First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment

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

First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment

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.Comment: 9 pages, 6 figures. See https://tinyurl.com/LZDataReleaseRun1 for a data release related to this pape

Centre internship / Stagiaire au CRDI

This paper identifies factors that determine whether participatory natural resources management (NRM) leads to resource capture or democratic governance of natural resources. The nature of NRM is potentially transformed by the participation of diverse stakeholders. Their different perspectives and interests contribute to participatory NRM and reveal how natural resources are connected to social and ecological processes. Government agencies must define a set of core values which are non-negotiable, (such as the framework of existing legislation) but accept that other aspects of NRM may be transformed through meaningful participation

Research in Arabic-speaking countries : funding competitions, international collaboration, and career incentives

Morocco, Tunisia, Egypt, Lebanon, Jordan, and Qatar expanded research funds over the past two decades. The use of competitive calls required researchers to prepare and submit proposals for team-based projects or time-limited research units. Identification of national priorities and societal challenges sought to rally research toward real-world problems, while larger grants encouraged a wider range of research activities and greater levels of ambition. Yet, the incentives within hiring organizations still determine how researchers allocate their time and effort, including whether they even seek external funding or collaboration. Selection and evaluation criteria privileged collaboration with distant, scientifically proficient partners abroad, in order to connect with global networks and rise in international rankings of academic quality. Moving forward, countries need to consider how funding opportunities shape the size and organization of distinct research efforts, and which arrangements are best suited to making meaningful progress on different problems of societal and scientific interest