The One-loop Open Superstring Massless Five-point Amplitude with the Non-Minimal Pure Spinor Formalism

Details The One-loop Open Superstring Massless Five-point Amplitude with the Non-Minimal Pure Spinor Formalism The One-loop Open Superstring Massless Five-point Amplitude with the Non-Minimal Pure Spinor Formalism

2009-02-10

arxiv.org/abs/0902.1539v2

JHEP 0903:126,2009

Physics

High Energy Physics

High Energy Physics - Theory

38 pages, harvmac TeX, v2: fix typo in (4.2) and add reference

Scientific paper

10.1088/1126-6708/2009/03/126

We compute the massless five-point amplitude of open superstrings using the non-minimal pure spinor formalism and obtain a simple kinematic factor in pure spinor superspace, which can be viewed as the natural extension of the kinematic factor of the massless four-point amplitude. It encodes bosonic and fermionic external states in supersymmetric form and reduces to existing bosonic amplitudes when expanded in components, therefore proving their equivalence. We also show how to compute the kinematic structures involving fermionic states.

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