HEP Colloquia 2023

by Michele Pepe (Istituto Nazionale di Fisica Nucleare)

Wednesday 6 Dec 2023, 14:30 → 16:00 Europe/Rome

Sala Consiliare (Department of Physics)

QCD on the lattice: from New Physics to Extreme Conditions

 

Quantum ChromoDynamics (QCD) is the fundamental quantum field theory that describes the Strong Interactions between particles: it is one of the basic building blocks of the Standard Model of Particle Physics and it is responsible for the formation of nuclear matter.
QCD has the distinctive feature that its coupling is strong except for very high energies, making many interesting phenomena involving strongly interacting particles inherently non-perturbative.
I will start my talk with an overview of QCD and its key characteristics; then I will introduce the lattice regularization and illustrate how to perform first-principles, non-perturbative calculations in QCD by Monte Carlo simulations on High-Performance Computers. I will highlight two topics that are currently of very high interest and that can be investigated by computations on the lattice: the anomalous magnetic moment of the muon and the behaviour of QCD under extreme conditions. In the second part of my talk I will focus on thermal QCD in the regime of high temperatures, where quarks and gluons form a plasma, discussing results on screening masses and on the Equation of State for temperatures between 1 GeV and the ElectroWeak scale.

Pepe.pdf