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Amplitude relations in heterotic string theory and Einstein-Yang-Mills

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Schlotterer,  Oliver
Quantum Gravity and Unified Theories, AEI Golm, MPI for Gravitational Physics, Max Planck Society;

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1608.00130.pdf
(Preprint), 383KB

JHEP11(2016)074.pdf
(Publisher version), 462KB

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Citation

Schlotterer, O. (2016). Amplitude relations in heterotic string theory and Einstein-Yang-Mills. Journal of high energy physics: JHEP, 2016(11): 074. doi:10.1007/JHEP11(2016)074.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-8FB6-7
Abstract
We present all-multiplicity evidence that the tree-level S-matrix of gluons and gravitons in heterotic string theory can be reduced to color-ordered single-trace amplitudes of the gauge multiplet. Explicit amplitude relations are derived for up to three gravitons, up to two color traces and an arbitrary number of gluons in each case. The results are valid to all orders in the inverse string tension alpha' and generalize to the ten-dimensional superamplitudes which preserve 16 supercharges. Their field-theory limit results in an alternative proof of the recently discovered relations between Einstein-Yang-Mills amplitudes and those of pure Yang-Mills theory. Similarities and differences between the integrands of the Cachazo-He-Yuan formulae and the heterotic string are investigated.