WIMP Searches at the International Linear Collider

Understand

Weakly Interacting Massive Particles (WIMPs, $\chi$) are candidates for Dark Matter.

• WIMP searches at lepton colliders are complementary to searches at hadron colliders and direct and indirect detection, since they directly probe the coupling to electrons which a priori is independent of the coupling to hadrons.
• Like at hadron colliders, WIMP pair production can be observed via an additional tag particle, in particular a photon from initial state radiation ($e^+e^-\rightarrow\chi\chi\gamma$).
• With this technique WIMP masses to nearly half the centre-of-mass energy can be probed.