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Boundaries of Amplituhedra and NMHV Symbol Alphabets at Two Loops
Igor Prlina, Marcus Spradlin, James Stankowicz +1
In this sequel to arXiv:1711.11507 we classify the boundaries of amplituhedra relevant for determining the branch points of general two-loop amplitudes in planar su…
The Elliptic Double-Box Integral: Massless Amplitudes Beyond Polylogarithms
Jacob L. Bourjaily, Andrew J. McLeod, Marcus Spradlin +2
We derive an analytic representation of the ten-particle, two-loop double-box integral as an elliptic integral over weight-three polylogarithms. To obtain this form, we first deriv…
All-Helicity Symbol Alphabets from Unwound Amplituhedra
Igor Prlina, Marcus Spradlin, James Stankowicz +2
We review an algorithm for determining the branch points of general amplitudes in planar super-Yang-Mills theory from amplituhedra. We demonstrate how to use the re…
Correlators in the Supersymmetric SYK Model
Cheng Peng, Marcus Spradlin, Anastasia Volovich
We study correlation functions in the one-dimensional supersymmetric SYK model. The leading order 4-point correlation functions are computed by summing over ladder…