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Matching the $D^{6}R^{4}$ interaction at two-loops
The coefficient of the $D^6 {\cal R}^4$ interaction in the low energy expansion of the two-loop four-graviton amplitude in type II superstring theory is known to be proportional to the integral of the Zhang-Kawazumi (ZK) invariant over the moduli space of genus-two Riemann surfaces. We demonstrate t...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2014
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1007/JHEP01(2015)031 http://cds.cern.ch/record/1956983 |