2015/08/21 by Mihailo Backović, Backović, Mihailo, M. Krämer +9 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1508.05327
openalex publication_date 2015/08/21 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
Weakly interacting dark matter particles can be pair-produced at colliders\nand detected through signatures featuring missing energy in association with\neither QCD/EW radiation or heavy quarks. In order to constrain the mass and the\ncouplings to standard model particles, accurate and precise predictions for\nproduction cross sections and distributions are of prime importance. In this\nwork, we consider various simplified models with s-channel mediators. We\nimplement such models in the FeynRules/MadGraph5aMC@NLO framework, which\nallows to include higher-order QCD corrections in realistic simulations and to\nstudy their effect systematically. As a first phenomenological application, we\npresent predictions for dark matter production in association with jets and\nwith a top-quark pair at the LHC, at next-to-leading order accuracy in QCD,\nincluding matching/merging to parton showers. Our study shows that higher-order\nQCD corrections to dark matter production via s-channel mediators have a\nsignificant impact not only on total production rates, but also on shapes of\ndistributions. We also show that the inclusion of next-to-leading order effects\nresults in a sizeable reduction of the theoretical uncertainties.\n