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

Wim Beenakker, Christoph Borschensky, Michael Krämer, Anna Kulesza, Eric Laenen, Simone Marzani, Juan Rojo

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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 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.
Original languageEnglish
Article number53
Number of pages23
JournalEuropean Physical Journal C. Particles and Fields
Volume76
Issue number2
DOIs
Publication statusPublished - 28 Jan 2016

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partons
thresholds
cross sections
pair production
ingredients
format
shift
predictions
Uncertainty

Bibliographical note

23 pages, 8 figures. The updated NLL-fast grids with NNPDF3.0NLO can be obtained from http://pauli.uni-muenster.de/~akule_01/nllwiki/index.php/NLL-fast. Accepted for publication in EPJC

Keywords

  • hep-ph
  • hep-ex

Cite this

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. In: European Physical Journal C. Particles and Fields. 2016 ; Vol. 76, No. 2.
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abstract = "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 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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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.

In: European Physical Journal C. Particles and Fields, Vol. 76, No. 2, 53, 28.01.2016.

Research output: Contribution to JournalArticleAcademicpeer-review

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T1 - NLO+NLL squark and gluino production cross-sections with threshold-improved parton distributions

AU - Beenakker, Wim

AU - Borschensky, Christoph

AU - Krämer, Michael

AU - Kulesza, Anna

AU - Laenen, Eric

AU - Marzani, Simone

AU - Rojo, Juan

N1 - 23 pages, 8 figures. The updated NLL-fast grids with NNPDF3.0NLO can be obtained from http://pauli.uni-muenster.de/~akule_01/nllwiki/index.php/NLL-fast. Accepted for publication in EPJC

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N2 - 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 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.

AB - 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 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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