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#### Heterotic and bosonic string amplitudes via field theory

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##### Fulltext (public)

1803.05452.pdf

(Preprint), 557KB

JHEP10(2018)012.pdf

(Publisher version), 727KB

##### Supplementary Material (public)

There is no public supplementary material available

##### Citation

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: http://hdl.handle.net/21.11116/0000-0001-1A54-4

##### Abstract

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.