发表机构
Indian Institute of Technology Hyderabad; Institute of Mathematical Sciences (IMSc)（印度理工学院海德拉巴分校; 数学科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文通过II型跷跷板机制引入标量三重态，复活了非弹性双重态暗物质方案，使其在更大质量下满足 relic 密度并规避太阳俘获等约束，同时解释中微子质量。
AI 中文摘要
近期观测到的高能核反冲事件LZ230616，其反冲能量约为248 keV，为探测非弹性双重态暗物质（iDM）提供了有趣的可能性。然而，对于质量在TeV尺度附近、能够产生正确热 relic 密度的暗物质，电弱双重态暗物质方案受到太阳暗物质俘获的强烈约束。在这项工作中，我们通过II型跷跷板机制复活了非弹性双重态暗物质（iDM）方案。具体而言，我们考虑了一个惰性轻子双重态（ILD）暗物质。虽然最小ILD方案在TeV尺度附近能给出正确的 relic 丰度，但它受到直接探测和太阳暗物质俘获的强烈约束。在II型跷跷板机制中，标量三重态的存在产生了所需的质量劈裂，并提供了额外的湮灭通道，使得更大质量的暗物质也能获得正确的 relic 丰度。更大的暗物质质量也有助于规避太阳俘获和间接探测的约束。此外，标量三重态还产生了振荡数据所需的亚电子伏特中微子质量。
英文摘要
The recent observation of the high-energy nuclear recoil event LZ230616 with a recoil energy around 248 keV provides an interesting possibility to probe inelastic doublet dark matter (iDM). However, the electroweak doublet DM scenarios face strong constraints from solar DM capture for DM masses around the TeV scale which give rise to correct thermal relic density. In this work, we revive the inelastic doublet DM (iDM) scenario via type-II seesaw. In particular, we consider an inert lepton doublet (ILD) DM. While the minimal ILD scenario gives the correct relic abundance around the TeV scale, it is strongly constrained by direct detection and solar DM capture. In the type-II seesaw, the presence of the scalar triplet generates the required mass splitting and provides additional annihilation channels, allowing the correct relic abundance for much larger DM masses. The larger DM mass also helps evade the solar capture and indirect detection constraints. Additionally, the scalar triplet gives sub-eV neutrino masses required by the oscillation data.
Comments8 pages, 4 captioned figures
