Single top-quark production with SHERPA

We present results at next-to-leading order accuracy in QCD for single top-quark production in the t, s and tW channels at the lhc at a centre-of-mass energy of 8TeV, obtained with the sherpa event generator. We find them in very good agreement with measured values and quantify their theory uncertai...

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Detalles Bibliográficos
Autores principales: Bothmann, Enrico, Krauss, Frank, Schönherr, Marek
Lenguaje:eng
Publicado: 2017
Materias:
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1140/epjc/s10052-018-5696-1
http://cds.cern.ch/record/2292297
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author Bothmann, Enrico
Krauss, Frank
Schönherr, Marek
author_facet Bothmann, Enrico
Krauss, Frank
Schönherr, Marek
author_sort Bothmann, Enrico
collection CERN
description We present results at next-to-leading order accuracy in QCD for single top-quark production in the t, s and tW channels at the lhc at a centre-of-mass energy of 8TeV, obtained with the sherpa event generator. We find them in very good agreement with measured values and quantify their theory uncertainties. Uncertainties stemming from the choice between the four- and the five-flavour scheme are found to be typically of the order of 5–10% over large ranges of phase space. We discuss the impact of parton distribution functions, and in particular of the bottom PDF. We also show how different cuts on QCD radiation patterns improve the signal-to-background ratio in realistic fiducial volumes.
id cern-2292297
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling cern-22922972021-11-13T09:14:51Zdoi:10.1140/epjc/s10052-018-5696-1http://cds.cern.ch/record/2292297engBothmann, EnricoKrauss, FrankSchönherr, MarekSingle top-quark production with SHERPAhep-phParticle Physics - PhenomenologyWe present results at next-to-leading order accuracy in QCD for single top-quark production in the t, s and tW channels at the lhc at a centre-of-mass energy of 8TeV, obtained with the sherpa event generator. We find them in very good agreement with measured values and quantify their theory uncertainties. Uncertainties stemming from the choice between the four- and the five-flavour scheme are found to be typically of the order of 5–10% over large ranges of phase space. We discuss the impact of parton distribution functions, and in particular of the bottom PDF. We also show how different cuts on QCD radiation patterns improve the signal-to-background ratio in realistic fiducial volumes.We present results at next-to-leading order accuracy in QCD for single top-quark production in the $t$, $s$ and $tW$ channels at the LHC at a centre-of-mass energy of 8 TeV, obtained with the SHERPA event generator. We find them in very good agreement with measured values and quantify their theory uncertainties. Uncertainties stemming from the choice between the four- and the five-flavour scheme are found to be typically of the order of 5-10 % over large ranges of phase space. We discuss the impact of parton distribution functions, and in particular of the bottom PDF. We also show how different cuts on QCD radiation patterns improve the signal-to-background ratio in realistic fiducial volumes.arXiv:1711.02568CERN-TH-2017-234EDINBURGH-17-22IPPP-17-83MCNET-17-17oai:cds.cern.ch:22922972017-11-07
spellingShingle hep-ph
Particle Physics - Phenomenology
Bothmann, Enrico
Krauss, Frank
Schönherr, Marek
Single top-quark production with SHERPA
title Single top-quark production with SHERPA
title_full Single top-quark production with SHERPA
title_fullStr Single top-quark production with SHERPA
title_full_unstemmed Single top-quark production with SHERPA
title_short Single top-quark production with SHERPA
title_sort single top-quark production with sherpa
topic hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1140/epjc/s10052-018-5696-1
http://cds.cern.ch/record/2292297
work_keys_str_mv AT bothmannenrico singletopquarkproductionwithsherpa
AT kraussfrank singletopquarkproductionwithsherpa
AT schonherrmarek singletopquarkproductionwithsherpa

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