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Hierarchies from fluxes in string compactifications

TLDR
In this article, the authors show that the hierarchy of scales can be fixed by a choice of Ramond-Ramond and Neveu-Schwarz fluxes in the compact manifold, and give examples involving orientifold compactifications of type IIB string theory and F-theory compactifications on Calabi-Yau fourfolds.
Abstract
Warped compactifications with significant warping provide one of the few known mechanisms for naturally generating large hierarchies of physical scales. We demonstrate that this mechanism is realizable in string theory, and give examples involving orientifold compactifications of type-IIB string theory and F-theory compactifications on Calabi-Yau fourfolds. In each case, the hierarchy of scales is fixed by a choice of Ramond-Ramond and Neveu-Schwarz fluxes in the compact manifold. Our solutions involve compactifications of the Klebanov-Strassler gravity dual to a confining $\mathcal{N}=1$ supersymmetric gauge theory, and the hierarchy reflects the small scale of chiral symmetry breaking in the dual gauge theory.

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Branes on generalized calibrated submanifolds

TL;DR: In this paper, it was shown that supersymmetric D-branes in compactifications with field strength fluxes, and on SU(3)-structure spaces, wrap generalized calibrated submanifolds, defined by simple conditions in terms of the underlying globally defined 2-and 3-forms.
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Non-perturbative superpotentials in F-theory and string duality

TL;DR: In this article, open-closed string duality between F-theory on K3 and type II strings on CY manifolds without branes was used to study nonperturbative superpotentials in generalized flux compactifications.
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High energy QCD scattering, the shape of gravity on an IR brane, and the Froissart bound

TL;DR: In this paper, high-energy scattering in nonconformal gauge theories is investigated using the dual string-gravity theory, and it is argued that strong-gravity processes such as black hole formation play an important role in the dual dynamics.
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A 119-125 GeV Higgs from a string derived slice of the CMSSM

TL;DR: In this paper, a string-derived Higgs detection scheme was proposed, in which the first condition is automatic and the second arises as a consequence of imposing radiative EW symmetry breaking and viable neutralino dark matter in agreement with WMAP constraints.
Journal ArticleDOI

NR/HEP: Roadmap for the future

TL;DR: In this paper, the authors present a concise and comprehensive overview of the state-of-the-art and important open problems in the field(s), along with a roadmap for the next years.
References
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Journal ArticleDOI

The Large N limit of superconformal field theories and supergravity

TL;DR: In this article, it was shown that the large-N limits of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravityon the product of anti-de Sitter spacetimes, spheres, and other compact manifolds.
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Large Mass Hierarchy from a Small Extra Dimension

TL;DR: In this paper, the weak scale is generated from the Planck scale through an exponential hierarchy, but this exponential arises not from gauge interactions but from the background metric, which is a slice of spacetime.
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An Alternative to compactification

TL;DR: In this paper, a single 3-brane embedded in five dimensions was shown to reproduce four-dimensional Newtonian and general relativistic gravity to more than adequate precision, even without a gap in the Kaluza-Klein spectrum.
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Supergravity and a confining gauge theory: duality cascades and χSB-resolution of naked singularities

TL;DR: In this article, a non-singular pure-supergravity background dual to the field theory on all scales, with small curvature everywhere if the ‘t Hooft coupling gsM is large, was proposed.
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Superconformal field theory on threebranes at a Calabi-Yau singularity

TL;DR: In this paper, it was shown that string theory on AdS5 × X5 can be described by a certain N = 1 supersymmetric gauge theory, which we describe in detail.
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