Rencontres de Physique des Particules 2026

Session

QFT

12 mars 2026, 16:00

18. Review talk: Scattering Amplitudes and Applications to Gravitational Waves

Stefano De Angelis

12/03/2026 16:00

I will begin with a broad overview of the modern literature on scattering amplitudes and the development of the contemporary on-shell approach to quantum field theory computations. I will then turn to the recent application of these methods to gravitational wave physics, highlighting current achievements, the state of the art, and the key conceptual and technical advances in recent years. I...

19. How Parisi-Sourlas supersymmetry constrains the scalar sector

Stam Nicolis (LMPT Tours)

12/03/2026 16:40

The scalar sector of the Standard Model is the least constrained of the three parts. While supersymmetry has been used in order to impose constraints on it, it seems that these aren't stringent enough to lead to discovery of new effects on their own. In this contribution I'd like to recall the idea of Parisi and Sourlas from 1982 and show how it can lead to new constraints on the scalar sector.

20. Chiral Dynamics: Do Symmetries Have to Break?

Shahram Vatani (CP3 UCLouvain)

12/03/2026 17:00

Gauge-fermion theories and their IR fate remain puzzling mysteries in QFT, even after decades of study. Beyond their theoretical interest, they may play a natural role in extensions of the Standard Model, such as grand unified theories, dynamical symmetry breaking, and models of quark and lepton substructure. Yet our limited understanding of their nonperturbative dynamics severely hampers...

21. The 3-loop hadronic vacuum polarization in chiral perturbation theory

Mattias sebastian SJO (CPT Marseille)

12/03/2026 17:20

We compute hadronic vacuum polarization, an observable whose precision limits several important tests of the Standard Model, using two-flavor chiral perturbation theory to three loops (next-to-next-to-next-to-leading order). Particular attention is given to the loop integrals, several of which are not found in literature, and which display a novel set of relations beyond what is found through...

22. Bootstrapping on-shell quantum anomalies

Remy Larue, larue

12/03/2026 17:40

I will show how the anomaly cancellation conditions can be straightforwardly obtained by bootstrapping the on-shell amplitude of the quantum anomalies. This will be applied to various gauge and gravitational anomalies.