Abstract
We consider type II string compactifications on Calabi-Yau orientifolds with fluxes and D-branes, and analyse the F-term scalar potential that simultaneously involves closed and open string modes. In type IIA models with D6-branes this potential can be directly computed by integrating out Minkowski three-forms. The result shows a multi-branched structure along the space of lifted open string moduli, in which discrete shifts in special Lagrangian and Wilson line deformations are compensated by changes in the RR flux quanta. The same sort of discrete shift symmetries are present in the superpotential and constrain the Kähler potential. As for the latter, inclusion of open string moduli breaks the factorisation between complex structure and Kähler moduli spaces. Nevertheless, the 4d Kähler metrics display a set of interesting relations that allow to rederive the scalar potential analytically. Similar results hold for type IIB flux compactifications with D7-brane Wilson lines.
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ArXiv ePrint: 1606.00508
La Caixa-Severo Ochoa Scholar. (Federico Carta)
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Carta, F., Marchesano, F., Staessens, W. et al. Open string multi-branched and Kähler potentials. J. High Energ. Phys. 2016, 62 (2016). https://doi.org/10.1007/JHEP09(2016)062
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DOI: https://doi.org/10.1007/JHEP09(2016)062