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Title: First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
Authors: Aalbers, J. 
Akerib, D. S.
Akerlof, C. W.
Musalhi, A. K. Al
Brás, P. 
Cabrita, R. 
Lindote, A. 
Lopes, M. I. 
Lopez Asamar, E.
Neves, F.
Pal, S. 
Pereira, C. 
Pereira, G.
Porzio, D. 
Rodrigues, J. P.
Silva, C. 
Solovov, V. N. 
et al.
Keywords: High Energy Physics - Experiment; Cosmology and Nongalactic Astrophysics
Issue Date: 8-Jul-2022
Project: info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC/FIS-PAR/28557/2017/PT/XENON1T e XENONnT experiments participation 
info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC/FIS-NUC/0145/2014/PT/Direct dark matter search with the XENON1T and XENONnT experiments 
Abstract: The LUX-ZEPLIN (LZ) 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 LZ'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/c$^2$. The most stringent limit is set at 30 GeV/c$^2$, excluding cross sections above 5.9$\times 10^{-48}$ cm$^2$ at the 90\% confidence level.
Description: 9 pages, 6 figures. See for a data release related to this paper
Rights: openAccess
Appears in Collections:I&D CFis - Artigos em Revistas Internacionais

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