Expected background in the LZ experiment

Kudryavtsev, Vitaly A.

doi:10.1063/1.4927991

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Expected background in the LZ experiment

Kudryavtsev, Vitaly A.

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Abstract

The LZ experiment, featuring a 7-tonne active liquid xenon target, is aimed at achieving unprecedented sensitivity to WIMPs with the background expected to be dominated by astrophysical neutrinos. To reach this goal, extensive simulations are carried out to accurately calculate the electron recoil and nuclear recoil rates in the detector. Both internal (from target material) and external (from detector components and surrounding environment) backgrounds are considered. A very efficient suppression of background rate is achieved with an outer liquid scintillator veto, liquid xenon skin and fiducialisation. Based on the current measurements of radioactivity of different materials, it is shown that LZ can achieve the reduction of a total background for a WIMP search down to about 2 events in 1000 live days for 5.6 tonne fiducial mass.

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY 79 ASTRONOMY AND ASTROPHYSICS ASTROPHYSICS COMPUTERIZED SIMULATION ELECTRONS INHIBITION LIQUID SCINTILLATION DETECTORS LIQUIDS NEUTRINOS PARTICLE DISCRIMINATION RADIOACTIVITY RECOILS SENSITIVITY WIMPS XENON

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Kudryavtsev, Vitaly A.. 2015-08-17. Expected background in the LZ experiment. https://doi.org/10.1063/1.4927991

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