Positivity in QFT: from superfluid Helium to mesons scattering

by Alessandro Vichi (Pisa)

Tuesday 25 Feb 2025, 15:00 → 17:00 Europe/Berlin

Fundamental principles such as locality, crossing symmetry, and unitarity impose significant constraints on the landscape of quantum field theories. This talk will review recent advancements in leveraging positivity constraints to explore the space of correlation functions and scattering amplitudes. These techniques will be applied to derive precise predictions for second-order phase transitions and to investigate, and potentially constrain, large-N QCD.