Semihard processes with BLM renormalization scale setting
Abstract
We apply the BLM scale setting procedure directly to amplitudes (cross sections) of several semihard processes. It is shown that, due to the presence of -terms in the NLA results for the impact factors, the obtained optimal renormalization scale is not universal, but depends both on the energy and on the process in question. We illustrate this general conclusion considering the following semihard processes: (i) inclusive production of two forward high- jets separated by large interval in rapidity (Mueller-Navelet jets); (ii) high-energy behavior of the total cross section for highly virtual photons; (iii) forward amplitude of the production of two light vector mesons in the collision of two virtual photons.
Keywords
Cite
@article{arxiv.1412.7962,
title = {Semihard processes with BLM renormalization scale setting},
author = {Francesco Caporale and Dmitry Yu. Ivanov and Beatrice Murdaca and Alessandro Papa},
journal= {arXiv preprint arXiv:1412.7962},
year = {2015}
}
Comments
4 pages, one figure; presented by B. Murdaca at "Diffraction 2014", International Workshop on Diffraction in High-Energy Physics, Primosten (Croatia), Sept. 10-16, 2014; to be published in the conference proceedings by AIP