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arXiv · 1510.00375

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
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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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Wim Beenakker, Christoph Borschensky, Michael Krämer, Anna Kulesza, Eric Laenen, Simone Marzani, Juan Rojo. 2016-01-04. NLO+NLL squark and gluino production cross-sections with threshold-improved parton distributions. https://doi.org/10.1140/epjc%2Fs10052-016-3892-4

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