TY - JOUR
T1 - First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
AU - (LUX-ZEPLIN Collaboration)
AU - Beltrame, P.
AU - Davison, T. J.R.
AU - Leason, E. A.
AU - Liu, X.
AU - Murphy, A. St J.
AU - Nguyen, A.
AU - Nilima, A.
AU - Shaw, Sally
N1 - Funding Information:
The research supporting this work took place in part at SURF in Lead, South Dakota. Funding for this work is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under awards no. DE-AC02-05CH11231, no. DE-SC0020216, no. DE-SC0012704, no. DE-SC0010010, no. DE-AC02-07CH11359, no. DE-SC0012161, no. DE-SC0015910, no. DE-SC0014223, no. DE-SC0010813, no. DE-SC0009999, no. DE-NA0003180, no. DE-SC0011702, no. DE-SC0010072, no. DE-SC0015708, no. DE-SC0006605, no. DE-SC0008475, no. DE-SC0019193, no. DE-FG02-10ER46709, no. UW PRJ82AJ, no. DE-SC0013542, no. DE-AC02-76SF00515, no. DE-SC0018982, no. DE-SC0019066, no. DE-SC0015535, no. DE-SC0019319, no. DE-AC52-07NA27344, and no. DOE-SC0012447. This research was also supported by U.S. National Science Foundation (NSF); the UKRI’s Science and Technology Facilities Council under grants no. ST/M003744/1, no. ST/M003655/1, no. ST/M003639/1, no. ST/M003604/1, no. ST/M003779/1, no. ST/M003469/1, no. ST/M003981/1, no. ST/N000250/1, no. ST/N000269/1, no. ST/N000242/1, no. ST/N000331/1, no. ST/N000447/1, no. ST/N000277/1, no. ST/N000285/1, no. ST/S000801/1, no. ST/S000828/1, no. ST/S000739/1, no. ST/S000879/1, no. ST/S000933/1, no. ST/S000844/1, no. ST/S000747/1, no. ST/S000666/1, no. ST/R003181/1; Portuguese Foundation for Science and Technology (FCT) under grant no. PTDC/FIS-PAR/2831/2020; the Institute for Basic Science, Korea (budget no. IBS-R016-D1). We acknowledge additional support from the STFC Boulby Underground Laboratory in the U.K., the GridPP and IRIS collaborations, in particular at Imperial College London and additional support by the University College London (UCL) Cosmoparticle Initiative. We acknowledge additional support from the Center for the Fundamental Physics of the Universe, Brown University. K. T. L. acknowledges the support of Brasenose College and Oxford University. The LZ Collaboration acknowledges key contributions of Dr. Sidney Cahn, Yale University, in the production of calibration sources. We acknowledge Martin Hoferichter and Achim Schwenk for useful discussions. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under award no. DE-AC02-05CH11231. We gratefully acknowledge support from GitLab through its GitLab for Education Program. The University of Edinburgh is a charitable body, registered in Scotland, with the registration number SC005336. The assistance of SURF and its personnel in providing physical access and general logistical and technical support is acknowledged. We acknowledge the South Dakota Governor’s office, the South Dakota Community Foundation, the South Dakota State University Foundation, and the University of South Dakota Foundation for use of xenon. We also acknowledge the University of Alabama for providing xenon. We thank the journal reviewers for careful examination of our work, leading to some changes in our analysis and a more robust result. For the purpose of open access, the authors have applied a Creative Commons Attribution (CC BY) license to any Author Accepted Manuscript version arising from this submission.
Publisher Copyright:
© 2023 authors. Published by the American Physical Society.
PY - 2023/7/28
Y1 - 2023/7/28
N2 - The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60 live days using a fiducial mass of 5.5 t. A profile-likelihood ratio analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon, spin-dependent WIMP-neutron, and spin-dependent WIMP-proton cross sections for WIMP masses above 9 GeV/c2. The most stringent limit is set for spin-independent scattering at 36 GeV/c2, rejecting cross sections above 9.2×10-48 cm at the 90% confidence level.
AB - The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60 live days using a fiducial mass of 5.5 t. A profile-likelihood ratio analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon, spin-dependent WIMP-neutron, and spin-dependent WIMP-proton cross sections for WIMP masses above 9 GeV/c2. The most stringent limit is set for spin-independent scattering at 36 GeV/c2, rejecting cross sections above 9.2×10-48 cm at the 90% confidence level.
UR - http://www.scopus.com/inward/record.url?scp=85166733827&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.131.041002
DO - 10.1103/PhysRevLett.131.041002
M3 - Article
C2 - 37566836
AN - SCOPUS:85166733827
SN - 0031-9007
VL - 131
SP - 1
EP - 11
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 041002
ER -