A chiral perturbation expansion for gravity | Zendy

Mohab Abou-Zeid | Zendy; C.M. Hull | Zendy

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A chiral perturbation expansion for gravity

Author(s) -

Mohab Abou-Zeid,

C.M. Hull

Publication year - 2006

Publication title -

journal of high energy physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.998

H-Index - 261

eISSN - 1126-6708

pISSN - 1029-8479

DOI - 10.1088/1126-6708/2006/02/057

Subject(s) - twistor space , twistor theory , mathematical physics , string theory , physics , amplitude , holomorphic function , perturbation theory (quantum mechanics) , theoretical physics , einstein , perturbation (astronomy) , mathematics , mathematical analysis , quantum mechanics

A formulation of Einstein gravity, analogous to that for gauge theory arisingfrom the Chalmers-Siegel action, leads to a perturbation theory about anasymmetric weak coupling limit that treats positive and negative helicitiesdifferently. We find power counting rules for amplitudes that suggest thetheory could find a natural interpretation in terms of a twistor-string theoryfor gravity with amplitudes supported on holomorphic curves in twistor space.Comment: 11 pages, LaTeX, no figures; v2: one reference adde

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