Factorization and Resummation Beyond Leading Power

by Robert Szafron (Brookhaven)

Wednesday 22 Jan 2025, 12:30 → 14:30 America/Los_Angeles

48/2-224 - Madrone (SLAC)

Factorization theorems play a crucial role in understanding and predicting the behavior of physical processes in Quantum Field Theory. By separating long- and short-distance physics, they allow for the resummation of large logarithms that often arise in perturbative calculations. This talk will provide a modern Effective Field Theory perspective on factorization. We will begin with a review of factorization at leading power, illustrated by the example of QED corrections to muon-electron conversion. We will then delve into the complexities of next-to-leading power corrections, where the traditional understanding of factorization is challenged. Specific examples will be presented, including the amplitude for di-Higgs production in gluon fusion and the cross-section for Deep Inelastic Scattering near the threshold. These examples will highlight the current progress and ongoing challenges in understanding factorization and resummation beyond leading power.

2025_SLAC.pdf