Excited-Nucleon Spectroscopy with 2+1 Fermion Flavors

TL;DR

This paper reports on progress in excited nucleon state spectroscopy using 2+1-flavor anisotropic lattices, employing a new distillation technique to improve statistical accuracy in lattice QCD calculations.

Contribution

The paper introduces the application of the distillation method to excited nucleon spectroscopy on 2+1-flavor anisotropic lattices, enhancing statistical precision.

Findings

Successful implementation of distillation for nucleon correlators

Higher statistics achieved compared to previous methods

Progress in identifying excited nucleon states

Abstract

We present progress made by the Hadron Spectrum Collaboration (HSC) in determining the tower of excited nucleon states using 2+1-flavor anisotropic clover lattices. The HSC has been investigating interpolating operators projected into irreducible representations of the cubic group in order to better calculate two-point correlators for nucleon spectroscopy; results are published for quenched and 2-flavor anisotropic Wilson lattices. In this work, we present the latest results using a new technique, distillation, which allows us to reach higher statistics than before. Future directions will be outlined at the end.