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Journal Article

Heterotic and bosonic string amplitudes via field theory


Chiodarolia,  Marco
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;


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

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Azevedo, T., Chiodarolia, M., Johansson, H., & Schlotterer, O. (2018). Heterotic and bosonic string amplitudes via field theory. Journal of High Energy Physics, 2018(10): 12. doi:10.1007/JHEP10(2018)012.

Cite as: https://hdl.handle.net/21.11116/0000-0001-1A54-4
Previous work has shown that massless tree amplitudes of the type I and IIA/B
superstrings can be dramatically simplified by expressing them as double copies
between field-theory amplitudes and scalar disk/sphere integrals, the latter
containing all the $\alpha'$-corrections. In this work, we pinpoint similar
double-copy constructions for the heterotic and bosonic string theories using
an $\alpha'$-dependent field theory and the same disk/sphere integrals.
Surprisingly, this field theory, built out of dimension-six operators such as
$(D_\mu F^{\mu \nu})^2$, has previously appeared in the double-copy
construction of conformal supergravity. We elaborate on the $\alpha'
\rightarrow \infty$ limit in this picture and derive new amplitude relations
for various gauge-gravity theories from those of the heterotic string.