Theory and phenomenology of non-global logarithms
Abstract
We discuss the theoretical treatment of non-global observables, those quantities that are sensitive only to radiation in a restricted region of phase space, and describe how large `non-global' logarithms arise when we veto the energy flowing into the restricted region. The phenomenological impact of non-global logarithms is then discussed, drawing on examples from event shapes in DIS and energy-flow observables in 2-jet systems. We then describe techniques to reduce the numerical importance of non-global logarithms, looking at clustering algorithms in energy flow observables and the study of associated distribution of multiple observables.
Keywords
Cite
@article{arxiv.hep-ph/0305232,
title = {Theory and phenomenology of non-global logarithms},
author = {R. B. Appleby and G. P. Salam},
journal= {arXiv preprint arXiv:hep-ph/0305232},
year = {2007}
}
Comments
Based on talks presented at the XXXVIIIth Rencontres de Moriond 'QCD and high-energy hadronic interactions', 8 pages