Archive of IAS Friday High Energy Theory Seminars

The last years have seen remarkable progress in understanding the scattering amplitudes of massless particles in arbitrary dimension. They exhibit structures and a simplicity completely obscured by the Feynman diagram approach, and can be shown to...

I will briefly review our current experimental knowledge of dark matter and then discuss recent developments in model building. In particular I will show that dark matter can be a thermal relic exponentially lighter than the weak scale without being...

The Ryu-Takayanagi formula and its quantum-corrected version are useful in understanding many aspects of quantum gravity such as subregion duality, emergence of the radial direction, and the generalized second law. In this talk, I will first...

I will introduce a technique in studying the analytic structure of perturbative S-matrix of QFTs. The main idea is to associate Feynman integrals to objects in a projective space: polytopes and hypersurfaces. At one loop, this reveals a universal...

I will discuss how to relate the entropy of BPSblack holes in AdS to counting of states in gaugetheory, presenting examples where this can besuccessfully done as well as examples where thisdoes not seem to work.

When a M5 branes probes the singular locus of the D,E type ALE orbifold, the M5 brane exhibits fractionation, which corresponds to activating tensor branch moduli of the 6d N=(1,0) SCFT living on the M5. I explain how the fractionation patterns can...

I review the on-shell approach to loop amplitudes, and its implementation in the BlackHat library. I present a selection of recent calculations done using the library. These include next-to-leading order calculations of electroweak vectors...

Abstract: Soft theorems for the scattering of low energy photons and gravitons and cosmological consistency relations on the squeezed-limit correlation functions are both understood to be consequences of invariance under large gauge transformations...