Autor(es):
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.
Data: 2022
Identificador Persistente: https://hdl.handle.net/10316/100968
Origem: Estudo Geral - Universidade de Coimbra
Projeto/bolsa:
info:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC/PT;
info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC/PT;
Assunto(s): High Energy Physics - Experiment; Cosmology and Nongalactic Astrophysics
Descrição
9 pages, 6 figures. See https://tinyurl.com/LZDataReleaseRun1 for a data release related to this paper
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.
