Abstract
Massive type IIA flux compactifications of the form AdS4 × X6, where X6 admits a Calabi-Yau metric and O6-planes wrapping three-cycles, display families of vacua with parametric scale separation between the compactification scale and the AdS4 radius, generated by an overall rescaling of internal four-form fluxes. For toroidal orbifolds one can perform two T-dualities and map this background to an orientifold of massless type IIA compactified on an SU(3)-structure manifold with fluxes. Via a 4d EFT analysis, we generalise this last construction and embed it into new branches of supersymmetric and non-supersymmetric vacua with similar features. We apply our results to propose new infinite families of vacua based on elliptic fibrations with metric fluxes. Parametric scale separation is achieved by an asymmetric flux rescaling which, however, in general is not a simple symmetry of the 4d equations of motion. At this level of approximation the vacua are stable but, unlike in the Calabi-Yau case, they display a non-universal mass spectrum of light fields.
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Acknowledgments
We thank Alberto Castellano, Luca Melotti, Miguel Montero, Raffaelle Savelli, Ángel Uranga, Irene Valenzuela and Max Wiesner for discussions. This work is supported through the grants EUREXCEL_03 funded by CSIC, and CEX2020-001007-S and PID2021-123017NB-I00, funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe. R. C. is supported through the JAE Intro grant JAEINT_21_02330. D. P. is supported through the grant FPU19/04298 funded by MCIN/AEI/10.13039/501100011033 and by ESF Investing in your future, and would like to thank CERN-TH for hospitality during the development of this work.
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Carrasco, R., Coudarchet, T., Marchesano, F. et al. New families of scale separated vacua. J. High Energ. Phys. 2023, 94 (2023). https://doi.org/10.1007/JHEP11(2023)094
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DOI: https://doi.org/10.1007/JHEP11(2023)094