Theoretical High Energy Seminar – Niels Bohr Institute - University of Copenhagen

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Theoretical High Energy Seminar

Speaker: Oliver Schlotterer, Max Planck Institute, Munich

Title:  Gauge multiplet tree amplitudes in pure spinor superspace

Abstract:  The pure spinor formalism is an alternative formulation of superstring
theory which -- unlike the Ramond Neveu-Schwarz- and Green Schwarz
frameworks -- maintains manifest Super Poincare symmetry in all steps of
scattering calculations. I will first of all present basics of the pure
spinor formalism, identify its worldsheet degrees of freedom and explain the
prescription towards superstring tree level amplitudes of the ten
dimensional N=1 SYM multiplet in pure spinor superspace. Then, I will
present the superstring amplitudes up to 6pt (arXiv:1011.0994) in an
organization scheme based on BRST cohomology which admits a dictionary
between Feynman diagrams and superspace expressions. Using these BRST
building blocks, we could find the n-point generalization of the field
theory amplitude which exhibits a recursive structure in the spirit of BCFW