太阳捕获对复杂电弱WIMP的限制
Constraints on Complex Electroweak WIMPs from Solar Capture
- University of Delaware（特拉华大学）
- Bartol Research Institute（巴托尔研究所）
- William I. Fine Theoretical Physics Institute, University of Minnesota（明尼苏达大学威廉·I·芬理论物理研究所）
- CERN（欧洲核子研究中心）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文分析电弱多重态暗物质的太阳捕获与湮灭，推广至多种表示，利用IceCube约束质量劈裂，并排除多数模型作为LZ高反冲事件的起源，同时考虑高速尾部的影响。
AI中文摘要：
粒子暗物质最令人信服的实现之一是由基于电弱多重态（electroweak multiplets）的模型提供的。这种多重态的最轻中性态可以是稳定的马约拉纳费米子（Majorana fermion）或实标量（real scalar），其唯象学由两个参数决定：暗物质质量和质量劈裂 $\{m_\chi,\delta\}$。$\delta$ 的亚MeV（sub-MeV）范围尤为重要，因为它允许大的非弹性散射截面。在本文中，我们分析了标量和费米子电弱多重态暗物质的太阳捕获、能量损失和湮灭，将先前针对Higgsino的结果推广到其他表示。我们发现，虽然双重态（doublet）的情况有些特殊，但更高表示的行为具有自相似性。对于更高的多重态，IceCube结果将劈裂限制为 $\delta \gtrsim 350$ keV，适用于所有质量高达 $100$ TeV的暗物质。假设热冻结（thermal freeze-out）和标准晕模型（Standard Halo Model）速度分布，这排除了大多数电弱暗物质模型作为LZ合作报告的单次高反冲事件的可能起源。我们还表明，暗物质分布中的高速尾部（例如由大麦哲伦云（Large Magellanic Cloud）引起的）会将LZ事件偏好的劈裂提高到许多多重态的太阳界限之上。
英文摘要：
One of the most convincing realizations of particle dark matter is provided by models based on electroweak multiplets. The lightest neutral state of such a multiplet can be a stable Majorana fermion or a real scalar, and its phenomenology is governed by two parameters: the dark matter mass and the mass splitting $\{m_χ,δ\}$. The sub-MeV range for $δ$ is particularly important as it allows for a large inelastic scattering cross section. In this paper, we analyze solar capture, energy loss, and annihilation of scalar and fermionic electroweak multiplet dark matter, generalizing earlier results for the Higgsino to other representations. We find that, while the case of a doublet is somewhat special, higher representations behave in a self-similar way. For the higher multiplets, IceCube results constrain the splitting to $δ\gtrsim 350$ keV for all dark matter masses up to $100$ TeV. Assuming thermal freeze-out and a Standard Halo Model velocity distribution, this rules out most models of electroweak dark matter as a possible origin of the single high-recoil event reported by the LZ collaboration. We also show that a high-velocity tail in the dark matter distribution, such as that induced by the Large Magellanic Cloud, raises the splitting preferred by the LZ event above the solar bounds for many of the multiplets.
