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Séminaire général de l’INSP

DarkSide : The quest for Dark Matter with Liquid Argon - Claudio Giganti - Jeudi 31 janvier 2019 à 16 h 30

INSP - Sorbonne Université - 4 place Jussieu - 75005 Paris - Barre 22-23, 3e étage, salle 317

Claudio Giganti - LPNHE

Abstract

Gravitational effects that cannot be explained by visible matter are well documented, though their source remains deeply mysterious. One hypothesis about the nature of the so-called « dark matter », motivated by considerations in elementary particle physics, is that it consists of as-yet undiscovered elementary Weakly Interacting Massive Particles (WIMPs). WIMPs make up the dark matter halo that pervades our galaxy, and their motion should result in WIMP-nucleus elastic collisions of sufficient energy to be detected directly by a sensitive detector on Earth.

After a general introduction on the dark matter and the different detection techniques, we will discuss the recent results of the DarkSide-50 experiment, that uses Liquid Argon as Dark Matter target, and set the most stringent limits on the WIMP-nucleus cross-section for WIMP masses below 6 GeV/c2.

The next steps of the DarkSide program, featuring a 20 ton detector under construction and a future 300 ton detector will also be discussed in this seminar.