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High Energy Theory artwork
November 14, 20222:00 pm – 3:00 pm (CDT)

Geometry in Scattering Amplitudes


Andreas Helset (California Institute of Technology)


Haoyu Zhang



Mitchell Institute for Fundamental Physics & Astronomy

College Station, Texas 77843

Event Details

One central property of the S-matrix is its invariance under field redefinitions. I will discuss how the geometry of field space makes this invariance manifest. This geometric formulation also has practical consequences. Scattering amplitudes and the renormalization group equations for a theory of scalars and gauge bosons only depend on geometric quantities. Also, the scattering amplitudes satisfy a geometric soft theorem.

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