149 citations · 1.3k across the 38 of their papers we have counts for
38 papers
Probing radiative electroweak symmetry breaking with colliders and gravitational waves
Wei Liu, Ke-Pan Xie
Radiative symmetry breaking provides an appealing explanation for electroweak symmetry breaking and addresses the hierarchy problem. We present a comprehensive phenomenological stu…
Revisiting the fermion-field nontopological solitons
Ke-Pan Xie
Nontopological fermionic solitons exist across a diverse range of particle physics models and have rich cosmological implications. This study establishes a general framework for ca…
A collider test of nano-Hertz gravitational waves from pulsar timing arrays
Shao-Ping Li, Ke-Pan Xie
A cosmic first-order phase transition (FOPT) occurring at MeV-scale provides an attractive explanation for the nano-Hertz gravitational wave (GW) background indicated by the recent…
Self-interacting dark matter implied by nano-Hertz gravitational waves
Chengcheng Han, Ke-Pan Xie, Jin Min Yang +1
The self-interacting dark matter (SIDM) paradigm offers a potential solution to the small-scale structure problems faced by collision-less cold dark matter. This framework incorpor…
Freeze-in of WIMP dark matter
Xiao-Rui Wang, Ke-Pan Xie
The nature of dark matter (DM) remains one of the most important unanswered questions in particle physics. Here, we propose a novel scenario for DM in which weakly interacting mass…
Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
Ke-Pan Xie
Primordial black holes (PBHs) are predicted in many models via different formation mechanisms. Identifying the origin of PBHs is of the same importance as probing their existence.…
First-order phase transition and fate of false vacuum remnants
Kiyoharu Kawana, Philip Lu, Ke-Pan Xie
False vacuum remnants in first-order phase transitions in the early Universe can form compact objects which may constitute dark matter. Such remnants form because particles develop…
Leptogenesis triggered by a first-order phase transition
Peisi Huang, Ke-Pan Xie
We propose a new scenario of leptogenesis, which is triggered by a first-order phase transition (FOPT). The right-handed neutrinos (RHNs) are massless in the old vacuum, while they…
Classification of Abelian domain walls
Yongcheng Wu, Ke-Pan Xie, Ye-Ling Zhou
We discuss domain walls from spontaneous breaking of Abelian discrete symmetries . A series of different domain wall structures are predicted, depending on the symmetry and ch…
Collapsing domain walls beyond
Yongcheng Wu, Ke-Pan Xie, Ye-Ling Zhou
Discrete symmetries are widely imposed in particle theories. It is well-known that the spontaneous breaking of discrete symmetries leads to domain walls. Current studies of domain…
Cosmological phase transitions, gravitational waves and self-interacting dark matter in the singlet extension of MSSM
Wenyu Wang, Ke-Pan Xie, Wu-Long Xu +1
In the minimal supersymmetric standard model (MSSM) extended by a singlet superfield, when the coupling between the singlet sector and the MSSM sector is tiny, the singlet sector c…
Probing the Electroweak Phase Transition with Exotic Higgs Decays
Marcela Carena, Jonathan Kozaczuk, Zhen Liu +5
An essential goal of the Higgs physics program at the LHC and beyond is to explore the nature of the Higgs potential and shed light on the mechanism of electroweak symmetry breakin…
Detection of Early-Universe Gravitational Wave Signatures and Fundamental Physics
Robert Caldwell, Yanou Cui, Huai-Ke Guo +34
Detection of a gravitational-wave signal of non-astrophysical origin would be a landmark discovery, potentially providing a significant clue to some of our most basic, big-picture…
Heavy Neutral Lepton Searches at the Electron-Ion Collider: A Snowmass Whitepaper
Brian Batell, Tathagata Ghosh, Tao Han +1
In this whitepaper, we consider the model of heavy neutral leptons (HNLs) as an example to explore the potential of new physics searches at the Electron-Ion Collider (EIC). We prop…
Old Phase Remnants in First Order Phase Transitions
Philip Lu, Kiyoharu Kawana, Ke-Pan Xie
First order phase transitions (FOPTs) are usually described by the nucleation and expansion of new phase bubbles in the old phase background. While the dynamics of new phase bubble…
Primordial black holes from an electroweak phase transition
Peisi Huang, Ke-Pan Xie
We propose a mechanism that forms primordial black holes (PBHs) via a first-order electroweak phase transition (FOEWPT). The FOEWPT is realized by extending the Standard Model with…
Testing leptogenesis at the LHC and future muon colliders: a scenario
Wei Liu, Ke-Pan Xie, Zihan Yi
If the masses of at least two generations of right-handed neutrinos (RHNs) are near-degenerate, the scale of leptogenesis can be as low as 100 GeV. In this work, we study pr…
Probing Higgs exotic decay at the LHC with machine learning
Sunghoon Jung, Zhen Liu, Lian-Tao Wang +1
We study the tagging of Higgs exotic decay signals using different types of deep neural networks (DNNs), focusing on the associated production channel followed by Higgs d…
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…
Primordial black holes from a cosmic phase transition: The collapse of Fermi-balls
Kiyoharu Kawana, Ke-Pan Xie
We propose a novel primordial black hole (PBH) formation mechanism based on a first-order phase transition (FOPT). If a fermion species gains a huge mass in the true vacuum, the co…
Probing the electroweak symmetry breaking with Higgs production at the LHC
Ke-Pan Xie, Bin Yan
The electroweak symmetry breaking (EWSB) mechanism is still an undecided question in particle physics. We propose to utilize the single top quark and Higgs associated production ($…
Probing electroweak phase transition with multi-TeV muon colliders and gravitational waves
Wei Liu, Ke-Pan Xie
We study the complementarity of the proposed multi-TeV muon colliders and the near-future gravitational wave (GW) detectors to the first order electroweak phase transition (FOEWPT)…
Lepton-mediated electroweak baryogenesis, gravitational waves and the final state at the collider
Ke-Pan Xie
An electroweak baryogenesis (EWBG) mechanism mediated by lepton transport is proposed. We extend the Standard Model with a real singlet scalar to trigger the strong first-o…
A New Observable for Measuring CP Property of Top-Higgs Interaction
Qing-Hong Cao, Ke-Pan Xie, Hao Zhang +1
We propose a new dihedral angle observable to measure the CP property of the interaction of top quark and Higgs boson in the production at the 14~TeV LHC. We consider t…