On the breaking of collinear factorization in QCD
High Energy Physics - Phenomenology
2015-06-05 v2
Abstract
We investigate the breakdown of collinear factorization for non-inclusive observables in hadron-hadron collisions. For pure QCD processes, factorization is violated at the three-loop level and it has a structure identical to that encountered previously in the case of super-leading logarithms. In particular, it is driven by the non-commutation of Coulomb/Glauber gluon exchanges with other soft exchanges. Beyond QCD, factorization may be violated at the two-loop level provided that the hard subprocess contains matrix element contributions with phase differences between different colour topologies.
Cite
@article{arxiv.1206.6363,
title = {On the breaking of collinear factorization in QCD},
author = {Jeffrey R. Forshaw and Michael H. Seymour and Andrzej Siodmok},
journal= {arXiv preprint arXiv:1206.6363},
year = {2015}
}
Comments
Version 2: minor improvements for journal publication