Two-particle correlations in high energy collisions and the gluon four-point function
Abstract
We derive the rapidity evolution equation for the gluon four-point function in the dilute regime and at small x from the JIMWLK functional equation. We show that beyond leading order in Nc the mean field (Gaussian) approximation where the four point function is factorized into a product of two point functions is violated. We calculate these factorization breaking terms and show that they contribute at leading order in Nc to correlations of two produced gluons as a function of their relative rapidity and azimuthal angle, for generic (rather than back-to-back) angles. Such two-particle correlations have been studied experimentally at the BNL-RHIC collider and could be scrutinized also for pp (and, in the future, also AA) collisions at the CERN-LHC accelerator.
Keywords
Cite
@article{arxiv.1001.4820,
title = {Two-particle correlations in high energy collisions and the gluon four-point function},
author = {Adrian Dumitru and Jamal Jalilian Marian},
journal= {arXiv preprint arXiv:1001.4820},
year = {2010}
}
Comments
15 pages, 3 figures