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

在2022财年的第一年，我们的研究活动集中在暴胀过程中原初黑洞（PBH）形成的理论研究上，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。我们所有的新模型都与最近对宇宙微波背景辐射（CMB）的测量结果一致，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。利用改进的引力理论，我们在新的宇宙学单场和多场暴胀模型的研究中取得了重要进展，这些模型在导致PBH形成的标量扰动的功率谱中有一个大的峰值。在超引力中，我们通过增加暴胀后自发超对称性破缺的机制来扩展我们的模型，这对再加热很重要。我们的新成果发表在8篇原创研究论文中，发表在高排名（Web of Science评级中的Q1和Q2）同行评审的国际物理学期刊上，并由首席研究员在2022年9月在希腊举行的高能粒子物理学重大国际会议上发表。

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.