Landau Singularities and the Amplituhedron

 Modern methods for computing scattering amplitudes in quantum field theory get enormous mileage out of knowledge (or assumed knowledge) of their singularity structure.  I will demonstrate how, in the very special case of supersymmetric Yang-Mills theory, all information about this singularity structure can (in principle) be derived via combinatorial geometry problems using the amplituhedron, providing thereby the basic input to the "amplitude bootstrap" program.
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Leinweber Center for Theoretical Physics,
Nov 1, 2017, 5:56 AM