Color Glass Condensate meets High Twist Expansion

作     者：Fu, Yu Kang, Zhong-Bo Salazar, Farid Wang, Xin-Nian Xing, Hongxi 

作者机构：Department of Physics Duke University DurhamNC27708 United States  Institute of Particle Physics Central China Normal University Wuhan430079 China Department of Physics and Astronomy University of California Los AngelesCA90095 United States Mani L. Bhaumik Institute for Theoretical Physics University of California Los AngelesCA90095 United States Center for Frontiers in Nuclear Science Stony Brook University Stony BrookNY11794 United States Institute for Nuclear Theory University of Washington SeattleWA98195 United States Nuclear Science Division Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Physics Department University of California BerkeleyCA94720 United States  Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Institute of Quantum Matter South China Normal University Guangzhou510006 China Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear Science Southern Nuclear Science Computing Center South China Normal University Guangzhou510006 China  Institute of Modern Physics Chinese Academy of Sciences Huizhou516000 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Expansion 

摘      要：We establish the correspondence between two well-known frameworks for QCD multiple scattering in nuclear media: the Color Glass Condensate (CGC) and the High-Twist (HT) expansion formalism. We argue that a consistent matching between both frameworks, in their common domain of validity, is achieved by incorporating the sub-eikonal longitudinal momentum phase in the CGC formalism, which mediates the transition between coherent and incoherent scattering. We perform a detailed calculation and analysis of direct photon production in proton-nucleus scattering as a concrete example to establish the matching between HT and CGC up to twist-4, including initial- and final-state interactions, as well as their interferences. The techniques developed in this work can be adapted to other processes in electron-nucleus and proton-nucleus collisions, and they provide a potential avenue for a unified picture of dilute-dense dynamics in nuclear media. Copyright © 2024, The Authors. All rights reserved.