The 2025 Beijing Particle Physics and Cosmology Symposium (BPCS): early Universe, gravitational-wave templates, collider phenomenology

Gauge-Invariant Analysis of Phase Transitions in Dark U(1) Sectors

27 Sep 2025, 16:00

30m

北京春晖园温泉度假酒店（Chun Hui Yuan Hot Spring Resort Hotel）

Plenary

Speaker

Prof. Wan-Zhe Feng (Tianjin University)

Description

U(1) dark and darker sectors accommodating viable dark matter candidate(s) will be discussed. When the additional U(1) symmetry undergoes spontaneous breaking, the dark sector often exhibits a characteristic phase transition pattern capable of producing detectable gravitational wave signals. A gauge-invariant formulation of the scalar potential associated with this phase transition will be discussed in detail.