New Ambitwistor String Theories

Abstract

We describe new ambitwistor string theories that give rise to the recent amplitude formulae for Einstein-Yang-Mills, (Dirac)-Born-Infeld, Galileons and others introduced by Cachazo, He and Yuan. In the case of the Einstein-Yang-Mills amplitudes, an important role is played by a novel worldsheet conformal field theory that provides the appropriate colour factors precisely without the spurious multitrace terms of earlier models that had to be ignored by hand. This is needed to obtain the correct multitrace terms that arise when Yang-Mills is coupled to gravity.

34 pages, 2 figures, 5 tables. v2: minor changes, published version

References in corpus (8)

• New Relations for Gauge-Theory Amplitudes
• Effective Field Theories from Soft Limits
• Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles
• Gravity from Rational Curves
• A Hidden Symmetry of the Galileon
• CHY representations for gauge theory and gravity amplitudes with up to three massive particles
• Twistor Strings for N=8 Supergravity
• Scattering equations and virtuous kinematic numerators and dual-trace functions

Cited by in corpus (6)

• Einstein-Yang-Mills from pure Yang-Mills amplitudes
• Factorization of Chiral String Amplitudes
• An Algebraic Approach to the Scattering Equations
• Double-soft behavior for scalars and gluons from string theory
• Spontaneously Broken Yang-Mills-Einstein Supergravities as Double Copies
• CHY-construction of Planar Loop Integrands of Cubic Scalar Theory