Theory Seminar

Theory seminars take place Monday afternoons at 2:10 PM in the Pupin Hall Theory Center on the 8th floor.

"Finding structure in the dark: coupled dark energy models and the mildly nonlinear regime"

Monday, November 20, 2017 - 2:10pm

Mark Trodden

Department of Physics & Astronomy, University of Pennsylvania

"Finding structure in the dark: coupled dark energy models and the mildly nonlinear regime"

I will discuss the theory behind, and constraints on, interactions between the dark sectors of cosmology.

"Unification from Scattering Amplitudes"

Monday, November 27, 2017 - 2:10pm

Clifford Cheung

Caltech

"Unification from Scattering Amplitudes"

The modern S-matrix program offers an elegant approach to bootstrapping quantum field theories without the aid of an action.  While most progress has centered on gravity and gauge theory, similar ideas apply to effective field theories (EFTs).  Sans reference to symmetry or symmetry breaking, we show how certain EFTs can be der

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