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Complete N-Point Superstring Disk Amplitude II. Amplitude and Hypergeometric Function Structure
Carlos R. Mafra, Oliver Schlotterer, Stephan Stieberger
Using the pure spinor formalism in part I [1] we compute the complete tree-level amplitude of N massless open strings and find a striking simple and compact form in terms of minima…
Complete N-Point Superstring Disk Amplitude I. Pure Spinor Computation
Carlos R. Mafra, Oliver Schlotterer, Stephan Stieberger
In this paper the pure spinor formalism is used to obtain a compact expression for the superstring N-point disk amplitude. The color ordered string amplitude is given by a sum over…
Explicit BCJ Numerators from Pure Spinors
Carlos R. Mafra, Oliver Schlotterer, Stephan Stieberger
We derive local kinematic numerators for gauge theory tree amplitudes which manifestly satisfy Jacobi identities analogous to color factors. They naturally emerge from the low ener…