2002/12/04 by Arif I. Shoshi, Shoshi, Arif I., Frank Daniel Steffen +2
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Fusion materials and technologies #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Magnetic confinement fusion research #Nuclear Materials and Properties #Nuclear Theory (nucl-th) #hep-ex #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.hep-ph/0212070
11 pages, 6 figures. Talk at the 14th Topical Conference on Hadron Collider Physics (HCP2002), Karlsruhe, Germany, Sept. 29 - Oct. 5, 2002
arxiv created 2002/12/04 · openalex publication_date 2002/12/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We compute total and differential elastic cross sections of high-energy hadronic collisions in the loop-loop correlation model that provides a unified description of hadron-hadron, photon-hadron, and photon-photon reactions. The impact parameter profiles of pp and gamma*p collisions are calculated. For ultra-high energies the hadron opacity saturates at the black disc limit which tames the growth of the hadronic cross sections in agreement with the Froissart bound. We compute the impact parameter dependent gluon distribution of the proton xG(x,Q2,b) and find gluon saturation at small Bjorken x. These saturation effects manifest S-matrix unitarity in hadronic collisions and should be observable in future cosmic ray and accelerator experiments at ultra-high energies. The c.m. energies and Bjorken x at which saturation sets in are determined and LHC and THERA predictions are given.