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KLT relations

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In QFT and String theory

duality in physics, duality in string theory

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The KLT relations express certain scattering amplitudes in gravity equivalently in terms of scattering amplitudes in Yang-Mills theory.

These relations are manifest in string theory-UV-completions of gravity+Yang-Mills theory, where they were originally found and from which the QFT relations have been deduced: in string theory the graviton is an excitation of the closed string and the gluon of the open string. But disk-shaped string diagram can be read in two-ways: either as a closed-string vacuum diagram or as an open-string tree-level scattering diagram. This open/closed string duality yields the KLT relations.

References

Revised on October 25, 2012 23:28:24 by Urs Schreiber (82.169.65.155)
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