Conformal Supergravity Tree Amplitudes from Open Twistor String Theory

Details Conformal Supergravity Tree Amplitudes from Open Twistor String Theory Conformal Supergravity Tree Amplitudes from Open Twistor String Theory

2008-11-09

arxiv.org/abs/0811.1341v2

Nucl.Phys.B819:375-399,2009

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, expanded version, references added

Scientific paper

10.1016/j.nuclphysb.2009.04.003

We display the vertex operators for all states in the conformal supergravity sector of the twistor string, as outlined by Berkovits and Witten. These include `dipole' states, which are pairs of supergravitons that do not diagonalize the translation generators. We use canonical quantization of the open string version of Berkovits, and compute N-point tree level scattering amplitudes for gravitons, gluons and scalars. We reproduce the Berkovits-Witten formula for maximal helicity violating (MHV) amplitudes (which they derived using path integrals), and extend their results to the dipole pairs. We compare these trees with those of Einstein gravity field theory.

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