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

The European Physical Journal. C, Particles and Fields
Wim BeenakkerJ Rojo

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 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.

References

Apr 10, 1995·Physical Review Letters·W BeenakkerP M Zerwas
Apr 28, 2009·Physical Review Letters·A Kulesza, L Motyka
Jan 1, 2014·The European Physical Journal. C, Particles and Fields·Christoph BorschenskyXavier Portell
Jun 5, 2015·The European Physical Journal. C, Particles and Fields·V KhachatryanAuthorinst The Cms Collaboration
Jun 30, 2015·The European Physical Journal. C, Particles and Fields·L A Harland-LangR S Thorne
Dec 29, 2015·The European Physical Journal. C, Particles and Fields·UNKNOWN Atlas CollaborationL Zwalinski

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Citations

Mar 7, 2017·The European Physical Journal. C, Particles and Fields·E BagnaschiG Weiglein
Jan 1, 2018·The European Physical Journal. C, Particles and Fields·E BagnaschiG Weiglein
Jan 1, 2018·The European Physical Journal. C, Particles and Fields·Rabah Abdul KhalekJuan Rojo

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Software Mentioned

NNPDF3
Prospino

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