Hadron masses and power corrections to event shapes
High Energy Physics - Phenomenology
2009-11-07 v2
Abstract
It is widely believed that hadronisation leads to 1/Q corrections to e+e- event shapes. We show that there are further corrections, proportional to (ln Q)^A/Q with A=4C_A/beta_0~=1.6, associated with hadron masses and whose relative normalisations can be calculated from one observable to another. At today's energies these extra corrections can be of the same order of magnitude as `traditional' 1/Q corrections. They fall into two classes: universal and non-universal. The latter can be eliminated by suitable redefinitions of the observables.
Cite
@article{arxiv.hep-ph/0102343,
title = {Hadron masses and power corrections to event shapes},
author = {G. P. Salam and D. Wicke},
journal= {arXiv preprint arXiv:hep-ph/0102343},
year = {2009}
}
Comments
46 pages, LaTeX with amsmath and amssymb packages. This version has an amplified discussion of various issues and some extra references