Notes de lecture

"Jacques BAUDOU: Jean-Jacques SCHLERET, Merveilleux, fantastique et science-fiction à la télévision française", par Marc Lits; "Gilbert DURAND: Introduction à la mythodologie. Mythes et sociétés", par Marc Lits; "Pierre GLAUDES: Yves REUTER, Personnages et didactique du récit", par Marc Lits; "Pierre LéVY: Qu'est-ce que le virtuel ?", par Hugues Peeters; "Michel MAFFESOLI: éloge de la raison sensible", par Caroline Huynen; "Francisco J. VARELA, Quel savoir pour l'éthique ? Action sagesse et cognition", par Jean-Pierre Meunier"Jacques BAUDOU: Jean-Jacques SCHLERET, Merveilleux, fantastique et science-fiction à la télévision française", par Marc Lits; "Gilbert DURAND: Introduction à la mythodologie. Mythes et sociétés", par Marc Lits; "Pierre GLAUDES: Yves REUTER, Personnages et didactique du récit", par Marc Lits; "Pierre LéVY: Qu'est-ce que le virtuel ?", par Hugues Peeters; "Michel MAFFESOLI: éloge de la raison sensible", par Caroline Huynen; "Francisco J. VARELA, Quel savoir pour l'éthique ? Action sagesse et cognition", par Jean-Pierre Meunie

Les Habitats d’Intérêt Communautaire de Wallonie : Introduction générale

La publication des « Habitats d’Intérêt Communautaire de Wallonie » (HICW) est le résultat d’une collaboration entre la Direction de la Nature et de l’Eau du Département de l’Étude du Milieu Naturel et Agricole (SPW-Agriculture, Ressources naturelles et Environnement) et plusieurs services universitaires en appui scientifique à la mise en œuvre du réseau Natura 2000 en Wallonie

HIV-1 Genetic Diversity in Antenatal Cohort, Canada

Non-B HIV-1 was consistent with patients’ area of origin

Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector

DEAP-3600 is a single-phase liquid argon detector aiming to directly detect Weakly Interacting Massive Particles (WIMPs), located at SNOLAB (Sudbury, Canada). After analyzing data taken during the first year of operation, a null result was used to place an upper bound on the WIMP-nucleon spin-independent, isoscalar cross section. This study reinterprets this result within a Non-Relativistic Effective Field Theory framework, and further examines how various possible substructures in the local dark matter halo may affect these constraints. Such substructures are hinted at by kinematic structures in the local stellar distribution observed by the Gaia satellite and other recent astronomical surveys. These include the Gaia Sausage (or Enceladus), as well as a number of distinct streams identified in recent studies. Limits are presented for the coupling strength of the effective contact interaction operators $\mathcal{O}_1$, $\mathcal{O}_3$, $\mathcal{O}_5$, $\mathcal{O}_8$, and $\mathcal{O}_{11}$, considering isoscalar, isovector, and xenonphobic scenarios, as well as the specific operators corresponding to millicharge, magnetic dipole, electric dipole, and anapole interactions. The effects of halo substructures on each of these operators are explored as well, showing that the $\mathcal{O}_5$ and $\mathcal{O}_8$ operators are particularly sensitive to the velocity distribution, even at dark matter masses above 100 GeV/$c^2$

Constraints on dark matter-nucleon effective couplings in the presence of kinematically distinct halo substructures using the DEAP-3600 detector

DEAP-3600 is a single-phase liquid argon detector aiming to directly detect weakly interacting massive particles (WIMPs), located at SNOLAB (Sudbury, Canada). After analyzing data taken during the first year of operation, a null result was used to place an upper bound on the WIMP-nucleon, spin-independent, isoscalar cross section. This study reinterprets this result within a nonrelativistic effective field theory framework and further examines how various possible substructures in the local dark matter halo may affect these constraints. Such substructures are hinted at by kinematic structures in the local stellar distribution observed by the Gaia satellite and other recent astronomical surveys. These include the Gaia Sausage (or Enceladus), as well as a number of distinct streams identified in recent studies. Limits are presented for the coupling strength of the effective contact interaction operators O1, O3, O5, O8, and O11, considering isoscalar, isovector, and xenonphobic scenarios, as well as the specific operators corresponding to millicharge, magnetic dipole, electric dipole, and anapole interactions. The effects of halo substructures on each of these operators are explored as well, showing that the O5 and O8 operators are particularly sensitive to the velocity distribution, even at dark matter masses above 100 GeV=c

Pulse-shape discrimination against low-energy Ar-39 beta decays in liquid argon with 4.5 tonne-years of DEAP-3600 data

The DEAP-3600 detector searches for the scintillation signal from dark matter particles scattering on a 3.3 tonne liquid argon target. The largest background comes from 39Ar beta decays and is suppressed using pulse-shape discrimination (PSD). We use two types of PSD estimator: the prompt-fraction, which considers the fraction of the scintillation signal in a narrow and a wide time window around the event peak, and the log-likelihood-ratio, which compares the observed photon arrival times to a signal and a background model. We furthermore use two algorithms to determine the number of photons detected at a given time: (1) simply dividing the charge of each PMT pulse by the mean single-photoelectron charge, and (2) a likelihood analysis that considers the probability to detect a certain number of photons at a given time, based on a model for the scintillation pulse shape and for afterpulsing in the light detectors. The prompt-fraction performs approximately as well as the log-likelihood-ratio PSD algorithm if the photon detection times are not biased by detector effects. We explain this result using a model for the information carried by scintillation photons as a function of the time when they are detected