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High Energy Theory Seminar

Friday, May 21, 2021
11:00am to 12:00pm
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From AdS/CFT to soft theorems in flat space
Eliot Hijano, Princeton University,

A holographic understanding of physics in flat space is currently lacking. In this talk, I will explore the flat limit of AdS/CFT to provide flat space with an indirect, holographic framework. The observables of physics in flat space are S-matrix elementsĀ andĀ can be obtained from a large AdS-radius limit of certain CFT correlators. I will present a method for constructing CFT operators which create incoming and outgoing scattering states in flat space. Using this method, I will obtain explicit expressions for incoming and outgoing U(1) gauge fields. Weinberg soft photon theorems then follow from Ward identities of conserved CFT currents, providing a link between CFT physics and the IR physics of flat space-times.

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