language

EN