Worldsheet Geometries of Ambitwistor String

Abstract

Mason and Skinner proposed the ambitwistor string theory which directly reproduces the formulas for the amplitudes of massless particles proposed by Cachazo, He and Yuan. In this paper we discuss geometries of the moduli space of worldsheets associated to the bosonic or the RNS ambitwistor string. Further, we investigate the factorization properties of the amplitudes when an internal momentum is near on-shell in the abstract CFT language. Along the way, we propose the existence of the ambitwistor strings with three or four fermionic worldsheet currents.

31 pages, publised version

References in corpus (4)

• Ambitwistor strings in 4-dimensions
• Scattering Equations and String Theory Amplitudes
• Perturbative gauge theory at null infinity
• Infrared behaviour of the one-loop scattering equations and supergravity integrands