A Note on Graviton Amplitudes for New Twistor String Theories

Abstract

A new class of twistor string theories were recently constructed by Abou-Zeid, Hull and Mason. The most interesting one of these theories has the particle content of N=8 supergravity. Arguments are given for the vanishing of the (+ - -)-helicity amplitude for gravitons which suggest that this theory describes a chiral N=8 supergravity rather than Einstein supergravity.

10 pages

References in corpus (12)

• Perturbative Gauge Theory As A String Theory In Twistor Space
• On the Relationship between Yang-Mills Theory and Gravity and its Implication for Ultraviolet Divergences
• Three-Loop Superfiniteness of N=8 Supergravity
• An Alternative String Theory in Twistor Space for N=4 Super-Yang-Mills
• Conformal Supergravity in Twistor-String Theory
• Unexpected Cancellations in Gravity Theories
• Inherited Twistor-Space Structure of Gravity Loop Amplitudes
• Cubic Twistorial String Field Theory
• MHV-Vertices for Gravity Amplitudes
• Self-Dual N=8 Supergravity as Closed N=2(4) Strings
• A Note on MHV Amplitudes for Gravitons
• Self-Dual Super-Yang-Mills as a String Theory in $(x,\theta )$ Space

Cited by in corpus (14)

• Gravity, Twistors and the MHV Formalism
• The Tree Formula for MHV Graviton Amplitudes
• Scattering Amplitudes and Wilson Loops in Twistor Space
• Twistor Actions for Self-Dual Supergravities
• Twistor Strings for N=8 Supergravity
• The String Dual to Free $\mathcal{N}=4$ Super Yang-Mills
• The Worldsheet Dual of Free Super Yang-Mills in 4D
• Einstein supergravity amplitudes from twistor-string theory
• Twistor actions for gauge theory and gravity
• Twistor-strings and gravity tree amplitudes
• New Twistor String Theories revisited
• Holonomies of gauge fields in twistor space 2: Hecke algebra, diffeomorphism, and graviton amplitudes
• Twistors, strings and supersymmetric gauge theories
• String theory in twistor space and minimal tension holography