We present results of searches for vector and pseudoscalar bosonic super-weakly interacting massive particles (WIMPs), which are dark matter candidates with masses at the keV-scale, with the XENON100 experiment. XENON100 is a dual-phase xenon time projection chamber operated at the Laboratori Nazionali del Gran Sasso. A profile likelihood analysis of data with an exposure of 224.6 live days $\times 34\mathrm{kg}$ showed no evidence for a signal above the expected background. We thus obtain new and stringent upper limits in the $(8–125)\mathrm{keV}/{\mathrm{c}}^2$ mass range, excluding couplings to electrons with coupling constants of $g_{ae}>3\times {10}^{-13}$ for pseudo-scalar and ${\alpha }^{\prime }/\alpha >2\times {10}^{-28}$ for vector super-WIMPs, respectively. These limits are derived under the assumption that super-WIMPs constitute all of the dark matter in our galaxy.

• Received 8 September 2017

DOI:https://doi.org/10.1103/PhysRevD.96.122002