Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-08-17
Nucl.Phys.B795:105-137,2008
Physics
High Energy Physics
High Energy Physics - Theory
45 pages
Scientific paper
10.1016/j.nuclphysb.2007.11.010
We reformulate twistor-string theory as a heterotic string based on a twisted (0,2) model. The path integral localizes on holomorphic maps, while the (0,2) moduli naturally correspond to the states of N=4 super Yang-Mills and conformal supergravity under the Penrose transform. We show how the standard twistor-string formulae of scattering amplitudes as integrals over the space of curves in supertwistor space may be obtained from our model. The corresponding string field theory gives rise to a twistor action for N=4 conformal supergravity coupled to super Yang-Mills. The model helps to explain how the twistor-strings of Witten and Berkovits are related and clarifies various aspects of each of these models.
Mason Lionel
Skinner David
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