High statistical lattice computation of quark and ghost propagators

Lattice QCD is one of the most successful approaches to understand QCD, the theory of quarks and gluons. The study of the low energy regime of this quantum field theory requires non-perturbative methods, like the formulation of QCD in a space-time lattice. Indeed, a space-time lattice provides a natural regulator of the theory. Together with the imaginary time formalism, it allows for a first principles numerical simulation of QCD. Lattice QCD research requires the intensive use of HPC resources. This Advanced Computing Project aims to compute the quark and ghost propagators from the high statistical ensemble of lattice configurations 80^4 generated in the framework of the project CPCA/A2/6816/2020. We also aim to compute related quantities like the Kugo-Ojima function and the quark-gluon vertex. A precise measurement of these two-point correlation functions will improve our description of the non-perturbative regime of QCD. Phenomena like confinement (color charged particles like quarks and gluons can not be isolated) and chiral symmetry breaking (responsible for almost the entire mass of the Universe) cannot be addressed in perturbation theory and are still open problems within strong interaction physics.

Status: Running

Starting date: 1/Mar/2022

End date: 1/Mar/2023

Financing: 2246400 core-hours Euros

Financing entity: FCT, RNCA

Project ID: 2021.09759.CPCA

Person*month: 0

Group person*month: 0