论文标题
前爆炸通货膨胀的原始黑洞
Primordial Black Holes from Pre-Big Bang inflation
论文作者
论文摘要
我们讨论了在爆炸前的通货膨胀情况下以原始黑洞形式产生大量暗物质的可能性。为此，我们考虑了在高阳光通货膨胀的字符串阶段，可能由声速参数$ c_s $的变化引起的曲率扰动的增强。在施加了所有相关的观察约束之后，我们发现所考虑的模型类别与与暗物质相关的质量范围中的大量原始黑洞的产生兼容，只要声速参数限制在相当狭窄的值范围内，$ 0.003 <c_s <0.01 $。
We discuss the possibility of producing a significant fraction of dark matter in the form of primordial black holes in the context of the pre-big bang inflationary scenario. We take into account, to this purpose, the enhancement of curvature perturbations possibly induced by a variation of the sound-speed parameter $c_s$ during the string phase of high-curvature inflation. After imposing all relevant observational constraints, we find that the considered class of models is compatible with the production of a large amount of primordial black holes in the mass range relevant to dark matter, provided the sound-speed parameter is confined in a rather narrow range of values, $0.003 < c_s < 0.01$.
