On cascade decays of squarks at the LHC in NLO QCD

Abstract

In this paper we present an analysis at NLO of the contribution from squark-squark production to the experimental signature 2j + 2l + missing E_T (+X) with opposite-sign same flavor leptons, taking into account decays and experimental cuts. We consider the case in which one squark decays directly into the lightest neutralino chi^0_1 and the other one into the second lightest neutralino and subsequently into l^+l^-chi^0_1 via an intermediate slepton. On one hand we study effects of the NLO corrections on invariant mass distributions which can be used for future parameter determination. On the other hand we analyze the impact on predictions for cut-and-count searches using this experimental signature.

21 pages, 10 figures

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• Automated third generation squark production to next-to-leading order
• Determination of the CMSSM Parameters using Neural Networks
• NNLL soft and Coulomb resummation for squark and gluino production at the LHC
• Top-squark pair production at the LHC: a complete analysis at next-to-leading order
• The ATLAS Z + MET Excess in the MSSM
• NNLL-fast 2.0: Coloured Sparticle Production at the LHC Run 3 with $\sqrt{S}$ = 13.6 TeV
• End-point resummation in squark decays