Computations of superstring amplitudes in pure spinor formalism via Cadabra
arXiv:1607.00463
Abstract
The discovery of pure spinor formalism makes the computation of superstring scattering amplitudes possible. In this paper, we will illustrate how computer algebra system Cadabra is used in computing the supersymmetric amplitude in pure spinor formalism and provide the source code that computes the tree-level massless 5-gluon amplitude.
23 pages,3 figure.v1-v5:comments are added, several mistakes are corrected, some references are added