164 citations · 2.2k across the 66 of their papers we have counts for
66 papers
Gravitational waves and dark matter with Witten effect
Ruiyu Zhou, Ligong Bian
We investigate the breaking of dark symmetry at different temperature scales, occurring after Peccei-Quinn symmetry breaking or following QCD symmetry breaking. We focus…
Gravitational wave and dark matter from Axion-Higgs string
Yongtao Jia, Ligong Bian
Axions have long been considered plausible candidates for dark matter. The axion dark matter emitted from cosmic strings after the Peccei-Quinn (PQ) symmetry breaking in the early…
Cosmic Simulations of Axion String-Wall Networks: Probing Dark Matter and Gravitational Waves for Discovery
Yang Li, Ligong Bian, Rong-Gen Cai +1
We simultaneously study gravitational waves (GWs) and free axions emitted from axionic string-wall networks in the early universe using advanced 3D lattice simulations. Our simulat…
Heavy QCD axion model in light of pulsar timing arrays
Moslem Ahmadvand, Ligong Bian, Soroush Shakeri
Recently, pulsar timing array experiments reported the observation of a stochastic gravitational wave background in the nanohertz range frequency band. We show that such a signal c…
Gravitational wave sources for Pulsar Timing Arrays
Ligong Bian, Shuailiang Ge, Jing Shu +3
Very recently, several pulsar timing array collaborations, including CPTA, EPTA, and NANOGrav, reported their results from searches for an isotropic stochastic gravitational wave b…
Solving the domain wall problem with first-order phase transition
Yang Li, Ligong Bian, Yongtao Jia
Domain wall networks are two-dimensional topological defects generally predicted in many beyond standard model physics. In this Letter, we propose to solve the domain wall problem…
Constraints on new physics around the MeV scale with cosmological observations
Shihao Deng, Ligong Bian
We investigate the joint effect of the cosmological phase transitions, thermal light dark matter, and the lepton asymmetry on the big bang nucleosynthesis and cosmic microwave back…
Domain Wall Network: A Dual Solution for Gravitational Waves and Hubble Tension?
Ligong Bian, Shuailiang Ge, Changhong Li +2
We explore the possibility that domain wall networks generate the stochastic gravitational wave background (SGWB) observed as a strong common power-law process in the Data Release-…
Constraining first-order phase transitions with curvature perturbations
Jing Liu, Ligong Bian, Rong-Gen Cai +2
We investigate the curvature perturbations induced by the randomness of the quantum tunneling process during cosmological first-order phase transitions (PTs) and for the first time…
Searching for cosmic string induced stochastic gravitational wave background with the Parkes Pulsar Timing Array
Ligong Bian, Jing Shu, Bo Wang +2
We search for stochastic gravitational wave background emitted from cosmic strings using the Parkes Pulsar Timing Array data over 15 years. While we find that the common power-law…
Gravitational waves and monopoles dark matter from first-order phase transition
Jing Yang, Ruiyu Zhou, Ligong Bian
We study the possibility of monopoles serving as dark matter when they are produced during the first-order phase transition in the dark sector. Our study shows that dark monopoles…
Electroweak Phase Transition and Gravitational Waves in the Type-II Seesaw Model
Ruiyu Zhou, Ligong Bian, Yong Du
The type-II seesaw model is a possible candidate for simultaneously explaining non-vanishing neutrino masses and the observed baryon asymmetry of the Universe. In this work, we stu…
Probing the electroweak symmetry breaking history with Gravitational waves
Zizhuo Zhao, Yuefeng Di, Ligong Bian +1
We perform a three dimensional lattice simulation of the electroweak symmetry breaking process through a two-step phase transition, where one of the two steps is a first order phas…
FIMP dark matter mediated by massive gauge boson around the phase transition period and the gravitational waves production
Ligong Bian, Yi-Lei Tang, Ruiyu Zhou
We study the feebly interacting massive particle dark matter whose production processes are significantly affected by the phase evolution and the complicated thermal corrections to…
Constraining cosmological phase transitions with the Parkes Pulsar Timing Array
Xiao Xue, Ligong Bian, Jing Shu +15
A cosmological first-order phase transition is expected to produce a stochastic gravitational wave background. If the phase transition temperature is on the MeV scale, the power sp…
Probing the violation process with the observation of cosmic magnetic field
Yuefeng Di, Jialong Wang, Ligong Bian +2
We investigate the violation process by performing three-dimensional lattice simulations in an electroweak theory with first-order phase transition and the electroweak sphale…
Probing superheavy dark matter with gravitational waves
Ligong Bian, Xuewen Liu, Ke-Pan Xie
We study the superheavy dark matter (DM) scenario in an extended model, where one generation of right-handed neutrino is the DM candidate. If there is a new lighter ste…
The Gravitational-Wave Physics II: Progress
Ligong Bian, Rong-Gen Cai, Shuo Cao +15
It has been a half-decade since the first direct detection of gravitational waves, which signifies the coming of the era of the gravitational-wave astronomy and gravitational-wave…
Primordial black hole production during first-order phase transitions
Jing Liu, Ligong Bian, Rong-Gen Cai +2
Primordial black holes (PBHs) produced in the early Universe have attracted wide interest for their ability to constitute dark matter and explain the compact binary coalescence. We…
Axion-like particle inflation and dark matter
Wei Cheng, Ligong Bian, Yu-Feng Zhou
In this paper, we propose a generalized natural inflation (GNI) model to study axion-like particle (ALP) inflation and dark matter (DM). GNI contains two additional parameters $(n_…
Probing new physics for and gravitational waves
Ruiyu Zhou, Ligong Bian, Jing Shu
We study the possibility of probing new physics accounting for anomaly and gravitational waves with pulsar timing array measurements. The model we consider is either a li…
Magnetic field generation from bubble collisions during first-order phase transition
Jing Yang, Ligong Bian
We study the magnetic fields generation from the cosmological first-order electroweak phase transition. We calculate the magnetic field induced by the variation of the Higgs phase…
Heavy dark matter and Gravitational waves
Xin Deng, Xuewen Liu, Jing Yang +2
Domain walls can form after breakdown of a discrete symmetry induced by first-order phase transition, we study the heavy dark matter produced around the temperature of the phase tr…
Magnetic field and gravitational waves from the first-order Phase Transition
Yuefeng Di, Jialong Wang, Ruiyu Zhou +3
We perform the three dimensional lattice simulation of the magnetic field and gravitational wave productions from bubble collisions during the first-order electroweak phase transit…