Heterotic-Type I Dual Pairs, Rigid Branes and Broken Susy
arXiv:1912.12062 · doi:10.1016/j.nuclphysb.2020.114976
Abstract
The moduli space of toroidal type I vacua, which are consistent at the non-perturbative level, consists of independent branches characterized by the number (0, 16 or 32) of rigid branes sitting on top of orientifold planes. This structure persists also when supersymmetry is spontaneously broken a la Scherk-Schwarz. We show that all the components of the moduli space in dimension indeed admit heterotic dual components, by explicitly constructing heterotic-type I dual pairs with the rank of the gauge group reduced by 0, 8 or 16 units. In the presence of spontaneous breaking of supersymmetry, the dual pairs we consider are also free of tachyonic instabilities at the one-loop level, provided the scale of supersymmetry breaking is lower than the string scale.
arXiv comment1+30 pages, minor corrections, one reference added. Accepted Version in Nucl.Phys.B
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