Search for Dark Matter at Colliders

TL;DR

This paper reviews the potential for detecting dark matter at future electron-positron colliders, focusing on signals involving Z' bosons and Higgs particles, and discusses promising detection strategies and results.

Contribution

It introduces new detection methods for fermionic dark matter via Z' and Higgs mediated processes at colliders, emphasizing polarized beams and specific decay channels.

Findings

Spectacular signals possible with polarized beams at TeV colliders.

Promising discovery prospects at LHC via mono-jet signatures.

Potential to observe Higgs-mediated dark matter annihilation channels.

Abstract

Dark Matter (DM) detection prospects at future e+e- colliders are reviewed under the assumption that DM particles are fermions of the Majorana or Dirac type. Although the discussion is quite general, one will keep in mind the recently proposed candidate based on an excess of energetic photons observed in the center of our Galaxy with the Fermi-LAT satellite. If one assume that DM couples to a Zprime, using radiative return events e+e-->XX+photon, one could observe a spectacular signal at a TeV e+e- collider. This result relies on the ability of using highly polarized beams to eliminate a large part of the W exchange background. Prospects of discovery at LHC using mono-jets are also discussed and appear promising. In the second part, one assumes that DM particles annihilate through Higgs particles, either the SM boson h or MSSM type bosons called H, A. A promising scenario emerges, where one has e+e-->HA, with H decaying into hh, while A decays invisibly in most of the cases.