41 citations · 232 across the 18 of their papers we have counts for
19 papers
The efficiency gap of two-step forecasts for stochastic gravitational wave background searches
Bo-Qiang Lu
The stochastic gravitational-wave background is targeted by the millihertz observatories LISA, Taiji and TianQin, and its forecast precision rests on a Whittle approximation to the…
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…
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…
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…
Constraining primordial black holes in dark matter with kinematics of dwarf galaxies
Bo-Qiang Lu, Yue-Liang Wu
We propose that the kinematical observations of dwarf galaxies can be used to constrain the primordial black hole's (PBH) abundance in dark matter since the presence of primordial…
Damping of gravitational waves in a viscous Universe and its implication for dark matter self-interactions
Bo-Qiang Lu, Da Huang, Yue-Liang Wu +1
It is well known that a gravitational wave (GW) experiences the damping effect when it propagates in a fluid with nonzero shear viscosity. In this paper, we propose a new method to…
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…
Constraints on the Sommerfeld-enhanced dark matter annihilation from the gamma rays of subhalos and dwarf galaxies
Bo-Qiang Lu, Yue-Liang Wu, Wei-Hong Zhang +1
The substructures of the Galactic dark matter halo such as dark matter subhalos and dwarf galaxies have very low velocity dispersions, which makes them useful in constraining the s…
Limits on the Dark Matter from AMS-02 antiproton and positron fraction data
Bo-Qiang Lu, Hong-Shi Zong
We derive limits on the dark matter annihilation cross section and lifetime using measurements of the AMS-02 antiproton ratio and positron fraction data. In deriving the limits, we…
The `excess' of primary cosmic ray electrons
Xiang Li, Zhao-Qiang Shen, Bo-Qiang Lu +5
With the accurate cosmic ray (CR) electron and positron spectra (denoted as and , respectively) measured by AMS-02 collaboration, the difference betw…