일시: 2021년 11월 23일(화) 오후 5:00
연사: 김정한(충북대)
Abstract:
Cosmological observations have a great
potential to glean information about new physics beyond the Standard Model. The
aim of the talk is to utilize cosmological data to search for signatures from some
of the earliest phenomena in the universe over a vast range of mass scales.
First, we explore the phenomenon of heavy particle productions
during inflation which can lead to pairwise hot spots on the cosmic microwave
background (CMB). We show that a simple position space search can probe extremely heavy particle masses O (100) H∗. Second, we consider the mirror twin
Higgs models in which the entire particle content and symmetries of the
Standard Model are replicated, yielding a “twin sector”. This type of models
leaves testable imprints on the
CMB and large-scale structure (LSS) of the universe, and we show how precision cosmological data can be
used to probe those models.