Description |
We show how flat space S-matrix elements can be elegantly extracted
from correlation functions in AdS/CFT. In particular, we show that the
(d+1) dimensional flat-space amplitude of gravitons or gluons can be
obtained as the coefficient of a particular singularity of the
d-dimensional correlator of the stress-tensor or a conserved current
Fourier transformed to momentum space. After establishing this method
at tree-level, we discuss how it could be used at arbitrary order in
perturbation theory.
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