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Model-independent WIMP Searches at the ILC

We investigate the possibility to detect WIMPs at the ILC in a model-independent way using events with single photons. The study is done with a full detector simulation of the LDC detector and MarlinReco. It turns out that WIMPs are observable this way at the ILC if their coupling to electrons is not too small. Beam polarisation can increase the accessible phase space significantly. Weakly interacting massive particles (WIMPs) are currently favoured as candidates for Dark Matter, which makes up about 20% percent of the total matter-energy content of the universe. Although the lightest supersymmetric particle, which is the lightest neutralino in many SUSY models, would make a very good WIMP if SUSY with R-Parity conservation is realised in nature, most extensions of the Standard Model of particle physics contain WIMPs. In fact the more general requirement is that some new conserved quantum number makes the lightest of the new particles stable. The International Linear Collider (ILC) offers the possibility to look for WIMPs in a rather model-independent way, which first has been pointed out in [2]. Here, the expected sensitivity to such a WIMP signal, the achievable mass resolution and the influence of beam polarisation are studied using a full detector simulation. Assuming that the cosmic relic density of WIMPs is determined by pair annihilation of