Speaker: Prof. Hong-Jian He (Shanghai Jiao Tong University)
Time: Dec.15,2025,Monday 10:30 AM
Location: Lecture Hall 9409

Abstract:
The Origin of Mass is a most profound puzzle in physics. In this talk, I first discuss the origin of mass fromthe 4d Higgs mechanism of the standard model (S), especially, the mass-generation of light neutrinos(introduced by Pauli) in connection to the right-handed neutrinos serving as the last missing piece of the SMand their cosmological non-Gaussian signatures from inflation. Then, l discuss the geometric mass.generation of the Kaluza-Klein (KK) gauge/gravity and string theories, and the topological mass-generationof the 3d Chern-Smions gauge/gravity theories. I will highlight a truly profound relation, (Gravity)(Guage Theory)2 , which points to the fundamental clues to the deep gauge-gravity connection and theirunification.

Speaker Profile:
Professor He is an elected APS Fellow, a distinguished professor at T, D, Lee Institute of SITUf and adjunctprofessor at Tsinghua University. He studies particle physics, quantum gravity, cosmology and theiiinterface. He was awarded the Asia Achivement Award (Robert T, Poe Prize), Gan-Chang Wang PhysicsPrize, China Youth Science and Technology Prize, and Outstanding Junior Research Grant Award. ProfessoiHe worked at DESY National Laboratory (Germany), University of Texas at Austin (USA), Michigan StateUniversity (USA ), and Tsinghua University, He is currently on the editorial boards of international journalsincluding Physics of the Dark Universe (Elsevier), Nuclear Physics B (Elsevier), and Research (Beijing).