Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

On the prediction of spectral densities from Lattice QCD: numerical aspects

Jun 6, 2023, 5:20 PM
DAD - Room 5H (Genova, Italy)

DAD - Room 5H

Genova, Italy

Contributed Hadron decays, production and interactions Hadron decays, production and interaction


Dr Matteo Saccardi (Istituto Nazionale di Fisica Nucleare)


Hadronic spectral densities play a pivotal role in particle physics, a primer example being the R-ratio defined from electron-positron scattering into hadrons. To predict them from first principles using Lattice QCD, we face a numerically ill-posed inverse problem, due to the Euclidean signature adopted in practical simulations. Here we present a recent numerical analysis of the vector isovector spectral density extracted using the multi-level algorithm (recently extended also to the case of dynamical fermions) and discuss its implications.

Primary authors

Dr Matteo Saccardi (Istituto Nazionale di Fisica Nucleare) Mattia Bruno (Universita' di Milano-Bicocca)

Presentation materials

Peer reviewing