1pm-2pm: Bayesian Analysis and Analytic Continuation of Scattering Amplitudes from Lattice QCD
1pm-2pm: Bayesian Analysis and Analytic Continuation of Scattering Amplitudes from Lattice QCD
- Event time: 12:30pm until 2:30pm
- Event date: 3rd December 2025
- Speaker: Miguel Salg (Uni Bern)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
We present a novel procedure for analyzing the lattice-QCD spectrum via the finite-volume formalism to obtain constraints on multi-hadron scattering amplitudes at both real and complex energies. This approach combines a Bayesian reconstruction of the scattering amplitude on the real axis with Nevanlinna interpolation for analytic continuation to complex-valued energies. The method is non-parametric, inherently accounting for parametrization dependence within the uncertainty. We demonstrate the applicability of this approach using real lattice-QCD data in resonant systems from the HadSpec and BaSc collaborations.
About Particle Physics Theory seminars
The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..