A new analysis method for WIMP searches with dual-phase liquid Xe TPCs

► New data analysis method for WIMP dark matter searches with LXe dual-phase TPCs. ► Prompt scintillation light and ionization charge combined in Log (S1/C2) vs. C2. ► C2 is exhibits better nuclear recoil acceptance and superior energy resolution. ► Discrimination power of the TPC and its 3D event reconstruction fully maintained. ► New phase space is shown to be more appropriate to evaluate WIMP signal candidates.