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Formation of primordial black holes after inflation in modified gravity and supergravity

在修正重力和超重力条件下膨胀后形成原初黑洞

基本信息

批准号：
22K03624
负责人：
Sergei V.Ketov
金额：
$ 2.75万
依托单位：
Tokyo Metropolitan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2022
资助国家：
日本
起止时间：
2022-04-01 至 2025-03-31
项目状态：
未结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K03624/
关键词：
inflation primordial black holes modified gravity supergravity dark matter gravitational waves black holes

项目摘要

During the first year FY2022 of the project our research activities were focused on theoretical investigation of formation of primordial black holes (PBH) during inflation by constructing and investigating our original models in gravitational theory and supergravity theory. All our new models were consistent with recent measurements of the Cosmic Microwave Background (CMB) radiation, and predicted the formation of PBH of the asteroid size. Numerical calculations of the power spectrum of large scalar (curvature) perturbations were performed on computers in collaboration with other researchers in South Korea, Thailand, China, Germany and Russia. We achieved significant progress in our studies of new viable models of cosmological single-field and multi-field inflation, which have a large peak in the power spectrum of scalar perturbations leading to the PBH formation, by using the modified gravity theories. In supergravity, we extended our models by adding a mechanism of spontaneous supersymmetry breaking after inflation, which is important for reheating. Our new results were published in 8 original research papers in the high-ranked (Q1 and Q2 in the Web of Science rating) peer-reviewed international journals of physics, and presented by the Principal Investigator at the major international conference on high-energy particle physics, held in Greece in September 2022.

在项目的第一年（2022财年），我们的研究活动重点是通过构建和研究我们在引力理论和超引力理论中的原始模型，对暴胀期间原始黑洞（PBH）形成的理论研究。我们所有的新模型都与最近的宇宙微波背景辐射（CMB）测量结果一致，并预测了小行星大小的PBH的形成。与韩国、泰国、中国、德国和俄罗斯的其他研究人员合作，在计算机上对大标量（曲率）扰动的功率谱进行了数值计算。我们利用修正的引力理论，在新的可行的宇宙学单场和多场暴胀模型的研究中取得了重大进展，这些模型在导致PBH形成的标量扰动的功率谱中具有较大的峰值。在超重力中，我们扩展了我们的模型，增加了暴胀后自发超对称破缺的机制，这对再加热很重要。我们的新研究结果发表在8篇原创研究论文中，发表在高排名（Web of Science排名第一和第二）的同行评议的国际物理期刊上，并由首席研究员在2022年9月在希腊举行的高能粒子物理主要国际会议上发表。