Results 81 to 90 of about 657 (140)
On scale separation in type II AdS flux vacua
Journal of High Energy Physics, 2020 We study the separation of AdS and Kaluza-Klein (KK) scales in type II 4d AdS orientifold vacua. We first address this problem in toroidal/orbifold type IIA vacua with metric fluxes, corresponding to compactifications in twisted tori, both from the 4d ...
Anamaría Font +2 more
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Anomalous U(1)s in Type I superstring vacua
, 2002 We perform a systematic string computation of the masses of anomalous U(1) gauge bosons in four-dimensional orientifold vacua, and we study their localization properties in the internal (compactified) space. We find that N=1 supersymmetric sectors yield four-dimensional contributions, localized in the whole six-dimensional internal space, while N=2 ...
Antoniadis, I., Kiritsis, E., Rizos, J.
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Journal of High Energy PhysicsWe propose to use the winding number of the gradient of a scalar potential as a simple topological index that relates critical points in the interior of the scalar field space to the behavior of the potential at the (asymptotic) boundary of the field ...
Severin Lüst
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Symmetry points of N = 1 $$ \mathcal{N}=1 $$ modular geometry
Journal of High Energy PhysicsWe consider 4d N = 1 $$ \mathcal{N}=1 $$ supergravity theories with modular symmetry, where the modulus τ is the upper half-plane modulo SL(2, Z) action.
Amineh Mohseni, Cumrun Vafa
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A positive metric over DGKT vacua
Journal of High Energy PhysicsWe study the notion of a metric over the space of AdS solution in string theory, leading to an associated distance between them. Such a distance is the idea underlying the AdS distance conjecture.
Eran Palti, Nicolò Petri
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Geometrical Construction of Type I Superstring Vacua
, 1997 12 pages, latex, no figures; contribution to the Proceedings of the 12th Italian Conference on General Relativity and Gravitational Physics, Rome, september 23-27 ...
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Systematics of type IIA moduli stabilisation
Journal of High Energy Physics, 2020 We analyse the flux-induced scalar potential for type IIA orientifolds in the presence of p-form, geometric and non-geometric fluxes. Just like in the Calabi-Yau case, the potential presents a bilinear structure, with a factorised dependence on axions ...
Fernando Marchesano +3 more
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Large field ranges from aligned and misaligned winding
Journal of High Energy Physics, 2019 We search for effective axions with super-Planckian decay constants in type IIB string models. We argue that such axions can be realised as long winding trajectories in complex-structure moduli space by an appropriate flux choice.
Arthur Hebecker +2 more
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Stability of vacua and domain walls in supergravity and superstring theory
AIP Conference Proceedings, 1992 6 pages, UPR-529 ...
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When rational sections become cyclic — Gauge enhancement in F-theory via Mordell-Weil torsion
Journal of High Energy Physics, 2018 We explore novel gauge enhancements from abelian to non-simply-connected gauge groups in F-theory. To this end we consider complex structure deformations of elliptic fibrations with a Mordell-Weil group of rank one and identify the conditions under which
Florent Baume +3 more
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