Theory Seminar - Dorota M. Grabowska

We kindly ask all attendees to provide their full name on Zoom for Government. If attendees have questions, please introduce yourself to the speaker before asking it.

Speaker: Dorota M Grabowska (CERN)

Title: Extracting Phase Shifts from Finite-Volume Simulations

Abstract: An overwhelming body of evidence has established quantum chromodynamics (QCD) as the underlying theory of the strong nuclear force. However, due to a mismatch between the fundamental fields of the theory (quarks and gluons) and the low-energy degrees of freedom (hadrons), the extraction of ab-initio observables is challenging. Lattice QCD, which utilises importance sampling to numerically estimate Euclidean spacetime quantum path integrals, is a proven method for reliably determining the properties of QCD. The last years have seen significant developments in methods relating two- and three-particle finite-volume energies to scattering observables. In this seminar, I will present my work on analytic expansions of these multi-hadron finite-volume energies, which provide both useful insights and beneficial cross checks on more general methods.