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arXiv 1702.02698hep-phastro-ph.HE
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暗物质触发的电弱相变的引力波信号

Gravitational Wave Signals of Electroweak Phase Transition Triggered by Dark Matter

Wei Chao, Huai-Ke Guo, Jing Shu

摘要:

在这项工作中,我们研究的情况下,宇宙经历了两个步骤的相变与第一步发生的暗物质部门和第二步之间的暗物质和电弱真空的过渡,在两个真空之间的障碍,这是必要的一个强一阶电弱相变(EWPT)所需的电弱重子生成机制,出现在树水平。我们说明了这一想法的工作与标准模型(SM)增强的标量单线态暗物质和额外的标量单线态与SM希格斯玻色子玻色子混合。我们研究了这种模式的相变发生的条件,特别是强烈的一阶EWPT发生,以及它的兼容性与成功的暗物质的基本要求,如观察到的遗迹密度和直接检测的限制。我们进一步探索发现这种模式的EWPT的可能性,通过寻找在这个过程中产生的引力波在天基干涉仪,通过显示一个代表性的基准点的参数空间,所产生的引力波落在eLISA,DECIGO和BBO的灵敏度。

英文摘要:

We study in this work a scenario that the universe undergoes a two step phase transition with the first step happened to the dark matter sector and the second step being the transition between the dark matter and the electroweak vacuums, where the barrier between the two vacuums, that is necessary for a strongly first order electroweak phase transition (EWPT) as required by the electroweak baryogenesis mechanism, arises at the tree-level. We illustrate this idea by working with the standard model (SM) augmented by a scalar singlet dark matter and an extra scalar singlet which mixes with the SM Higgs boson. We study the conditions for such pattern of phase transition to occur and especially for the strongly first order EWPT to take place, as well as its compatibility with the basic requirements of a successful dark matter, such as observed relic density and constraints of direct detections. We further explore the discovery possibility of this pattern EWPT by searching for the gravitational waves generated during this process in spaced based interferometer, by showing a representative benchmark point of the parameter space that the generated gravitational waves fall within the sensitivity of eLISA, DECIGO and BBO.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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