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On the stability of open-string orbifold models with broken supersymmetry.

Abel, Steven and Coudarchet, Thibaut and Partouche, Hervé (2020) 'On the stability of open-string orbifold models with broken supersymmetry.', Nuclear physics B., 957 . p. 15100.


We consider an open-string realisation of spontaneous breaking of supersymmetry in four-dimensional Minkowski spacetime. It is based on type IIB orientifold theory compactified on , with Scherk–Schwarz supersymmetry breaking implemented along . We show that in the regions of moduli space where the supersymmetry breaking scale is lower than the other scales, there exist configurations with minima that have massless Bose-Fermi degeneracy and hence vanishing one-loop effective potential, up to exponentially suppressed corrections. These backgrounds describe non-Abelian gauge theories, with all open-string moduli and blowing up modes of stabilized, while all untwisted closed-string moduli remain flat directions. Other backgrounds with strictly positive effective potentials exist, where the only instabilities arising at one loop are associated with the supersymmetry breaking scale, which runs away. All of these backgrounds are consistent non-perturbatively.

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Publisher statement:© 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
Date accepted:07 June 2020
Date deposited:15 July 2020
Date of first online publication:27 June 2020
Date first made open access:15 July 2020

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