Expected background in the LZ experiment

Kudryavtsev, Vitaly A.

doi:10.1063/1.4927991

Title: Expected background in the LZ experiment

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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.

Authors:

Kudryavtsev, Vitaly A. ^[1]

Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH (United Kingdom)

Publication Date:: Mon Aug 17 00:00:00 EDT 2015

OSTI Identifier:: 22488708

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1672; Journal Issue: 1; Conference: LRT 2015: 5. international workshop in low radioactivity techniques, Seattle, WA (United States), 18-20 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

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

Citation Formats


                    Kudryavtsev, Vitaly A. Expected background in the LZ experiment.  United States: N. p., 2015. 
        Web.  doi:10.1063/1.4927991.

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                    Kudryavtsev, Vitaly A. Expected background in the LZ experiment.  United States.  https://doi.org/10.1063/1.4927991

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                    Kudryavtsev, Vitaly A. 2015.  
        "Expected background in the LZ experiment".  United States.  https://doi.org/10.1063/1.4927991.

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@article{osti_22488708,

  title        = {Expected background in the LZ experiment},

  author       = {Kudryavtsev, Vitaly A.},

  abstractNote = {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.},

  doi          = {10.1063/1.4927991},

  url          = {https://www.osti.gov/biblio/22488708},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1672,

  place        = {United States},

  year         = {Mon Aug 17 00:00:00 EDT 2015},

  month        = {Mon Aug 17 00:00:00 EDT 2015}

}

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