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Exact $\nabla^4 R^4$ couplings and helicity supertraces
In type II string theory compactified on a d-dimensional torus T$^{d}$ down to D = 10−ddimensions,the ℛ$^{4}$ and ∇$^{4}$ℛ$^{4}$ four-gravitoncouplingsareknownexactly,forall values of the moduli, in terms of certain Eisenstein series of the U-duality group E$_{d}$ (ℤ). In the limit where one circle...
| Autores principales: | , |
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| Lenguaje: | eng |
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2016
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| Acceso en línea: | https://dx.doi.org/10.1007/JHEP01(2017)050 http://cds.cern.ch/record/2226938 |