July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Background Simulations for the LUX-ZEPLIN Experiment

Jul 31, 2017, 2:30 PM
Hornets Nest (Fermi National Accelerator Laboratory)

Hornets Nest

Fermi National Accelerator Laboratory

Presentation Dark Matter Dark Matter


Dr Amy Cottle (Fermi National Accelerator Laboratory)


The LUX-ZEPLIN experiment will use a seven tonne dual-phase xenon TPC for the direct detection of dark matter. Understanding and mitigating background signals are crucial in its aim to push to an unprecedented sensitivity for WIMPs. I will describe the methods used to assess these, including simulations that characterise the electron and nuclear recoil responses in the detector from both internal and external background sources. Combined with the results of ongoing radioactive assays, these give an estimate of the expected background rates. Suppression of these backgrounds is achieved through fiducialisation and a veto strategy involving anti-coincidence between the main TPC and outer detectors (an instrumented xenon ‘skin’ and liquid scintillator detector). Under the present background model, LZ is projected to have a baseline sensitivity, with 1000 live days, of 2.3 x 10-48 cm2 for a 40 GeV/c2 WIMP mass.

Primary author

Dr Amy Cottle (Fermi National Accelerator Laboratory)

Presentation materials