4 papers
Seesaw Portal to Super Heavy Dark Matter with Symmetry
Cai-Xia Yang, Zhi-Long Han, Fei Huang +2
Right-handed neutrinos 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 and heavy neutral lepton are further introduced. The Majorana mass term of…
Prospects of Portal Dark Matter in
Zhen-Wei Wang, Zhi-Long Han, Fei Huang +2
The gauged model is well-motivated to explain the muon anomaly and dark matter in previous studies. However, the latest NA64 experiment has almost exclude…
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 in the type-II seesaw at the high energy muon collider. Compared with the pair production channel…