Tracking curvaton(s)
Tracking curvaton(s)
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跟踪曲线
DOI：
10.1103/physrevd.69.083509
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Giovannini
中科院分区：
文献类型：
--
作者：
M. Giovannini
在宇宙演化的一个重要时期，背景源的曲率能量密度与主要成分的曲率能量密度之比可能是恒定的。研究了在核合成时期之前发生衰变的跟踪曲率子的可能性。认为跟踪曲率动力学是不可取的，因为曲率衰减之前的曲率摄动值小于观测值。在一个相关的背景下，也有人认为，在低尺度典型通货膨胀的情况下，与曲率范式兼容的最小通货膨胀曲率尺度可以降低。
The ratio of the curvaton energy density to that of the dominant component of the background sources may be constant during a signicant period in the evolution of the Universe. The possibility of having tracking curvatons, whose decay occurs prior to the nucleosynthesis epoch, is studied. It is argued that the tracking curvaton dynamics is disfavoured since the value of the curvature perturbations prior to curvaton decay is smaller than the value required by observations. It is also argued, in a related context, that the minimal inflationary curvature scale compatible with the curvaton paradigm may be lowered in the case of low-scale quintessential inflation.