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arXiv 1711.08473astro-ph.CO
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引力再加热的引力波信号和宇宙学后果

Gravitational wave signals and cosmological consequences of gravitational reheating

Michał Artymowski, Olga Czerwińska, Zygmunt Lalak, Marek Lewicki

摘要:

即使暴胀子仅通过引力耦合到标准模型(SM)粒子,暴胀后的再加热也可以进行。然而,在de-Sitter膨胀和减速宇宙之间的过渡期间,粒子的产生是相当低效的,并且恢复可见宇宙的必要性导致了最初由暴胀子场的残余物主导的非标准宇宙学演化。我们仍然不可知的具体动态的暴胀场,并讨论了一个通用的情况下,其残余物表现为一个完美的流体与一般正压参数$w$。使用CMB和BBN约束,我们得到了通货膨胀尺度的允许范围。我们还表明,这种情况下的结果在一个特征的原始引力波(GW)的频谱,这给了希望,在即将到来的运行的LIGO观测以及在其他计划的实验。

英文摘要:

Reheating after inflation can proceed even if the inflaton couples to Standard Model (SM) particles only gravitationally. However, particle production during the transition between de-Sitter expansion and a decelerating Universe is rather inefficient and the necessity to recover the visible Universe leads to a non-standard cosmological evolution initially dominated by remnants of the inflaton field. We remain agnostic to the specific dynamics of the inflaton field and discuss a generic scenario in which its remnants behave as a perfect fluid with a general barotropic parameter $w$. Using CMB and BBN constraints we derive the allowed range of inflationary scales. We also show that this scenario results in a characteristic primordial Gravitational Wave (GW) spectrum which gives hope for observation in upcoming runs of LIGO as well as in other planned experiments.

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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