超相对主义结:从WIMP到FIMP的桥梁
Stephen E Henrich1, Yann Mambrini2, Keith A Olive1
1University of Minnesota, William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, Minneapolis, Minnesota 55455, USA.
Physical review letters
|December 12, 2025
概括
超相对主义结 (UFO) 可以通过提升膨胀后即时重新加热的近似值来产生冷暗物质 (DM). 这种机制解释了在广泛的暗物质质量范围内观察到的遗迹密度.
科学领域:
- 宇宙学和粒子物理学的研究.
- 早期宇宙物理学 早期宇宙物理学
- 暗物质生产机制 暗物质生产机制
背景情况:
- 超相对论结 (UFO) 是早期宇宙中粒子解的机制.
- 从历史上看,UFO与热暗物质 (DM) 相关,与标准 ΛCDM 模型不相容.
- 在膨胀后即时重新加热的假设以前限制了UFO对DM的适用性.
研究的目的:
- 通过超相对论结 (UFO) 重新审视暗物质生产的可行性.
- 为了证明如何提升瞬间重新加热的近似值,允许UFO产生冷暗物质.
- 为了探索UFO可以解释观测到的遗迹密度的参数空间.
主要方法:
- 重新审视超相对论结的理论框架.
- 纳入膨胀后的非瞬间,扰动性重新加热期.
- 从亚eV到PeV尺度分析暗物质粒子质量.
- 研究标准模型粒子与暗物质之间的各种相互作用模型.
主要成果:
- 如果取消即时重新加热的近似值,UFO可以产生冷暗物质 (DM).
- 这种机制解释了在显著参数区域中观察到的全部遗迹密度.
- 具有从亚eV到PeV质量的DM可以在通过UFO形成结构之前冷.
- 微弱相互作用的大质粒子 (WIMP) 和微弱相互作用的大质粒子 (FIMP) 之间的过渡可以通过UFO发生特定相互作用.
结论:
- 超相对论结是一种生产冷暗物质的可行机制.
- 一个简单的,扰乱的膨胀后再加热期足以使UFO产生冷的DM.
- 这些发现使传统的热DM生产机制与LCDM框架内的冷DM观测相协调.
相关概念视频
Woodward–Hoffmann Selection Rules and Microscopic Reversibility
3.7K
Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
3.7K
Hückel's Rule Diagram of π MOs: Frost Circle
5.4K
The Frost circle or the inscribed polygon method is a graphical method for determining the relative energies of π molecular orbitals (MOs) for planar, fully conjugated, and monocyclic compounds. This method was first described by A. A. Frost and Boris Musulin in 1953.
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
A Frost circle is constructed by drawing a polygon whose number of edges is equal to the number of carbons of the given cyclic system, with one of the vertices pointing down. Then, a circle is drawn enclosing the polygon so that...
5.4K
Frustration and Conflict: Avoidance-Avoidance, Double-Approach Avoidance
549
Avoidance-avoidance conflict refers to a psychological situation where a person must choose between two or more unpleasant alternatives. These conflicts are particularly stressful because neither option is desirable. This dilemma is often expressed in sayings like "caught between a rock and a hard place" or "between the devil and the deep blue sea." For instance, individuals who fear dental procedures may find themselves torn between enduring a painful toothache or facing the...
549
Frustration and Conflict: Approach-Approach, Approach-Avoidance
455
Frustration occurs when people are obstructed or prevented from achieving a desired goal or fulfilling a perceived need. For example, when someone's input is ignored in a discussion, it can lead to feelings of frustration. Conflict, however, arises from opposing interests, goals, or actions. Conflicts can take various forms based on the nature of these opposing desires or goals.
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
One common type of conflict is the Approach–Approach Conflict. In this case, a person faces two desirable...
455
The Pauli Exclusion Principle
58.8K
The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
58.8K
Phase Transitions: Melting and Freezing
14.5K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
14.5K


