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Laboratory experiments searching for galactic dark matter particlesscattering off nuclei have so far not been able to establish a discovery. Weuse data from the XENON100 experiment to search for dark matter interactingwith electrons. With no evidence for a signal above the low background of ourexperiment, we exclude a variety of representative dark matter models thatwould induce electronic recoils. For axial-vector couplings to electrons, weexclude cross-sections above 6x10^(-35) cm^2 for particle masses of m_chi = 2GeV/c^2. Independent of the dark matter halo, we exclude leptophilic models asexplanation for the long-standing DAMA/LIBRA signal, such as couplings toelectrons through axial-vector interactions at a 4.4 sigma confidence level,mirror dark matter at 3.6 sigma, and luminous dark matter at 4.6 sigma.

Exclusion of Leptophilic Dark Matter Models using XENON100 Electronic Recoil Data