Altinoluk, TolgaArmesto Pérez, NéstorBeuf, GuillaumeMartínez, MauricioSalgado López, Carlos Alberto2020-04-162020-04-162014Altinoluk, T., Armesto, N., Beuf, G. et al. Next-to-eikonal corrections in the CGC: gluon production and spin asymmetries in pA collisions. J. High Energ. Phys. 2014, 68 (2014). https://doi.org/10.1007/JHEP07(2014)0681029-8479http://hdl.handle.net/10347/21456We 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 accuracyeng© 2014 The Authors. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0), which permits use, duplication, adaptation, distribution, and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were madehttps://creativecommons.org/licenses/by/4.0QCD PhenomenologyHadronic collidersjournal article10.1007/JHEP07(2014)068open access