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NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions

We present updated predictions for the cross sections for pair production of squarks and gluinos at the LHC Run II. First of all, we update the calculations based on NLO+NLL partonic cross sections by using the NNPDF3.0NLO global analysis. This study includes a full characterization of theoretical u...

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Autores principales: Beenakker, Wim, Borschensky, Christoph, Krämer, Michael, Kulesza, Anna, Laenen, Eric, Marzani, Simone, Rojo, Juan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4750428/
https://www.ncbi.nlm.nih.gov/pubmed/26900342
http://dx.doi.org/10.1140/epjc/s10052-016-3892-4
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author Beenakker, Wim
Borschensky, Christoph
Krämer, Michael
Kulesza, Anna
Laenen, Eric
Marzani, Simone
Rojo, Juan
author_facet Beenakker, Wim
Borschensky, Christoph
Krämer, Michael
Kulesza, Anna
Laenen, Eric
Marzani, Simone
Rojo, Juan
author_sort Beenakker, Wim
collection PubMed
description We present updated predictions for the cross sections for pair production of squarks and gluinos at the LHC Run II. First of all, we update the calculations based on NLO+NLL partonic cross sections by using the NNPDF3.0NLO global analysis. This study includes a full characterization of theoretical uncertainties from higher orders, PDFs and the strong coupling. Then we explore the implications for this calculation of the recent NNPDF3.0 PDFs with NLO+NLL threshold resummation. We find that the shift in the results induced by the threshold-improved PDFs is within the total theory uncertainty band of the calculation based on NLO PDFs. However, we also observe that the central values of the NLO+NLL cross sections are modified both in a qualitative and a quantitative way, illustrating the relevance and impact of using threshold-improved PDFs together with resummed partonic cross sections. The updated NLO+NLL cross sections based on NNPDF3.0NLO are publicly available in the NLL-fast format, and should be an important ingredient for the interpretation of the searches for supersymmetric particles at Run II.
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spelling pubmed-47504282016-02-19 NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions Beenakker, Wim Borschensky, Christoph Krämer, Michael Kulesza, Anna Laenen, Eric Marzani, Simone Rojo, Juan Eur Phys J C Part Fields Regular Article - Theoretical Physics We present updated predictions for the cross sections for pair production of squarks and gluinos at the LHC Run II. First of all, we update the calculations based on NLO+NLL partonic cross sections by using the NNPDF3.0NLO global analysis. This study includes a full characterization of theoretical uncertainties from higher orders, PDFs and the strong coupling. Then we explore the implications for this calculation of the recent NNPDF3.0 PDFs with NLO+NLL threshold resummation. We find that the shift in the results induced by the threshold-improved PDFs is within the total theory uncertainty band of the calculation based on NLO PDFs. However, we also observe that the central values of the NLO+NLL cross sections are modified both in a qualitative and a quantitative way, illustrating the relevance and impact of using threshold-improved PDFs together with resummed partonic cross sections. The updated NLO+NLL cross sections based on NNPDF3.0NLO are publicly available in the NLL-fast format, and should be an important ingredient for the interpretation of the searches for supersymmetric particles at Run II. Springer Berlin Heidelberg 2016-01-28 2016 /pmc/articles/PMC4750428/ /pubmed/26900342 http://dx.doi.org/10.1140/epjc/s10052-016-3892-4 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3
spellingShingle Regular Article - Theoretical Physics
Beenakker, Wim
Borschensky, Christoph
Krämer, Michael
Kulesza, Anna
Laenen, Eric
Marzani, Simone
Rojo, Juan
NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title_full NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title_fullStr NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title_full_unstemmed NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title_short NLO+NLL squark and gluino production cross sections with threshold-improved parton distributions
title_sort nlo+nll squark and gluino production cross sections with threshold-improved parton distributions
topic Regular Article - Theoretical Physics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4750428/
https://www.ncbi.nlm.nih.gov/pubmed/26900342
http://dx.doi.org/10.1140/epjc/s10052-016-3892-4
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