Signals of leptophilic dark matter at the ILC

Adopting a model independent approach, we constrain the various effective interactions of leptophilic DM particles with the visible world from the WMAP and Planck data. The thermally averaged indirect DM annihilation cross section and the DM-electron direct-detection cross section for such a DM candidate are observed to be consistent with the respective experimental data. We study the production of cosmologically allowed leptophilic DM in association with Z (Z -> f (f) over bar), f equivalent to q, e(-), mu(-) at the ILC. We perform the chi(2) analysis and compute the 99% C. L. acceptance contours in the m. and. plane from the two-dimensional differential distributions of various kinematic observables obtained after employing parton showering and hadronisation to the simulated data. We observe that the dominant hadronic channel provides the best kinematic reach of 2.62 TeV (m(chi) = 25 GeV), which further improves to similar to 3 TeV for polarised beams at root s = 1 TeV and an integrated luminosity of 1 ab(-1).