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Characterising dark matter searches at colliders and direct detection experiments: vector mediators

  • Oliver Buchmueller
  • Matthew J. Dolan
  • Sarah A. Malik
  • Christopher McCabe
Open Access
Regular Article - Experimental Physics

Abstract

We introduce a Minimal Simplified Dark Matter (MSDM) framework to quantitatively characterise dark matter (DM) searches at the LHC. We study two MSDM models where the DM is a Dirac fermion which interacts with a vector and axial-vector mediator. The models are characterised by four parameters: m DM , M med , g DM and g q, the DM and mediator masses, and the mediator couplings to DM and quarks respectively. The MSDM models accurately capture the full event kinematics, and the dependence on all masses and couplings can be systematically studied. The interpretation of mono-jet searches in this framework can be used to establish an equal-footing comparison with direct detection experiments. For theories with a vector mediator, LHC mono-jet searches possess better sensitivity than direct detection searches for light DM masses (≲5 GeV). For axial-vector mediators, LHC and direct detection searches generally probe orthogonal directions in the parameter space. We explore the projected limits of these searches from the ultimate reach of the LHC and multi-ton xenon direct detection experiments, and find that the complementarity of the searches remains. Finally, we provide a comparison of limits in the MSDM and effective field theory (EFT) frameworks to highlight the deficiencies of the EFT framework, particularly when exploring the complementarity of mono-jet and direct detection searches.

Keywords

Exotics Beyond Standard Model Hadron-Hadron Scattering Particle and resonance production 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  • Oliver Buchmueller
    • 1
  • Matthew J. Dolan
    • 2
  • Sarah A. Malik
    • 1
  • Christopher McCabe
    • 3
    • 4
  1. 1.High Energy Physics GroupBlackett Laboratory, Imperial CollegeLondonU.K.
  2. 2.Theory Group, SLAC National Accelerator LaboratoryMenlo ParkU.S.A.
  3. 3.Institute for Particle Physics PhenomenologyDurham UniversityDurhamU.K.
  4. 4.GRAPPA, University of AmsterdamAmsterdamNetherlands

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