Realistic D-brane models on warped throats: Fluxes, hierarchies and moduli stabilization

By J. Cascales, M. P. G. D. Moral, A. Uranga, F. Quevedo. 2003

149 citations recorded by the source corpus.

We describe the construction of string theory models with semirealistic spectrum in a sector of (anti) D3-branes located at an orbifold singularity at the bottom of a highly warped throat geometry, which is a generalisation of the Klebanov-Strassler deformed conifold. These models realise the Randall-Sundrum proposal to naturally generate the Planck/electroweak hierarchy in a concrete string theory embedding, and yielding interesting chiral open string spectra. We describe examples with standard model gauge group (or left-right symmetric extensions) and three families of SM fermions, with correct quantum numbers including hypercharge. The dilaton and complex structure moduli of the geometry are stabilised by the 3-form fluxes required to build the throat. We describe diverse issues concerning the stabilisation of geometric Kahler moduli, like blow-up modes of the orbifold singularities, via D term potentials and gauge theory non-perturbative effects, like gaugino condensation. This local geometry, once embedded in a full compactification, could give rise to models with all moduli stabilised, and with the potential to lead to de Sitter vacua. Issues of gauge unification, proton stability, supersymmetry breaking and Yukawa couplings are also discussed.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/99474fd9826e540531d0767cb4254ed496c8dcab

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In Nuclear and High Energy Physics

Citations in the corpus

Kinetic Mixing of the Photon with Hidden U(1)s in String Phenomenology (2008, methodology): “Moreover, we must consider how to embed the standard model on branes: we may have either D3-branes at the singularity [93] (where we must generalise the above, with for example an orbifold projection) or D3/D7 branes wrapping appropriate cycles elsewhere, either in the throat or the bulk, with D3-br”
Racetrack Inflation (2004, result): “For instance, in realistic generalizations of the KKLT scenario including standard model branes [45], the throat where the standard model lives should be significantly warped, whereas brane/antibrane inflation required a mild warping in the inflation throat in order to be consistent with the COBE no”
Chiral D-brane Models with Frozen Open String Moduli (2005, background): “Indeed, similarly to [102,104] one could argue that the open string chiral fields participate in a D-term potential where the twisted and untwisted Kähler moduli are also involved.”
Cosmic F- and D-strings (2003, background): “[33] gives constructions of the Standard Model in terms of local configurations with these ingredients.”
On Inflation in String Theory (2003, background): “New ideas of particle phenomenology in the context of supergravity and moduli stabilization were developed in [45, 46, 47, 48, 49, 3, 50, 51, 52], leading to a set of new predictions for the spectrum of particles to be detected in the future.”
TOWARD REALISTIC INTERSECTING D-BRANE MODELS (2005, background): “7 Local models of flux compactification with realistic particle physics features have been considered in [157].”
Flux compactifications in string theory: A Comprehensive review (2005, background): “Neither do we discuss twisted moduli, and their stabilization mechanisms [23, 38, 39].”
Large-volume flux compactifications: Moduli spectrum and D3/D7 soft supersymmetry breaking (2005, background): “It would be interesting to explicitly combine our results with realistic models such as in [55, 56, 57, 58, 59] and to explore further the phenomenology of the different scenarios defined by the value of the string scale.”