Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 50: Search for Dark Matter 2

T 50.4: Vortrag

Dienstag, 22. März 2022, 17:00–17:15, T-H35

DARWIN background estimations through multi-scatter separation — •Maike Doerenkamp, Antoine Chauvin, Andrii Terliuk, and Stephanie Hansmann-Menzemer — Physikalisches Institut, Universität Heidelberg

The DARWIN experiment is a future multi-ton dual-phase xenon TPC, whose primary goal will be the search for WIMPs through nuclear recoil. One of the major backgrounds in WIMP-nucleus interactions are radiogenic neutrons. A single nuclear recoil caused by a neutron is indistinguishable from one caused by a WIMP. However, due to their much shorter mean-free path, more than 90% of neutrons scatter multiple times within the detector. This can be exploited for background rejection. This talk will describe a method to separate single- and multi-scatter events in a dual-phase xenon TPC and how this translates to the expected neutron background rates in DARWIN.