论文标题
来自多场通货膨胀的原始黑洞与非微观耦合
Primordial Black Holes from Multifield Inflation with Nonminimal Couplings
论文作者
论文摘要
原始黑洞(PBHS)为暗物质会计提供了令人兴奋的前景。在本文中,我们考虑了融合高能物理学的现实特征的通货膨胀模型(包括多个相互作用的标量场和与时空RICCI标量的非微小耦合),这些量子可能会产生具有解决当今暗物质丰度所需范围内质量的PBH。这样的模型与超对称结构一致,并且仅将操作员纳入有效的动作中,这是从通用有效的现场理论考虑中预期的。这些型号具有光滑的大型高原的电势,并具有小场特征,可以引起短暂的超声滚动演变。该模型家族中的通货膨胀动力学对可观察物的预测与最近的测量非常吻合,例如原始曲率扰动的光谱指数以及张量与标量扰动的功率谱的比率。就像先前对由超慢倾膨胀时期的PBH形成的研究一样,我们发现至少一个无量纲参数必须高度微调才能在相关的质量范围内用于暗物质。尽管如此,我们发现这里描述的模型使用少量相关的自由参数对大量可观察量产生了准确的预测。
Primordial black holes (PBHs) provide an exciting prospect for accounting for dark matter. In this paper, we consider inflationary models that incorporate realistic features from high-energy physics -- including multiple interacting scalar fields and nonminimal couplings to the spacetime Ricci scalar -- that could produce PBHs with masses in the range required to address the present-day dark matter abundance. Such models are consistent with supersymmetric constructions, and only incorporate operators in the effective action that would be expected from generic effective field theory considerations. The models feature potentials with smooth large-field plateaus together with small-field features that can induce a brief phase of ultra-slow-roll evolution. Inflationary dynamics within this family of models yield predictions for observables in close agreement with recent measurements, such as the spectral index of primordial curvature perturbations and the ratio of power spectra for tensor to scalar perturbations. As in previous studies of PBH formation resulting from a period of ultra-slow-roll inflation, we find that at least one dimensionless parameter must be highly fine-tuned to produce PBHs in the relevant mass-range for dark matter. Nonetheless, we find that the models described here yield accurate predictions for a significant number of observable quantities using a smaller number of relevant free parameters.