2014/04/30 by Tolga Altinoluk, N. Armesto, Néstor Armesto +3 · 2 citations
Physics and Astronomy · #Condensed matter physics #Eikonal approximation #Eikonal equation #Formalism (music) #Gluon #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Projectile #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Spin density #hep-ph
paper · pdf · doi:10.1007/jhep07(2014)068
34 pages, new reference added, some typos corrected
arxiv created 2014/05/05 · openalex publication_date 2014/07/01 · arxiv updated 2015/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present a new method to systematically include corrections to the eikonal approximation in the background field formalism. Specifically, we calculate the subleading, power-suppressed corrections due to the finite width of the target or the finite energy of the projectile. Such power-suppressed corrections involve Wilson lines decorated by gradients of the background field — thus related to the density - of the target. The method is of generic applicability. As a first example, we study single inclusive gluon production in pA collisions, and various related spin asymmetries, beyond the eikonal accuracy.