Modeling the Wall Background in the LUX-ZEPLIN (LZ) Dark Matter Experiment*

LUX-ZEPLIN (LZ) is a direct detection dark matter experiment located at the 4850 ft. level of the Sanford Underground Research Facility in Lead, South Dakota. The LZ experiment employs a dual-phase xenon time projection chamber (TPC) in combination with a novel active neutron veto to detect Weakly Interacting Massive Particles (WIMPs), one of the propitious dark matter candidates.

 

LZ has employed several mitigation techniques to reduce the background event rate in the region of interest; nevertheless, we still expect background events arising from the internal walls of the TPC. This talk will present the modeling and the simulated results of the wall backgrounds expected in LZ, thus enabling a larger fiducial volume, and improving the sensitivity to the scattering cross-section of the WIMPs.