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Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
Incorporating all recent theoretical advances, we resum soft-gluon corrections to the total $t\bar t$ cross-section at hadron colliders at the next-to-next-to-leading logarithmic (NNLL) order. We perform the resummation in the well established framework of Mellin $N$-space resummation. We exhaustive...
Autores principales: | , , , , |
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Lenguaje: | eng |
Publicado: |
2011
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2012.03.013 http://cds.cern.ch/record/1402255 |
_version_ | 1780923700032307200 |
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author | Cacciari, Matteo Czakon, Michal Mangano, Michelangelo L Mitov, Alexander Nason, Paolo |
author_facet | Cacciari, Matteo Czakon, Michal Mangano, Michelangelo L Mitov, Alexander Nason, Paolo |
author_sort | Cacciari, Matteo |
collection | CERN |
description | Incorporating all recent theoretical advances, we resum soft-gluon corrections to the total $t\bar t$ cross-section at hadron colliders at the next-to-next-to-leading logarithmic (NNLL) order. We perform the resummation in the well established framework of Mellin $N$-space resummation. We exhaustively study the sources of systematic uncertainty like renormalization and factorization scale variation, power suppressed effects and missing two- and higher-loop corrections. The inclusion of soft-gluon resummation at NNLL brings only a minor decrease in the perturbative uncertainty with respect to the NLL approximation, and a small shift in the central value, consistent with the quoted uncertainties. These numerical predictions agree with the currently available measurements from the Tevatron and LHC and have uncertainty of similar size. We conclude that significant improvements in the $t\bar t$ cross-sections can potentially be expected only upon inclusion of the complete NNLO corrections. |
id | cern-1402255 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2011 |
record_format | invenio |
spelling | cern-14022552019-09-30T06:29:59Zdoi:10.1016/j.physletb.2012.03.013http://cds.cern.ch/record/1402255engCacciari, MatteoCzakon, MichalMangano, Michelangelo LMitov, AlexanderNason, PaoloTop-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummationParticle Physics - PhenomenologyIncorporating all recent theoretical advances, we resum soft-gluon corrections to the total $t\bar t$ cross-section at hadron colliders at the next-to-next-to-leading logarithmic (NNLL) order. We perform the resummation in the well established framework of Mellin $N$-space resummation. We exhaustively study the sources of systematic uncertainty like renormalization and factorization scale variation, power suppressed effects and missing two- and higher-loop corrections. The inclusion of soft-gluon resummation at NNLL brings only a minor decrease in the perturbative uncertainty with respect to the NLL approximation, and a small shift in the central value, consistent with the quoted uncertainties. These numerical predictions agree with the currently available measurements from the Tevatron and LHC and have uncertainty of similar size. We conclude that significant improvements in the $t\bar t$ cross-sections can potentially be expected only upon inclusion of the complete NNLO corrections.arXiv:1111.5869CERN-PH-TH-2011-277TTK-11-54oai:cds.cern.ch:14022552011-11-28 |
spellingShingle | Particle Physics - Phenomenology Cacciari, Matteo Czakon, Michal Mangano, Michelangelo L Mitov, Alexander Nason, Paolo Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title | Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title_full | Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title_fullStr | Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title_full_unstemmed | Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title_short | Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
title_sort | top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1016/j.physletb.2012.03.013 http://cds.cern.ch/record/1402255 |
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