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Connecting Regge factorization and Collins-Soper evolution

Andrea Simonelli

hep-pharXiv:2609.07424

Abstract

The relationship between Regge factorization of amplitudes and the Collins-Soper-Sterman factorization of hadronic cross sections is explored. Seeking a unified description of rapidity divergences in high-energy scattering and transverse-momentum-dependent factorization, a connection emerges between the Collins-Soper kernel and the Regge trajectory. This provides a framework for bridging high-energy and low-transverse-momentum resummation and for future extensions of kT-factorization beyond leading-logarithmic accuracy.

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