41 citations · 232 across the 18 of their papers we have counts for
11 papers · 1 filter
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…
Clockwork axion footprint on nano-hertz stochastic gravitational wave background
Bo-Qiang Lu, Cheng-Wei Chiang, Tianjun Li
The recent Pulsar Timing Arrays (PTAs) nano-Hz gravitational wave (GW) background signal can be naturally induced by the annihilation of domain walls (DWs) formed at a symmetry-bre…
Unitarity bounds on extensions of Higgs sector
Bo-Qiang Lu, Da Huang
It is widely believed that extensions of the minimal Higgs sector is one of the promising directions for resolving many puzzles beyond the Standard Model (SM). In this work, we stu…
Probing WIMPs in space-based gravitational wave experiments
Bo-Qiang Lu, Cheng-Wei Chiang, Da Huang
Although searches for dark matter have lasted for decades, no convincing signal has been found without ambiguity in underground detections, cosmic ray observations, and collider ex…
Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
Ting-Kuo Chen, Cheng-Wei Chiang, Cheng-Tse Huang +1
With theoretical constraints such as perturbative unitarity and vacuum stability conditions and updated experimental data of Higgs measurements and direct searches for exotic scala…
Probing dark gauge boson with observations from neutron stars
Bo-Qiang Lu, Cheng-Wei Chiang
We present an investigation on the production of light dark gauge bosons by the nucleon bremsstrahlung processes in the core of neutron stars. The dark vector is assumed to be a $U…
Testing clockwork axion with gravitational waves
Cheng-Wei Chiang, Bo-Qiang Lu
We investigate the gravitational waves (GWs) produced from the Peccei-Quinn (PQ) phase transition associated with the clockwork axion. The PQ phase transition can be first-order wh…
Electroweak phase transition confronted with dark matter detection constraints
Cheng-Wei Chiang, Da Huang, Bo-Qiang Lu
We study the type-II first-order electroweak phase transition and dark matter (DM) phenomenology in both real and complex singlet extensions of SM. In the real singlet extension wi…
Evidence of a simple dark sector from XENON1T excess
Cheng-Wei Chiang, Bo-Qiang Lu
We propose that the nearly massless dark photons produced from the annihilation of keV dark fermions in the Galaxy can induce the excess of electron recoil events recently observed…
First-order electroweak phase transition in a complex singlet model with symmetry
Cheng-Wei Chiang, Bo-Qiang Lu
We consider an extension of the Standard Model with a complex singlet scalar, where a global symmetry is explicitly broken to symmetry. We study the two-step…
Comment on "Hearing the signal of dark sectors with gravitational wave detectors" [Phys. Rev. D 94, no. 10, 103519 (2016)]
Da Huang, Bo-Qiang Lu
We revisit the calculation of the gravitational wave spectra generated in a classically scale-invariant gauge sector with a scalar field in the adjoint representation, as d…