用 XENON1T 寻找近 Planck 质量的重暗物质。

Searching for Heavy Dark Matter near the Planck Mass with XENON1T.

机构信息

Physics Department, Columbia University, New York, New York 10027, USA.

Kamioka Observatory, Institute for Cosmic Ray Research, and Kavli Institute for the Physics and Mathematics of the Universe (WPI), University of Tokyo, Higashi-Mozumi, Kamioka, Hida, Gifu 506-1205, Japan.

出版信息

Phys Rev Lett. 2023 Jun 30;130(26):261002. doi: 10.1103/PhysRevLett.130.261002.

DOI:10.1103/PhysRevLett.130.261002

PMID:37450817

Abstract

Multiple viable theoretical models predict heavy dark matter particles with a mass close to the Planck mass, a range relatively unexplored by current experimental measurements. We use 219.4 days of data collected with the XENON1T experiment to conduct a blind search for signals from multiply interacting massive particles (MIMPs). Their unique track signature allows a targeted analysis with only 0.05 expected background events from muons. Following unblinding, we observe no signal candidate events. This Letter places strong constraints on spin-independent interactions of dark matter particles with a mass between 1×10^{12} and 2×10^{17} GeV/c^{2}. In addition, we present the first exclusion limits on spin-dependent MIMP-neutron and MIMP-proton cross sections for dark matter particles with masses close to the Planck scale.

摘要

多种可行的理论模型预测存在质量接近普朗克质量的重暗物质粒子，而这一范围在当前的实验测量中相对较少涉及。我们使用 XENON1T 实验收集的 219.4 天数据，对来自多重相互作用重粒子（MIMP）的信号进行了盲目搜索。它们独特的轨迹特征仅允许通过预期的 0.05 个来自μ子的背景事件进行有针对性的分析。在解除盲目性后，我们没有观察到候选信号事件。这封信对质量在 1×10^{12}和 2×10^{17}GeV/c^{2}之间的暗物质粒子与物质的无自旋相互作用施加了严格的限制。此外，我们还提出了对接近普朗克尺度的暗物质粒子的自旋依赖 MIMP-中子和 MIMP-质子截面的首次排除限制。