English
Related papers

Related papers: K\"ahler moduli stabilization in semi-realistic ma…

200 papers

A scenario for stabilization of axionic moduli fields in the context of type IIB Calabi-Yau flux compactifications is discussed in detail. We consider the case of a Calabi-Yau orientifold with h^{1,1}_- \neq 0 which allows for the presence…

High Energy Physics - Theory · Physics 2009-01-27 Kiril Hristov

There are two known sources of nonperturbative superpotentials for K\"ahler moduli in type IIB orientifolds, or F-theory compactifications on Calabi-Yau fourfolds, with flux: Euclidean brane instantons and low-energy dynamics in D7 brane…

High Energy Physics - Theory · Physics 2009-11-10 Lars Goerlich , Shamit Kachru , Prasanta K. Tripathy , Sandip P. Trivedi

Four stacks of intersecting supersymmetric fractional D6-branes on the Z_6' orientifold have previously been used to construct consistent models having the spectrum of the supersymmetric Standard Model, including a single pair of Higgs…

High Energy Physics - Theory · Physics 2015-05-27 David Bailin , Alex Love

We analyze string-theoretic large-field inflation in the regime of spontaneously-broken supergravity with conventional moduli stabilization by fluxes and non-perturbative effects. The main ingredient is a shift-symmetric Kahler potential,…

High Energy Physics - Theory · Physics 2014-08-26 Arthur Hebecker , Sebastian C. Kraus , Lukas T. Witkowski

We address the open question of performing an explicit stabilisation of all closed string moduli (including dilaton, complex structure and Kaehler moduli) in fluxed type IIB Calabi-Yau compactifications with chiral matter. Using toric…

High Energy Physics - Theory · Physics 2015-06-18 Michele Cicoli , Denis Klevers , Sven Krippendorf , Christoph Mayrhofer , Fernando Quevedo , Roberto Valandro

Problems of stabilizing moduli of the type--IIB string theory on toroidal orientifolds $\T^6/\Z_2$, in presence of worldvolume fluxes on various D-branes, are considered. For $Z_2$ actions, introducing either O9 or O3 planes, we rule out…

High Energy Physics - Theory · Physics 2009-11-18 Alok Kumar , Subir Mukhopadhyay , Koushik Ray

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…

High Energy Physics - Theory · Physics 2009-11-10 J. F. G. Cascales , M. P. Garcia del Moral , F. Quevedo , A. Uranga

We revisit the two-stage procedure for moduli stabilization in Type IIB orientifolds at light K\"ahler-modulus limit. In view of the necessity to keep the K\"ahler geometry structure of the moduli space during the stabilization, we define a…

High Energy Physics - Theory · Physics 2007-05-23 Huan-Xiong Yang

We discuss the moduli stabilization arising in the presence of gauge fluxes, R-symmetry twists and non-perturbative effects in the context of 6-dimensional supergravity models. We show how the presence of D-terms, due to the gauge fluxes,…

High Energy Physics - Theory · Physics 2007-10-26 A. P. Braun , A. Hebecker , M. Trapletti

We discuss general properties of moduli stablization in KKLT scenarios in type IIB orientifold compactifications. In particular, we find conditions for the Kaehler potential to allow a KKLT scenario for a manifold X_6 without complex…

High Energy Physics - Theory · Physics 2008-11-26 D. Lust , S. Reffert , E. Scheidegger , W. Schulgin , S. Stieberger

We show that the dilaton and T-moduli can be stabilized by a single gaugino condensation mechanism in the four-dimensional effective field theory derived from Type IIB orientifolds. A crucial role is played by the mixing of the blowing-up…

High Energy Physics - Theory · Physics 2009-10-31 S. A. Abel , G. Servant

In this note, we review our construction of de Sitter vacua in type IIB flux compactifications, in which moduli stabilization and D-term uplifting can be combined consistently with the supergravity constraints. Here, the closed string…

High Energy Physics - Theory · Physics 2008-11-26 Susha L. Parameswaran , Alexander Westphal

In the context of type IIB string theory we combine moduli stabilisation and model building on branes at del Pezzo singularities in a fully consistent global compactification. By means of toric geometry, we classify all the CY manifolds…

High Energy Physics - Theory · Physics 2015-06-05 Michele Cicoli , Sven Krippendorf , Christoph Mayrhofer , Fernando Quevedo , Roberto Valandro

We study KKLT type models with moduli-mixing superpotential. In several string models, gauge kinetic functions are written as linear combinations of two or more moduli fields. Their gluino condensation generates moduli-mixing…

High Energy Physics - Theory · Physics 2010-12-03 Hiroyuki Abe , Tetsutaro Higaki , Tatsuo Kobayashi

We present a new way to construct de Sitter vacua in type IIB flux compactifications, in which moduli stabilization and D-term uplifting can be combined in a manner consistent with the supergravity constraints. Here, the closed string…

High Energy Physics - Theory · Physics 2008-11-26 Susha L. Parameswaran , Alexander Westphal

Intersecting D-brane model building often suffer from the unstabilized open-string moduli, leading to the unwanted massless adjoint scalars. In our previous work arXiv:2505.03664, this issue was resolved by employing the rigid D6-branes on…

High Energy Physics - Theory · Physics 2026-05-13 Adeel Mansha , Mudassar Sabir , Tianjun Li , Luyang Wang

We study the effect of RR and NSNS 3-form fluxes on the effective action of the worldvolume fields of Type IIB D7/D3-brane configurations. The D7-branes wrap 4-cycles on a local Calabi-Yau geometry. This is an extension of previous work on…

High Energy Physics - Theory · Physics 2008-11-26 P. G. Camara , L. E. Ibanez , A. M. Uranga

We discuss flux quantization and moduli stabilization in toroidal type IIB Z_N - or Z_N x Z_M -orientifolds, focusing mainly on their orbifold limits. After presenting a detailed discussion of their moduli spaces and effective actions, we…

High Energy Physics - Theory · Physics 2008-11-26 D. Lust , S. Reffert , W. Schulgin , S. Stieberger

We study novel type IIB compactifications on the T^6/Z_2 orientifold. This geometry arises in the T-dual description of Type I theory on T^6, and one normally introduces 16 space-filling D3-branes to cancel the RR tadpoles. Here, we cancel…

High Energy Physics - Theory · Physics 2009-11-07 Shamit Kachru , Michael Schulz , Sandip Trivedi

We revisit moduli stabilisation for type IIB flux compactifications that include a warped throat region corresponding to a warped deformed conifold, with an anti-D3-brane sitting at its tip. The warping induces a coupling between the…

High Energy Physics - Theory · Physics 2021-06-11 Bruno Valeixo Bento , Dibya Chakraborty , Susha L. Parameswaran , Ivonne Zavala