Work

Catani’s generalization of collinear factorization breaking

Year: 2026

Type: article

Abstract: We consider the most general form of soft and collinear factorization for hard-scattering amplitudes to all orders in perturbative quantum chromodynamics. Specifically, we present the generalization of collinear factorization to configurations with several collinear directions, where the most singular behavior is encoded by generalized collinear splitting amplitudes that manifestly embed the breaking of strict collinear factorization in spacelike collinear configurations. We also extend the analysis to the simultaneous soft-collinear factorization with multiple collinear directions where naive multiplicative factorization does not hold. As an illustrative example of factorization breaking, we present explicit results at the one-loop level in the soft-collinear limit.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/jfy8-xqsn

Authors: Leandro Cieri, Prasanna K. Dhani, Germán Rodrigo

Institutions: Universitat de València, Instituto de Física Corpuscular

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid