Speaker
Andrea Simonelli
(ODU and JLAB)
Description
The spacetime structure underlying hadronic processes plays a
central role in shaping their factorization properties. In many
important cases, the relevant dynamics unfold along two opposing
light-cone directions, and any deviation from the lightcone is commonly
assumed to be negligible at leading power. In this presentation, I will
demonstrate the significance of these off lightcone effects and reveal
the universal geometric features they share across seemingly unrelated
processes. Special emphasis will be given to the role of the
Collins–Soper kernel, and specifically its unexpected appearance in the
threshold limit of Deep Inelastic Scattering (DIS).
