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- W2688392218 abstract "The role of the $overline{rm D3}$ brane in providing de Sitter vacua with spontaneously broken supersymmetry in the KKLT construction is clarified. The first step in this direction was explained in arXiv:hep-th/0301240, arXiv:hep-th/0308055: it was shown there that in the GKP background the bosonic contributions to the vacuum energy from the DBI and WZ term cancel for a D3 brane, but double for a $overline{rm D3}$ brane, leading to de Sitter vacua. The next step was taken in arXiv:1411.1121 where the analogous mechanism of the doubling (cancelation) of the $overline{rm D3}$ (D3) DBI and WZ terms was discovered in the presence of Volkov-Akulov fermions living on the brane, in a flat supergravity background. Here we confirm this mechanism of doubling/cancelation for the $overline{rm D3}$/D3 brane in the GKP supergravity background preserving $mathcal{N}=1$, $d=4$ supersymmetry. We find that imaginary self-dual $G_{(3)}$ flux of type $(2,1)$ nicely removes the $SU(3)$ fermion triplet by giving it a large mass, while leaving the Volkov-Akulov goldstino, which is the $SU(3)$ singlet, massless. This makes the de Sitter landscape in D-brane physics clearly related to de Sitter vacua in effective $d=4$ supergravity with a nilpotent multiplet and spontaneously broken supersymmetry." @default.
- W2688392218 created "2017-06-30" @default.
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- W2688392218 date "2015-05-01" @default.
- W2688392218 modified "2023-10-17" @default.
- W2688392218 title "D 3 ¯ $$ overline{mathrm{D}3} $$ and dS" @default.
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- W2688392218 doi "https://doi.org/10.1007/jhep05(2015)058" @default.
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