Flat Monodromies and a Moduli Space Size Conjecture

Abstract : We investigate how super-Planckian axions can arise when type IIB 3-form flux is used to restrict a two-axion field space to a one-dimensional winding trajectory. If one does not attempt to address notoriously complicated issues like Kähler moduli stabilization, SUSY-breaking and inflation, this can be done very explicitly. We show that the presence of flux generates flat monodromies in the moduli space which we therefore call ‘Monodromic Moduli Space’. While we do indeed find long axionic trajectories, these are non-geodesic. Moreover, the length of geodesics remains highly constrained, in spite of the (finite) monodromy group introduced by the flux. We attempt to formulate this in terms of a ‘Moduli Space Size Conjecture’. Interesting mathematical structures arise in that the relevant spaces turn out to be fundamental domains of congruence subgroups of the modular group. In addition, new perspectives on inflation in string theory emerge.
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Soumis le : jeudi 21 décembre 2017 - 00:17:51
Dernière modification le : mercredi 12 décembre 2018 - 07:36:40

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Arthur Hebecker, Philipp Henkenjohann, Lukas Witkowski. Flat Monodromies and a Moduli Space Size Conjecture. JHEP, 2017, 12, pp.033. 〈10.1007/JHEP12(2017)033〉. 〈hal-01669736〉



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