Description
Chair: Hideki Ishihara (NITEP, Osaka Metropolitan University)
Cosmic strings, one-dimensional topological defects that may have formed in the early universe, predict a wide variety of gravitational wave features. I will provide an overview of the gravitational wave signatures associated with cosmic strings.
I will explain the formation of cosmic superstrings following the confinement phase transition in pure Yang-Mills theory, without invoking string theory or extra dimensions, and their significance in the production of GWs. Moreover, in pure SO(2N) gauge theory, a "baryonic glueball" is predicted as a potential candidate for dark matter. This model offers a way to potentially explain both the...
Recent gravitational wave observations suggest the existence of cosmic strings except stable local strings. Embedded string are candidates of such the string, and the Z string is one of them. We have generalized the Z string for the case of $SU(N)\times U(1)$ gauge theory and found that classical stability of the string only depends on two mass ratios of Higgs and the gauge bosons. We show the...
First order phase transitions are well-motivated and extensively studied sources of gravitational waves (GWs) from the early Universe. The vacuum energy released during such transitions is assumed to be transferred primarily either to the expanding walls of bubbles of true vacuum, whose collisions source GWs, or to the surrounding plasma, producing sound waves and turbulence, which act as GW...
