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We report the results of a weakly-interacting massive particle (WIMP) darkmatter search using the full 80.1\;live-day exposure of the first stage of thePandaX experiment (PandaX-I) located in the China Jin-Ping UndergroundLaboratory. The PandaX-I detector has been optimized for detecting low-massWIMPs, achieving a photon detection efficiency of 9.6\%. With a fiducial liquidxenon target mass of 54.0\,kg, no significant excess event were found above theexpected background. A profile likelihood analysis confirms our earlier findingthat the PandaX-I data disfavor all positive low-mass WIMP signals reported inthe literature under standard assumptions. A stringent bound on the low massWIMP is set at WIMP mass below 10\,GeV/c$^2$, demonstrating that liquid xenondetectors can be competitive for low-mass WIMP searches.

Low-mass dark matter search results from full exposure of PandaX-I experiment