Breakdown of QCD coherence ?
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We reconsider the calculation of a non-global QCD observable and find the possible breakdown of QCD coherence. This breakdown arises as a result of wide angle soft gluon emission developing a sensitivity to emission at small angles and it leads to the appearance of super-leading logarithms. We use the `gaps between jets' cross-section as a concrete example and illustrate that the new logarithms are intimately connected with the presence of Coulomb gluon contributions. Numerical estimates of their potential phenomenological significance are presented.
Keywords
Cite
@article{arxiv.hep-ph/0612202,
title = {Breakdown of QCD coherence ?},
author = {A. Kyrieleis and J. R. Forshaw and M. H. Seymour},
journal= {arXiv preprint arXiv:hep-ph/0612202},
year = {2008}
}
Comments
7 pages, 3 figures; proceedings of Workshop on Diffraction in High-Energy Physics - DIFFRACTION 2006, Sep. 5-10 2006, Adamantas, Milos island, Greece