2020 CAP Virtual Sessions / Sessions virtuelle de l'ACP 2020

Session

PPD-2 : Dark Matter | Matière sombre

M-PPD-2

8 Jun 2020, 15:15

Virtual Platforms

Conveners

PPD-2 : Dark Matter | Matière sombre

• Marie-Cécile Piro (University of Alberta)

Description

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17. The NEWS-G light Dark Matter search experiment: New results from the LSM

Daniel Durnford (University of Alberta)

08/06/2020, 15:15

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

The NEWS-G direct dark matter search experiment employs spherical proportional counters (SPCs) with light noble gases as target media to search for low-mass Dark Matter (DM). The next generation of the experiment is a 140 cm diameter SPC with a new sensor design and improved shielding, and will profit from a single-electron energy threshold to be sensitive to particle DM with a mass as low as...

18. Laser calibration & electron drift property analysis for NEWS-G

Jean-Marie Coquillat (Queen's University)

08/06/2020, 15:30

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

As part of the ongoing search for dark matter, the NEWS-G collaboration uses a spherical proportional counter to detect WIMP interaction. The detector consists of a grounded spherical vessel filled with gas. A positive voltage is applied on a central anode, inducing a radial electric field. Energy deposited by a WIMP can cause ionization. Under the influence of the electric field, primary...

19. The ACHINOS sensor in the NEWS-G experiment

Mr George Savvidis (Queen's University)

08/06/2020, 15:45

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

The NEWS-G experiment aims for the direct detection of low mass Weakly Interacting Massive Particle (WIMP) dark matter using Spherical Proportional Counters (SPC). At the center of the SPC, a small sensor held at high voltage drives the drift of the primary ionization and provide the amplification needed to detect sub-keV nuclear recoils down to single electrons. The ACHINOS is a novel...

40. Nuclear ionization yield measurements in Neon gas using spherical proportional counter for the NEWS-G experiments

Marie Vidal (Queen's University)

08/06/2020, 16:00

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

NEWS-G (New Experiments With Spheres-Gas) is a rare event search experiment using Spherical Proportional Counters (SPCs). Primarily designed for the direct detection of dark matter, this technology also has appealing features for Coherent Neutrino-Nucleus Scattering (CE$\nu$NS) studies using nuclear power plants as a neutrino source.
For both applications, an important property of the gas...

20. Latest data analysis results from DEAP-3600

Ashley Joy (University of Alberta)

08/06/2020, 16:15

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

DEAP-3600 is a single-phase liquid argon direct dark matter search experiment located at SNOLAB in Sudbury, Ontario. DEAP-3600 is designed to detect the nuclear recoil signal of a Weakly Interacting Massive Particle (WIMP), while using pulse-shape discrimination to remove backgrounds from argon-39 beta decay. Other sources of background include alpha decays, neutrons, and Cherenkov light. This...

21. 5.5 MeV Solar Axion Search with DEAP-3600

Carl Rethmeier (Carleton University)

08/06/2020, 16:30

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

DEAP-3600 is a liquid argon (LAr) based spin-independent direct dark matter search experiment. It is designed to detect nuclear recoils induced by the elastic scattering of weakly interacting massive particles (WIMPs) on argon nuclei. In addition, its large target mass and excellent ability to distinguish between electronic and nuclear recoils makes it well-suited for the detection of 5.5 MeV...

41. Axion Dark Matter in Non-standard Cosmologies

Moira Venegas (Universidad de Santiago de Chile)

08/06/2020, 16:45

Particle Physics / Physique des particules (PPD)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Astrophysical and cosmological observations support that dark matter constitutes more than 80% of the matter in the universe. Understanding the nature of DM will make possible to reconstruct the early universe history since all the experimental data that we have related to universe evolution comes from Big Bang nucleosynthesis era onwards.

The current Standard Model of particle physics is...

22. How was Dark Matter produced in the early universe? A Study of fermionic Dark Matter with a Z' portal

Ms Taylor Gray (Carleton University)

08/06/2020, 17:00

Particle Physics / Physique des particules (PPD)

Invited Speaker / Conférencier(ère) invité(e)

We study a model of fermionic dark matter (DM) interacting with the standard model (SM) through a Z’ mediator, the gauge boson of a U(1) extension to the SM symmetry group, to understand the mechanism responsible for the DM relic abundance in different regions of parameter space. We compare two different mechanisms for the DM production in the early universe, freeze-out and freeze-in. For...