3 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-ph2024
Breakdown of collinear factorisation in the photoproduction of a pair with large invariant mass
Saad Nabeebaccus, Jakob Schoenleber, Lech Szymanowski +1
We identify a exclusive process, where collinear factorisation is broken, namely the exclusive photoproduction of a pair with large invariant mass. This occ…
hep-ph2024
Evidence of collinear factorization breaking due to collinear-to-soft Glauber exchanges for a exclusive process at leading twist
Saad Nabeebaccus, Jakob Schoenleber, Lech Szymanowski +1
We exhibit an exclusive process, namely the photoproduction of a pair with large invariant mass, which violates collinear factorization. We explicitly demonstrate that t…