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Colloquium

Title: Cosmological Neutrinos

Speaker: Ue-Li Pen, Canadian Institute for Theoretical Astrophysics

Location: Room 111, Physics Building

Time: 15:00-16:00, Wed, Oct. 25, 2017

Abstract:

I describe the cosmic neutrino background, and non-linear gravitational effects that may allow us to detect its presence.  In the present day universe, it contributes as hot dark matter, which perturbs the cold dark matter. In the early universe, it controls the evolution of early universe shock waves, and properties of primordial black holes. I will speculate on potential connections to Gamma Ray Bursts.The Higgs boson plays an indispensable role in particle physics. It's discovery completes the Standard Model as we know. It also brings "uncertain" future. In this talk, I will review the history of the searches, the discovery in 2012,  and the current property measurements of the Higgs boson. I will also discuss future prospects and opportunities.

Biography:

Dr. Ue-Li Pen is a professor and the director of Canadian Institute for Theoretical Astrophysics (CITA). His area of research is theoretical astrophysics. He study systems where basic physical effects can be isolated from astronomical complexities. His works include cosmic string, numerical simulations (hydro, MHD, N-body), weak lensing, the Sunyaev Zel'dovich effect and other large scale structures of the universe, neutron stars/GRBs/FRBs, etc.  Current projects include the non-linear dynamics of the cosmic neutrino background, 21cm intensity mapping, pulsar VLBI scintillometry, and Canadian Hydrogen Intensity Mapping Experiment CHIME.