Lattice QCD delivers on its promise for new and standard model physics

by Rajan Gupta (Los Alamos National Laboratory (US))

Monday 26 May 2025, 14:00 → 16:00 Europe/Rome

Aula Grassano (Dipartimento di Fisica Università degli Studi di Roma Tor Vergata)

Simulations of lattice Quantum Chromodynamics (QCD) are providing increasingly precise predictions of QCD with growing computing power and novel algorithms that have addressed issues of critical slowing down. This talk will give a short overview of lattice QCD and cover the calculations being done by the Los Alamos lattice QCD team to predict the properties of nucleons, in particular their charges, vector and axial vector form factors, distributions of momentum, spin and transversity, and the pion-nucleon sigma term. It will also describe calculations of the contributions from beyond the standard model physics to the neutron electric dipole moment. A brief discussion of the major systematic in these calculations -- contributions from multiparticle excited states that the LANL team has pioneered methods to identify and remove -- will also be provided.