期刊
EUROPEAN PHYSICAL JOURNAL C
卷 82, 期 7, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-022-10534-3
关键词
-
资金
- FWF Research Group grant FG1
- Austrian Academy of Sciences
- Elise-Richter grant [V592-N27]
In this work, we analyze the ultimate sensitivity of dark matter direct detection experiments to dark radiation, either in the form of Standard Model (SM) or semi-sterile neutrinos. We find that xenon-based dark matter searches will not be able to probe new regions of the dark matter progenitor mass and lifetime parameter space when the decay products are SM neutrinos. However, if the decay happens to a fourth neutrino species with enhanced interactions to baryons, dark radiation can either constitute the dominant background or a discoverable signal in direct detection experiments.
In this work we analyse the ultimate sensitivity of dark matter direct detection experiments to dark radiation in form of SM or semi-sterile neutrinos. This flux-component is assumed to be produced from dark matter decay. Since dark radiation may mimic dark matter signals, we perform our analysis based on likelihood statistics that allows to test the distinguishability between signals and backgrounds. Given the previous bounds from neutrino experiments, we find that xenon-based dark matter searches will not be able to probe new regions of the dark matter progenitor mass and lifetime parameter space when the decay products are SM neutrinos. In turn, if the decay instead happens to a fourth neutrino species with enhanced interactions to baryons, DR can either constitute the dominant background or a discoverable signal in direct detection experiments. In the former case, this lifts the neutrino floor for xenon-based experiments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据