# High Energy Theory Seminar

Online and In-Person Event

Nonperturbative scattering amplitudes from dispersive iterations of unitarity

Alexander Zhiboedov

*,*CERN*,* I will discuss a computational scheme that allows to construct relativistic scattering

amplitudes that obey analyticity, crossing, elastic and inelastic unitarity in three and four spacetime dimension.

I will present the results of numerical implementation of this scheme. The amplitude functions we

obtain in this way exhibit interesting properties: particle production, Landau curves, nontrivial

Regge limit, logarithmic running. I will comment on the relation to the S-matrix bounds derived by other methods.

In person attendees (469 Lauritsen) must have a valid Caltech ID.

Contact theoryinfo@caltech.edu for Zoom information.

For more information, please visit http://www.theory.caltech.edu/seminars/high-energy-theory-seminars.