NLO+NLL squark and gluino production cross-sections with threshold-improved parton distributions
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.
Keywords
Cite
@article{arxiv.1510.00375,
title = {NLO+NLL squark and gluino production cross-sections with threshold-improved parton distributions},
author = {Wim Beenakker and Christoph Borschensky and Michael Krämer and Anna Kulesza and Eric Laenen and Simone Marzani and Juan Rojo},
journal= {arXiv preprint arXiv:1510.00375},
year = {2016}
}
Comments
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