Scale Optimisation and Event Shapes in Deep-Inelastic Scattering
高能物理 - 唯象学
2007-05-23 v1
摘要
We study the effect of optimising the renormalisation and factorisation scales on perturbative calculations of event shape means defined in the Breit frame of ep DIS. Unlike in the case of e^+e^- event shape means, this has only a small effect on the NLO QCD predictions and a large power correction is still required to fit the data. However, if separate renormalization scales are introduced for the quark- and gluon-initiated sub-processes the optimisation has a much larger effect and greatly reduces the size of the required power corrections. Unfortunately, there are then problems fitting the low energy data for some observables.
引用
@article{arxiv.hep-ph/0512069,
title = {Scale Optimisation and Event Shapes in Deep-Inelastic Scattering},
author = {M. J. Dinsdale},
journal= {arXiv preprint arXiv:hep-ph/0512069},
year = {2007}
}
备注
21 pages, 6 figures