2 papers
hep-ph2026
The Fate of Ultra-Collinear Modes in On-Shell Massive Sudakov Form Factors
Marvin Schnubel, Jakob Schoenleber, Robert Szafron
Individual multi-loop diagrams for the massive Sudakov form factor contain an infinite tower of ultra-collinear momentum regions. We show that, for the on-shell form factor in QCD,…
hep-ph2025
Electron and Photon Structure Functions at Two Loops
Marvin Schnubel, Robert Szafron
We present a fully analytic computation of the complete electron and photon structure functions, or QED lepton parton distribution functions (PDFs) up to two-loop order. Our comput…