AI 中文总结
研究暗物质和重子不对称问题，基于轻子味暗物质，通过转换驱动冻结过程实现两者共生，进一步发展该机制并扩展到夸克亲合情形，分析化学平衡条件，扩大可行参数空间，预测长寿命粒子特征，推动HL - LHC专门搜索。
AI 中文摘要
暗物质和重子不对称问题仍是基础物理学中最紧迫的两个问题。考虑轻子味暗物质，近期研究表明暗物质与重子不对称的共生可通过转换驱动的冻结过程经济地实现。该机制利用半高效转换驱动偏离平衡，同时通过暗区早期热化保持与初始条件无关。本文进一步发展此机制，详细分析化学平衡条件，证明该框架可扩展到夸克亲合情形，即通过中介场向标准模型夸克和暗物质的重子数守恒的CP违反转换共振产生物质 - 反物质不对称。有色中介的强QCD相互作用扩大了可行参数空间，允许暗物质质量从几百GeV到TeV尺度。通过比较最小处理与近似考虑热质量及其运动学后果的设置，评估了热效应的影响。所得情景预测了具有软位移衰变产物的显著长寿命粒子特征，这在LHC中仅部分被探索，激发了HL - LHC的专门搜索。
英文摘要
The dark matter and baryon asymmetry problems remain two of the most pressing questions in fundamental physics. Considering lepton-flavored dark matter, it has recently been shown that the cogenesis of dark matter and the baryon asymmetry can be economically achieved via conversion-driven freeze-out. This mechanism leverages semi-efficient conversions to drive a departure from equilibrium while preserving independence from initial conditions through early thermalization of the dark sector. In this work, we develop this mechanism further, providing a detailed analysis of the chemical-equilibrium conditions and demonstrating that the framework can be extended to quark-philic scenarios, where the matter-antimatter asymmetry is generated resonantly through baryon-number-conserving $CP$-violating conversions of a mediator field into Standard Model quarks and dark matter. The strong QCD interactions of the colored mediator, including bound-state formation effects during freeze-out, substantially enlarge the viable parameter space and allow dark matter masses from a few hundred GeV up to the TeV scale. We furthermore assess the impact of thermal effects by comparing a minimal treatment with a setup that approximately accounts for thermal masses and their kinematic consequences. The resulting scenario predicts striking long-lived particle signatures with soft displaced decay products that remain only partially explored at the LHC and motivate dedicated searches at the HL-LHC.
Comments14 pages
