Journal of Cosmology and Astroparticle Physics ( IF 6.4 ) Pub Date : 2021-04-16 , DOI: 10.1088/1475-7516/2021/04/043 Amit Bhoonah 1 , Joseph Bramante 1, 2 , Simran Nerval 1 , Ningqiang Song 1, 2
Gravitational wave signatures from dynamical scalar field configurations provide a compelling observational window on the early universe. Here we identify intriguing connections between dark matter and scalars fields that emit gravitational waves, either through a first order phase transition or oscillating after inflation. To study gravitational waves from first order phase transitions, we investigate a simplified model consisting of a heavy scalar coupled to a vector and fermion field. We then compute gravitational wave spectra sourced by inflaton field configurations oscillating after E-Model and T-Model inflation. Some of these gravitational wave signatures can be uncovered by the future Big Bang Observatory, although in general we find that MHz-GHz frequency gravitational wave sensitivity will be critical for discovering the heaviest dark sectors. Intriguingly, we find that scalars undergoing phase transitions, along with E-Model and T-Model potentials, can impel a late-time dark matter mass boost and generate up to Planck mass dark matter. For phase transitions and oscillating inflatons, the largest dark matter mass boosts correspond to higher amplitude stochastic gravitational wave backgrounds.
中文翻译:
来自暗区的引力波、振荡的暴胀子和质量增强的暗物质
来自动态标量场配置的引力波特征为早期宇宙提供了一个引人注目的观察窗口。在这里,我们确定了暗物质和发射引力波的标量场之间的有趣联系,无论是通过一阶相变还是在暴胀后振荡。为了研究来自一阶相变的引力波,我们研究了一个由耦合到矢量和费米子场的重标量组成的简化模型。然后,我们计算由 E 模型和 T 模型膨胀后振荡的暴胀子场配置产生的引力波谱。其中一些引力波特征可以被未来的大爆炸天文台发现,尽管总的来说,我们发现 MHz-GHz 频率的引力波灵敏度对于发现最重的暗扇区至关重要。有趣的是,我们发现经历相变的标量,连同 E-Model 和 T-Model 势,可以推动后期暗物质质量增加,并产生高达普朗克质量的暗物质。对于相变和振荡暴胀子,最大的暗物质质量提升对应于更高振幅的随机引力波背景。