# QCD with chiral 4-fermion interactions ($\chi$QCD)

## TL;DR

This paper introduces a modified lattice QCD approach with chiral 4-fermion interactions that simplifies simulations at light quark masses, enabling more efficient studies of QCD phenomena.

## Contribution

It presents a novel lattice QCD formulation with chiral 4-fermion interactions that reduces computational costs for light quark simulations.

## Key findings

- Non-singular Dirac operator at zero quark mass
- Reduced computational requirements for light quark simulations
- Preliminary results at finite and zero temperatures

## Abstract

Lattice QCD with staggered quarks is augmented by the addition of a chiral 4-fermion interaction. The Dirac operator is now non-singular at $m_q=0$, decreasing the computing requirements for light quark simulations by at least an order of magnitude. We present preliminary results from simulations at finite and zero temperatures for $m_q=0$, with and without gauge fields.