A Chiral Perturbation Expansion for Gravity

Details A Chiral Perturbation Expansion for Gravity A Chiral Perturbation Expansion for Gravity

2005-11-18

arxiv.org/abs/hep-th/0511189v2

JHEP0602:057,2006

Physics

High Energy Physics

High Energy Physics - Theory

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

Scientific paper

10.1088/1126-6708/2006/02/057

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.

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