Questions tagged [amplituhedron]
A geometric object whose volume is conjectured to be related to scattering amplitudes. It is used mostly in string theory.
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3-Particle Kinematics and Parity of Operators
Recall that if the momentum of scattering amplitudes is taken to be complex and from little group scaling that the 3-particle interaction for massless particles of any spin is given as
\begin{equation}...
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"Fourier Transformation" of angle spinors to twistor variables
This relates to the derivation of equation (5.15) if Elvang and Huang's textbook. The idea is to transform the spinor helicity variables we are using, $(|i\rangle_{\dot{a}},[j|^a)$ to go into twistor ...
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N=4 Supersymmetric Ward identity
(This question pertains to exercise 4.13 of Elvang and Huang's textbook (which used to be lecture notes). This is not for a class, just to learn some new tools for work).
Consider the expansion of the ...
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Scalar QED amplitudes with BCFW Recursion Relation
(This question comes from exercise 3.5 of Elvang's and Huang's "Scattering amplitudes in Gauge Theory and Gravity" book. This is not for a class, this is to learn a new technique; albeit I ...
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Complex BCFW-shift of Parke-Taylor amplitude
(This question stems from problem 3.3 of Elvang's and Huang's "Scattering Amplitudes in Gauge Theory and Gravity" book).
Consider the Parke-Taylor amplitude given as
\begin{equation}
A_n[1^- ...
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Every possible QFT from positive geometry?
Physicist Nima Arkani-Hamed has taken an interesting approach to understand fundamental physics based on geometry (specifically, positive geometry constructions). This started with his work with ...
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