Zhi-Long Han

Gauge Interactions Involving New Vector and Pseudoscalar Particles

Ruiyu Xing, Honglei Li, Zhi-Long Han +3

The Vector gauge bosons $Z^{'}$ and axion-like particles (ALPs) $a$ are predicted by the $U (1)_{X}$ gauge extension and Peccei-Quinn (PQ) models, respectively. We focus on the interacti…

Dark photon portal dark matter with low-temperature reheating

Zhi-Long Han, Honglei Li, Ang Liu +2

The dark photon $A^{'}$ is widely considered as the mediator of dark matter $χ$ . In the conventional non-resonance benchmark scenario with $m_{A^{'}} / m_{χ} = 3$ , the kinetic mixing $ε$ requi…

$Z^{'}$ Portal Dark Matter with Observable $Δ N_{eff}$

Ang Liu, Zhi-Long Han, Fei Huang

In the conventional $Z^{'}$ portal dark matter scenario, the prediction of detectable dark matter $χ$ typically relies on the collider sensitivities of $Z^{'}$ and direct det…

New Avenues of Heavy Neutral Lepton at Muon Collider

Fa-Xin Yang, Feng-Lan Shao, Zhi-Long Han +1

With initial state radiation, the multi-TeV muon collider can be regarded as an electroweak boson collider. The dominant production mode of the certain process becomes the vector b…

Same-Sign Tetralepton Signature at $μ$ TRISTAN

Lin-Kun Yan, Zhi-Long Han, Feng-Lan Shao +1

Naturally tiny neutrino masses can be explained by the low scale seesaw with heavy neutral lepton $N$ coupling to the neutrinophilic Higgs doublet $Φ_{ν}$ , which obtains a much small…

Novel Signatures of Heavy Neutral Lepton at Muon Collider

Xue-Xin Zhang, Zhi-Long Han, Fei Huang +1

The Higgs-strahlung process $ℓ^{+} ℓ^{-} \to Z h$ is one of the most important production channels of the standard model Higgs boson $h$ at the lepton colliders. The cross section…

Study the property of $W^{'}$ at future $e^{-} p$ collider

Xinyi Yan, Honglei Li, Zhi-Long Han +2

As a strong candidate for new physics beyond the Standard Model, the exotic charged gauge boson $W^{'}$ has attracted extensive research interest. In this work we investigate…

Collider Probes of Four-Lepton Final States in Maximally Flavor-Violating $U (1)_{L_{μ} - L_{τ}}$ Model

Jianing Qin, Fei Huang, Honglei Li +2

We investigate the collider signatures of the maximally flavor-violating $U (1)_{L_{μ} - L_{τ}}$ model, where a new gauge boson $Z^{'}$ and scalar triplets induce lepton flavor-changin…

Reviving $Z^{'}$ Portal Dark Matter with Conversion Mechanism

Zhen-Wei Wang, Zhi-Long Han, Fei Huang +2

In many new physics models with extended gauge symmetry, the new gauge boson $Z^{'}$ could mediate the interactions between the dark matter and standard model particles. For the conve…

Coscattering Dark Matter in the Inverse Scotogenic Models

Ang Liu, Zhi-Long Han, Fei Huang +2

The Scotogenic mechanism is an appealing pathway to naturally explain the common origin of dark matter and tiny neutrino mass. However, the conventional scotogenic dark matter usua…

Seesaw Portal to Super Heavy Dark Matter with $Z_{3}$ Symmetry

Cai-Xia Yang, Zhi-Long Han, Fei Huang +2

Right-handed neutrinos $N$ are introduced to explain the origin of the tiny neutrino masses via the seesaw mechanism. Required by relatively large Yukawa coupling and leptogenesis,…

Lepton Number Violation Higgs Decay at Muon Collider

Fa-Xin Yang, Feng-Lan Shao, Zhi-Long Han +3

In this paper, we consider the scalar singlet extension of type-I seesaw, where a scalar singlet $S$ and heavy neutral lepton $N$ are further introduced. The Majorana mass term of…

Prospects of $Z^{'}$ Portal Dark Matter in $U (1)_{L_{μ} - L_{τ}}$

Zhen-Wei Wang, Zhi-Long Han, Fei Huang +2

The gauged $U (1)_{L_{μ} - L_{τ}}$ model is well-motivated to explain the muon $g - 2$ anomaly and dark matter in previous studies. However, the latest NA64 $μ$ experiment has almost exclude…

Research of Extra Charged Gauge Boson $W^{'}$ in Alternative Left-Right Model at Future Muon Collider

Liuxin Zhao, Honglei Li, Zhi-Long Han +2

The study of extra charged gauge boson beyond the Standard Model has always been of great interest. Future muon colliders will have a significant advantage in discovering exotic pa…

Conversion-Driven Dark Matter in $U (1)_{B - L}$

Jing-Jing Zhang, Zhi-Long Han, Ang Liu +1

The new gauge boson $Z^{'}$ in $U (1)_{B - L}$ is widely considered as the mediator of dark matter. In this paper, we propose the conversion-driven dark matter in $U (1)_{B - L}$ . The dark…

Single Production of Doubly Charged Higgs at Muon Collider

Jie-Cheng Jia, Zhi-Long Han, Fei Huang +2

In this paper, we study the single production of doubly charged Higgs $H^{\pm\pm}$ in the type-II seesaw at the high energy muon collider. Compared with the pair production channel…

Phenomenological study of heavy neutral gauge boson in the left-right symmetric model at future muon collider

Zongyang Lu, Jianing Qin, Honglei Li +5

The exotic neutral gauge boson is a powerful candidate for the new physics beyond the standard model. As a promising model, the left-right symmetric model has been proposed to expl…

Common Origin of Dark Matter and Leptogenesis in $U (1)_{B - L}$

Ang Liu, Feng-Lan Shao, Zhi-Long Han +2

In this paper, we investigate the common parameter space of dark matter and leptogenesis in the $U (1)_{B - L}$ symmetry. This model involves a complex scalar $ϕ$ , sterile neutrinos $…

Displaced Heavy Neutral Lepton from New Higgs Doublet

Fa-Xin Yang, Feng-Lan Shao, Zhi-Long Han +2

Heavy neutral leptons $N$ are introduced to explain the tiny neutrino masses via the seesaw mechanism. For proper small mixing parameter $V_{ℓ N}$ , the heavy neutral leptons $N$ …