超越标准模型前沿交叉研讨会

Session

Session 3

22 Nov 2025, 11:10

Conveners

Session 3

• Pei-Hong Gu (Southeast University)

22. Cosmological phase transitions with low nucleation rates: recent progress and implications

Yun Jiang

22/11/2025, 11:10

We study cosmological phase transitions in the low-nucleation-rate regime, where standard bubble percolation fails. Two distinct mechanisms emerge: (i) a bubble-free transition, in which a higher-energy vacuum within domain walls classically decays into the true vacuum, and (ii) super-Hubble separated bubbles, leading to ultra-supercooled or reheated transitions. These scenarios reveal...

20. Cosmological signatures of neutrino seesaw mechanism

Chengcheng Han (Sun Yat-sen university)

22/11/2025, 11:35

The tiny neutrino masses are most naturally explained by seesaw mechanism through singlet right-handed neutrinos, which can further explain the matter-antimatter asymmetry in the Universe. In this work, we propose a new approach to study cosmological signatures of neutrino seesaw through the interaction between inflaton and right-handed neutrinos, which respects the shift symmetry. In our...