6 papers
TeV-scale unification of light dark matter and neutrino mass
Cheng-Wei Chiang, Shu-Yu Ho, Van Que Tran
We demonstrate that TeV-scale heavy neutral leptons (HNLs) responsible for inverse-seesaw neutrino mass generation can simultaneously fix the cosmological abundance and decay prope…
The nano-hertz and milli-hertz stochastic gravitational waves in the minimal clockwork axion model
Xiangwei Yin, Cheng-Wei Chiang, Bo-Qiang Lu +1
The clockwork framework can realize TeV-scale symmetry breaking while generating a large axion decay constant \(f_a\). We propose a minimal clockwork axion model with t…
Dark photon dark matter constraints at the Taiwan axion search experiment with haloscope
Yuan-Hann Chang, Cheng-Wei Chiang, Hien Thi Doan +5
The dark photon is a well motivated candidate for the dark matter which comprises most of the mass of our visible Universe, leading to worldwide experimental and observational effo…
Family Unification in Grand Unification
Cheng-Wei Chiang, Tianjun Li, Naoki Yamatsu
We propose a unified model for the three Standard Model (SM) gauge symmetries and family symmetry based on grand unified gauge symmetry on six-dimensional (6D) spa…
Primordial Black Holes from Domain Wall Density Fluctuations: Bridging Gravitational Wave Observations Across Two Frequency Bands
Bo-Qiang Lu, Cheng-Wei Chiang, Tianjun Li
We propose a novel mechanism for the formation of primordial black holes by demonstrating that the delayed production of isocurvature perturbations resulting from Poisson fluctuati…
Probing Primordial Black Hole Formation from Domain Wall Isocurvature Perturbations: Constraints and Implications
Bo-Qiang Lu, Cheng-Wei Chiang, Tianjun Li
Domain walls are topological defects produced by the spontaneous symmetry-breaking of discrete symmetry during cosmological phase transitions. Domain walls can significantly contri…