Evidence for Q-Dependent Nuclear Transverse-Momentum Redistribution Beyond Broadening from AI-driven analysis of p-Cu Drell-Yan
Abstract
We extract a target-side Cu transverse-momentum profile from fixed-target p--Cu Drell--Yan data by holding a momentum-space proton reference fixed and training only an asymmetric Cu kernel in the small-qT region. In the supported window, 0.15 xCu 0.46 and 7.5 QM 15.75 GeV, the nuclear modification is not a universal width increase. It appears as Q-dependent redistribution: an O(1~ GeV) shoulder and compensating probability flow between shoulder and resolved-tail regions, beyond one-parameter broadening.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.