Super-leading logarithms in non-global observables in QCD?
High Energy Physics - Phenomenology
2009-11-11 v2
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. We present some rough estimates of their potential phenomenological significance.
Keywords
Cite
@article{arxiv.hep-ph/0604094,
title = {Super-leading logarithms in non-global observables in QCD?},
author = {J. R. Forshaw and A. Kyrieleis and M. H. Seymour},
journal= {arXiv preprint arXiv:hep-ph/0604094},
year = {2009}
}
Comments
21 pages, 7 figures