Twistor Strings for N=8 Supergravity

Abstract

This paper presents a worldsheet theory describing holomorphic maps to twistor space with N fermionic directions. The theory is anomaly free when N=8. Via the Penrose transform, the vertex operators correspond to an N=8 Einstein supergravity multiplet. In the first instance, the theory describes gauged supergravity in AdS_4. Upon taking the flat space, ungauged limit, the complete classical S-matrix is recovered from worldsheet correlation functions.

53 pages

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• The polarized scattering equations for 6d superamplitudes
• Spinor-Helicity Formalism for Massless Fields in AdS${}_4$
• Twistor methods for AdS${}_5$
• A note on connected formula for form factors
• From 4d Ambitwistor Strings to On Shell Diagrams and Back
• Spinor-Helicity Formalism for Massless Fields in AdS${}_4$ II: Potentials
• Gravity with a cosmological constant from rational curves
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• Chiral Splitting and $\mathcal{N}=4$ Einstein--Yang--Mills Tree Amplitudes in 4d
• Twistors and antipodes in de Sitter space
• New Worldsheet Formulae for Conformal Supergravity Amplitudes
• Ambitwistor Strings in Six and Five Dimensions
• New Ambitwistor String Theories
• Conformal higher-spin symmetries in twistor string theory
• Twistor action for general relativity
• Four Dimensional Anomaly-Free Twistor String
• Spectrum, Scattering Amplitudes, and String Field Theory of 4 Dimensional Twistor String
• Superstring/Supergravity Mellin Correspondence in Grassmannian Formulation
• A Note on Classical Aspects of the Four Dimensional Anomaly-Free Twistor String
• Ambitwistor strings and amplitudes in curved backgrounds