Effects of Residue Background Events in Direct Detection Experiments on Identifying WIMP Dark Matter

Abstract

We reexamine the model-independent data analysis methods for extracting properties of Weakly Interacting Massive Particles (WIMPs) by using data (measured recoil energies) from direct Dark Matter detection experiments directly and, as a more realistic study, consider a small fraction of residue background events, which pass all discrimination criteria and then mix with other real WIMP-induced signals in the analyzed data sets. In this talk, the effects of residue backgrounds on the determination of the WIMP mass as well as the spin-independent WIMP coupling on nucleons will be discussed.

8 pages, 6 eps figures, to appear in the proceedings of the 2nd International Workshop on Dark Matter, Dark Eaergy, and Matter-Antimatter Asymmetry, Hsinchu, Taiwan, November 5-6, 2010