33rd International Workshop on Deep Inelastic Scattering and Related Subjects (DIS2026)

Connecting Regge Factorization and Collins–Soper Evolution

7 May 2026, 12:15

20m

Sala SATURNO A, First Floor (Hotel Carlton)

Talk WG2 Small-x, Diffraction and Vector Mesons WG2 Small-x, diffraction and vector mesons

Speaker

Andrea Simonelli (Istituto Nazionale di Fisica Nucleare)

Description

The relationship between Regge factorization of amplitudes and the Collins–Soper–Sterman factorization of hadronic cross sections is explored. Aiming at a unified description of the treatment of rapidity divergences and the high-energy asymptotic behavior of scattering amplitudes, novel insights into the extension of $k_T$-factorization beyond leading-log (LL) accuracy are revealed. In particular, an intriguing connection emerges between the Collins–Soper kernel, characteristic of transverse-momentum-dependent factorization, and the Regge trajectory.

Presentation materials

DIS26_WG2_Simonelli.pdf