NNLL top-antitop production at threshold

Author(s)
Maximilian Stahlhofen, André H. Hoang
Abstract

We present an update to the NNLL RG-improved QCD prediction of top-antitop production in electron-positron annihilation at threshold. It includes for the first time a complete NNLL resummation of ultrasoft logarithms, which are dominant at this order and give a sizable correction. The renormalization scale dependence of the total resonance cross section decreases substantially compared to earlier predictions, where the ultrasoft logarithms were included only partially.

Organisation(s)
Particle Physics
Journal
Proceedings of Science (PoS)
Volume
2011
No. of pages
8
Publication date
2011
Austrian Fields of Science 2012
103034 Particle physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/nnll-topantitop-production-at-threshold(e2e45fcd-5008-4328-848a-411b461dda49).html