Abstract
We construct new string vacua featuring Brane Supersymmetry Breaking, based on T4/ℤN orientifolds with O5+ planes and \( \overline{\textrm{D}5} \) branes. Differently from the original construction, in these vacua the cancellation of twisted R-R charges of D-branes and orientifold planes is achieved in a non-trivial way, and results in rigid configurations with few open-string moduli, which highly restrict the possible deformations of the model. The breaking of supersymmetry and, consequently, the non-vanishing untwisted and twisted NS-NS tadpoles, generates a rich potential both for the dilaton and the blown-up moduli.
We also uncover the stringy origin of the J form entering the gauge kinetic functions in the low-energy effective action, and display its relation to the NS-NS tadpoles for the scalars in the tensor multiplets. As a result, the J form can be consistently identified also when supersymmetry is broken, thus solving an embarrassing puzzle related to its very existence. We also discuss the unitarity constraints for one-dimensional defects in these vacua, where the Kač-Moody algebra for D9 and \( \overline{\textrm{D}5} \) can be realised both in the left-moving and right-moving sectors.
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Acknowledgments
We are grateful to Marco Meineri, Gianfranco Pradisi, Fabio Riccioni and Augusto Sagnotti for valuable discussions. C.A. and G.L. would like to thank CPHT of Ecole Polytechnique and the Theory Department at CERN for their kind hospitality during various stages of this work. G.L. would also like to thank the Max-Planck Institute of Munich for its kind hospitality. C.C. was supported by project “Nucleu” PN 23210101/2024.
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Angelantonj, C., Condeescu, C., Dudas, E. et al. Rigid vacua with Brane Supersymmetry Breaking. J. High Energ. Phys. 2024, 103 (2024). https://doi.org/10.1007/JHEP04(2024)103
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DOI: https://doi.org/10.1007/JHEP04(2024)103