Impact of Cosmological Phase Transitions on Dark Matter Phenomenology
宇宙相变对暗物质现象学的影响
基本信息
- 批准号:392819734
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2018
- 资助国家:德国
- 起止时间:2017-12-31 至 2020-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
As electroweak-scale dark matter (DM) continues to stubbornly evade experimental detection, the possibility that the DM abundance in the Universe is not determined by thermal freeze-out, but by some alternative mechanism, is becoming more and more appealing. We propose here to investigate in particular novel scenarios in which the dynamics of DM in the early Universe, and thus its abundance today, is influenced by cosmological phase transitions. The vacuum expectation values (vevs) of scalar fields can change abruptly during a phase transition, thereby breaking or restoring the symmetry that stabilizes DM particles. Moreover, by affecting particle masses, scalar field vevs can determine whether or not DM decay or annihilation processes are kinematically allowed. Based on a preliminary proof-of-principle study, we plan to develop theoretical models implementing this mechanism for setting the DM abundance,and to explore their phenomenology in terrestrial, astrophysical, and cosmological experiments. Moreover, we plan to connect DM phenomenology to electroweak baryogenesis by exploiting the fact that the scenarios under consideration often feature strong first order phase transitions. Finally, we plan to study the interplay between DM phenomenology and the gravitational wave signals of phase transitions in the early Universe.
随着电弱尺度暗物质(DM)继续顽固地逃避实验检测,宇宙中DM丰度不是由热冻结决定的可能性,而是由某种替代机制决定的可能性,变得越来越有吸引力。 我们建议在这里调查特别是新的情况下,DM在早期宇宙的动力学,从而其丰富的今天,宇宙学相变的影响。 标量场的真空期望值(vevs)可以在相变期间突然改变,从而打破或恢复稳定DM粒子的对称性。此外,通过影响粒子质量,标量场vevs可以确定是否DM衰变或湮灭过程是运动学允许的。 基于初步的原理验证研究,我们计划开发实现这种机制的理论模型,以设置DM丰度,并探索其现象学在陆地,天体物理学和宇宙学实验。 此外,我们计划连接DM现象电弱重子生成利用的事实,即考虑的情况下,往往具有强大的一阶相变。 最后,我们计划研究DM现象学和早期宇宙相变的引力波信号之间的相互作用。
项目成果
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Professor Dr. Joachim Kopp其他文献
Professor Dr. Joachim Kopp的其他文献
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{{ truncateString('Professor Dr. Joachim Kopp', 18)}}的其他基金
Weaker than the Weak Interaction: Dark Matter and Sterile Neutrinos in Theoretical Extensions of the Standard Model
比弱相互作用更弱:标准模型理论扩展中的暗物质和惰性中微子
- 批准号:
246162229 - 财政年份:2013
- 资助金额:
-- - 项目类别:
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