A Chiral Perturbation Expansion for Gravity

Abstract

A formulation of Einstein gravity, analogous to that for gauge theory arising from the Chalmers-Siegel action, leads to a perturbation theory about an asymmetric weak coupling limit that treats positive and negative helicities differently. We find power counting rules for amplitudes that suggest the theory could find a natural interpretation in terms of a twistor-string theory for gravity with amplitudes supported on holomorphic curves in twistor space.

11 pages, LaTeX, no figures; v2: one reference added

References in corpus (12)

• Perturbative Gauge Theory As A String Theory In Twistor Space
• An Alternative String Theory in Twistor Space for N=4 Super-Yang-Mills
• Conformal Supergravity in Twistor-String Theory
• The self-dual sector of QCD amplitudes
• The N=2(4) string is self-dual N=4 Yang-Mills
• Cubic Twistorial String Field Theory
• MHV-Vertices for Gravity Amplitudes
• A cubic action for self-dual Yang-Mills
• Self-Dual N=8 Supergravity as Closed N=2(4) Strings
• A Note on Twistor Gravity Amplitudes
• A Note on MHV Amplitudes for Gravitons
• Covariant field theory for self-dual strings

Cited by in corpus (10)

• Gravity, Twistors and the MHV Formalism
• Actions for Self-dual Higher Spin Gravities
• Twistor Actions for Self-Dual Supergravities
• Chiral approach to massive higher spins
• Superspace formulations of the (super)twistor string
• Gauge independent kinematic algebra of self-dual Yang-Mills theory
• Flat Self-dual Gravity
• Minimal models of field theories: Chiral Higher Spin Gravity
• Einstein Supergravity and New Twistor String Theories
• Minimal models of field theories: SDYM and SDGR