# Shift of Symmetries of Naive Fermions in QCD-like Lattice Theories

## TL;DR

This paper analyzes how the global symmetries of naive lattice Dirac operators in QCD-like theories depend on lattice size and dimension, affecting the spectrum and symmetry breaking patterns, with verification via simulations and random matrix theory.

## Contribution

It provides a detailed symmetry analysis of naive lattice Dirac operators in higher dimensions and identifies a reduced operator, linking lattice symmetries to spectral properties.

## Key findings

- Symmetry patterns depend on lattice size and dimension.
- Identification of a reduced Dirac operator with similar spectral properties.
- Monte Carlo results agree with random matrix theory predictions.

## Abstract

We study the global symmetries of naive lattices Dirac operators in QCD-like theories in any dimension larger than two. In particular we investigate how the chosen number of lattice sites in each direction affects the global symmetries of the Dirac operator. These symmetries are important since they do not only determine the infra-red spectrum of the Dirac operator but also the symmetry breaking pattern and, thus, the lightest pseudo-scalar mesons. We perform the symmetry analysis and discuss the possible zero modes and the degree of degeneracy of the lattice Dirac operators. Moreover we explicitly identify a "reduced" lattice Dirac operator which is the naive Dirac operator apart from the degeneracy. We verify our predictions by comparing Monte Carlo simulations of QCD-like theories in the strong coupling limit with the corresponding random matrix theories.