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String theory and the KLT-relations between gravity and gauge theory including external matter

N. E. J. Bjerrum-Bohr·K. Risager
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Abstract

We consider the Kawai-Lewellen-Tye (KLT) factorizations of gravity scalar-leg amplitudes into products of scalar-leg Yang-Mills amplitudes. We check and examine the factorizations at O(1) in $α'$ and extend the analysis by considering KLT-mapping in the case of generic effective Lagrangians for Yang-Mills theory and gravity.

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N. E. J. Bjerrum-Bohr, K. Risager. 2004-09-28. String theory and the KLT-relations between gravity and gauge theory including external matter. https://doi.org/10.1103/physrevd.70.086011

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