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NANOGrav results and dark first order phase transitions
Science China Physics, Mechanics & Astronomy ( IF 6.4 ) Pub Date : 2021-06-29 , DOI: 10.1007/s11433-021-1724-6 Andrea Addazi , Yi-Fu Cai , Qingyu Gan , Antonino Marciano , Kaiqiang Zeng
中文翻译:
NANOGrav 结果和暗一阶相变
更新日期:2021-07-05
Science China Physics, Mechanics & Astronomy ( IF 6.4 ) Pub Date : 2021-06-29 , DOI: 10.1007/s11433-021-1724-6 Andrea Addazi , Yi-Fu Cai , Qingyu Gan , Antonino Marciano , Kaiqiang Zeng
The recent NANOGrav evidence of a common-source stochastic background provides a hint to gravitational waves (GW) radiation from the Early Universe. We show that this result can be interpreted as a GW spectrum produced from first order phase transitions (FOPTs) around a temperature in the keV-MeV window. Such a class of FOPTs at temperatures much below the electroweak scale can be naturally envisaged in several warm dark matter models such as Majoron dark matter.
中文翻译:
NANOGrav 结果和暗一阶相变
最近关于共源随机背景的 NANOGrav 证据为来自早期宇宙的引力波 (GW) 辐射提供了线索。我们表明,该结果可以解释为由 keV-MeV 窗口中某个温度附近的一阶相变 (FOPT) 产生的 GW 谱。这种温度远低于电弱尺度的 FOPT 可以在几个温暖的暗物质模型中自然地设想,例如 Majoron 暗物质。