2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Using the profile-likelihood method to search for dark matter in DEAP-3600

5 Jun 2019, 13:15
HC 126 (Simon Fraser University)

HC 126

Simon Fraser University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Particle Physics / Physique des particules (PPD) W2-5 Dark matter searches (PPD) | Recherche de matière sombre (PPD)


Ms Ashlea Kemp (Royal Holloway, University of London)


The DEAP-3600 detector based 2km underground at SNOLAB (Sudbury, Canada) is a dark matter direct detection experiment. The detector consists of a single-phase liquid argon (LAr) target, of 3279 kg mass. Currently, there have been two WIMP dark matter searches performed by the DEAP-3600 collaboration; for both results, a cut-and-count approach was employed. In this talk, the development of a profile-likelihood ratio statistical test and its application to DEAP-3600 will be presented. This test allows the WIMP search to account for the expected distribution of WIMPs and backgrounds in a multi-dimensional parameter space, and thereby perform a more sensitive search. Furthermore, we will also show how the profile-likelihood approach can be used to search for hidden photons and axion-like particles in the DEAP-3600 detector. We will discuss the expected signature from such particles, and how this approach can be used to search for them over the naturally present backgrounds.

Primary author

Ms Ashlea Kemp (Royal Holloway, University of London)

Presentation Materials