Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 19: Search for Dark Matter I

T 19.6: Vortrag

Montag, 31. März 2025, 18:00–18:15, VG 4.102

The SuperCDMS HVeV run at CUTE — •Julius Viol for the SuperCDMS collaboration — Kirchhoff-Institut für Physik, Uni Heidelberg

The SuperCDMS HVeV detectors are gram-scale cryogenic semiconductor devices used for the direct search of dark matter. They have achieved eV-scale energy resolution through the application of an electric field, enabling the amplification of the phonon signal of ionizing particle interactions via the Neganov-Trofimov-Luke effect, resulting in great sensitivity to low-mass dark matter candidates. The energy resolution of these detectors also allows the investigation of the excess of low-energy events that has been systematically observed by cryogenic low-threshold experiments. In this talk I will present details of a recent run of HVeV detectors that was conducted at CUTE (Cryogenic Underground TEst facility), a test facility at the SNOLAB underground laboratory near Sudbury, Canada. This was the first time in which such sensitive detectors were operated deep underground in a low-background environment. I will describe the goals of this run, the payload, as well as provide a first peek into the results of the ongoing data analysis.

Keywords: dark matter; cryogenic detector; low threshold; electron recoil; low energy excess