Effective Field Theories on the Edge

01.11.2022 14:30 – 15:30

Using dispersion relations, I will discuss effective field theories that can originate from microscopic unitary theories. Using a simple formulation in terms of moments of a positive measure I will show that theories with isolated massive higher-spin particles, and theories with very irrelevant interactions, don’t posses healthy UV completions. This reshapes the landscape of plausible physics beyond the Standard Model.
Combining this formalism with further knowledge of the microscopic dynamics — obtained numerically via Hamiltonian Truncation methods — provides a tool to compute the S-matrix at strong-coupling.Using dispersion relations, I will discuss effective field theories that can originate from microscopic unitary theories. Using a simple formulation in terms of moments of a positive measure I will show that theories with isolated massive higher-spin particles, and theories with very irrelevant interactions, don’t posses healthy UV completions. This reshapes the landscape of plausible physics beyond the Standard Model.
Combining this formalism with further knowledge of the microscopic dynamics — obtained numerically via Hamiltonian Truncation methods — provides a tool to compute the S-matrix at strong-coupling.

Lieu

Bâtiment: Ecole de Physique

Grand Auditoire

entrée libre