Signal partitioning in superfluid ${}^4$He: a Monte Carlo approach
Abstract
Superfluid He is an ideal candidate for the direct detection of light dark matter via nuclear recoils thanks to its low nuclear mass and the possibility to reach a low detection energy threshold by exploiting the generated quasiparticles. The design of future detectors based on this target, such as the DELight experiment, requires a proper understanding of the formation and partitioning of the signal for different energy depositions from various sources. This work presents an overview of the physical processes involved in the energy deposition of recoiling electrons and ions, and describes a Monte Carlo approach to the partitioning of the signal into different channels. Despite an overall good agreement with existing literature, differences in the region of interest for light dark matter searches below 200 eV are observed.
Keywords
Cite
@article{arxiv.2410.13684,
title = {Signal partitioning in superfluid ${}^4$He: a Monte Carlo approach},
author = {Francesco Toschi and Axel Brunold and Lea Burmeister and Klaus Eitel and Christian Enss and Eleanor Fascione and Torben Ferber and Rahel Gabriel and Lena Hauswald and Felix Kahlhoefer and Sebastian Kempf and Markus Klute and Belina von Krosigk and Sebastian Lindemann and Benedikt Maier and Marc Schumann and Melih Solmaz and Kathrin Valerius and Friedrich Carl Wagner},
journal= {arXiv preprint arXiv:2410.13684},
year = {2025}
}
Comments
Figure 12 and reference 24 updated, no change of outcome