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

Spectral reconstruction in lattice QCD for inclusive rates and exclusive scattering amplitudes

Jun 6, 2023, 4:30 PM
DAD - Room 5H (Genova, Italy)

DAD - Room 5H

Genova, Italy

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


John Bulava (University of Southern Denmark, CP3-Origins Institute)


The spectral reconstruction of Euclidean correlation functions is an alternative to standard lattice QCD analyses. Using this approach, inclusive hadronic decays are determined directly from first principles, including the $R$-ratio and hadronic decays of the tau-lepton. The computed decay rates are smeared with a known kernel, the achievable resolution of which is related to the spatial volume of the simulations. In this regard, the novel 'masterfield' simulation paradigm enables larger volumes and correspondingly increased resolution. Finally, a novel variant of the spectral reconstruction approach is presented which improves upon traditional lattice QCD spectroscopy. This is exemplified by the finite-volume energies of two nucleons used to infer exclusive scattering amplitudes.

Primary author

John Bulava (University of Southern Denmark, CP3-Origins Institute)

Presentation materials