The 4th Asian-European-Institutes Workshop for BSM

Session

1011C

11 Oct 2024, 13:30

Tsung-Dao Lee Institute/N4F-N400 - meeting room (Tsung-Dao Lee Institute)

Conveners

1011C

• Ye-Ling Zhou (HIAS-UCAS)

32. Can gravitational wave detectors meet the Majoron?

Ippei Obata (Kavli IPMU)

11/10/2024, 13:30

Optical interferometry used in the gravitational wave detectors is one of the most accurate measuring science. It enables us to detect a tiny deviation of phase velocity of laser light, and we can apply such a technological innovation to the axion detection by measuring the photon’s polarization caused by axion dark matter. In this work, we clarify if the gravitational detectors can test a...

39. Leptogenesis during a First-Order Phase Transition

Tomasz Dutka (Korea Institute for Advanced Study)

11/10/2024, 14:00

The typical mass scale and dynamics of thermal leptogenesis is well understood in the 'vanilla' framework where the departure from equilibrium is driven by the expansion of the universe. As opposed to this slow expansion, a first-order phase transition offers a drastic and violent source of out-of-equilibrium dynamics. When coupled to models of baryogenesis, such as leptogenesis, there can be...

11. Cosmology of heavy quarks in preferred axion models

Andrew Cheek (TDLI, SJTU)

11/10/2024, 14:30

I will discuss the cosmological impact of the heavy fermions that are often invoked in axion models that solve the strong CP problem. These additional fermions can lead to phases of early matter domination which would alter the predicted mass for axion dark matter as well as contributing to additional relativistic degrees of freedom which can be constrained by measurements of the Cosmic...