Mixmaster universe in Horava-Lifshitz gravity (2009)
Bakas, Ioannis, Bourliot, Francois, Lust, Dieter, Petropoulos, Marios
We consider spatially homogeneous (but generally non-isotropic) cosmologies in the recently proposed Horava-Lifshitz gravity and compare them to those of general relativity using Hamiltonian methods....
String Phenomenology at the LHC (2009)
Anchordoqui, Luis A., Goldberg, Haim, Lust, Dieter, Stieberger, Stephan, Taylor, Tomasz R.
We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching...
New supersymmetric AdS4 type II vacua (2009)
Lust, Dieter, Tsimpis, Dimitrios
Building on our recent results on dynamic SU(3)xSU(3) structures we present a set of sufficient conditions for supersymmetric AdS4xM6 backgrounds of type IIA/IIB supergravity. These conditions ensure...
Domain walls from ten dimensions (2009)
Haack, Michael, Lust, Dieter, Martucci, Luca, Tomasiello, Alessandro
We write down the general conditions for N=1 supersymmetric four-dimensional domain walls, deriving them from a ten-dimensional point of view using generalized complex geometry. In cases where the...
In this article we will overview several aspects of the string landscape, namely intersecting D-brane models and their statistics, possible model independent LHC signatures of intersecting brane...
LHC Phenomenology for String Hunters (2009)
Anchordoqui, Luis A., Goldberg, Haim, Lust, Dieter, Nawata, Satoshi, Stieberger, Stephan, Taylor, Tomasz R.
We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching...
Classes of AdS4 type IIA/IIB compactifications with SU(3)xSU(3) structure (2009)
Lust, Dieter, Tsimpis, Dimitrios
We introduce an ansatz which allows us to solve the supersymmetry equations for warped N=1 AdS4 type II supergravity compactifications of general SU(3)xSU(3) structure. As a byproduct we obtain a set...
The effective theory of type IIA AdS4 compactifications on nilmanifolds and cosets (2009)
Caviezel, Claudio, Koerber, Paul, Kors, Simon, Lust, Dieter, Tsimpis, Dimitrios, Zagermann, Marco
We consider string theory compactifications of the form AdS4 x M6 with orientifold six-planes, where M6 is a six-dimensional compact space that is either a nilmanifold or a coset. For all known...
Update of D3/D7-Brane Inflation on K3 x T^2/Z_2 (2009)
Haack, Michael, Kallosh, Renata, Krause, Axel, Linde, Andrei, Lust, Dieter, Zagermann, Marco
We update the D3/D7-brane inflation model on K3 x T^2/Z_2 with branes and fluxes. For this purpose, we study the low energy theory including g_s corrections to the gaugino condensate superpotential...
The LHC String Hunter's Companion (2009)
Lust, Dieter, Stieberger, Stephan, Taylor, Tomasz R.
The mass scale of fundamental strings can be as low as few TeV/c^2 provided that spacetime extends into large extra dimensions. We discuss the phenomenological aspects of weakly coupled low mass...
On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds (2008)
Caviezel, Claudio, Koerber, Paul, Kors, Simon, Lust, Dieter, Wrase, Timm, Zagermann, Marco
We study cosmological properties of type IIA compactifications on orientifolds of SU(3)-structure manifolds with non-vanishing geometric flux. These compactifications give rise to effective 4D N=1...
Dijet signals for low mass strings at the LHC (2008)
Anchordoqui, Luis A, Goldberg, Haim, Lust, Dieter, Nawata, Satoshi, Stieberger, Stephan, Taylor, Tomasz R.
We consider extensions of the standard model based on open strings ending on D-branes, with gauge bosons due to strings attached to stacks of D-branes and chiral matter due to strings stretching...
Generalized non-supersymmetric flux vacua (2008)
Lust, Dieter, Marchesano, Fernando, Martucci, Luca, Tsimpis, Dimitrios
We discuss a novel strategy to construct 4D N=0 stable flux vacua of type II string theory, based on the existence of BPS bounds for probe D-branes in some of these backgrounds. In particular, we...
The LHC String Hunter's Companion (2008)
Lust, Dieter, Stieberger, Stephan, Taylor, Tomasz R.
The mass scale of fundamental strings can be as low as few TeV/c^2 provided that spacetime extends into large extra dimensions. We discuss the phenomenological aspects of weakly coupled low mass...
The effective theory of type IIA AdS4 compactifications on nilmanifolds and cosets (2008)
Caviezel, Claudio, Koerber, Paul, Kors, Simon, Lust, Dieter, Tsimpis, Dimitrios, Zagermann, Marco
We consider string theory compactifications of the form AdS4 x M6 with orientifold six-planes, where M6 is a six-dimensional compact space that is either a nilmanifold or a coset. For all known...
Comments on Orientifolds without Vector Structure (2008)
Bachas, Constantin, Bianchi, Massimo, Blumenhagen, Ralph, Lust, Dieter, Weigand, Timo
We revisit type I compactifications with a Spin(32)/Z2 gauge bundle that admits no vector structure. We elucidate the relation of this Z2 obstruction to discrete B-field flux and to 't Hooft flux and...
Fayet-Iliopoulos Terms in AdS/CFT with Flavour (2008)
Ammon, Martin, Erdmenger, Johanna, Höhne, Stephan, Lust, Dieter, Meyer, Rene
We construct the gravity dual of a field theory with flavour in which there are Fayet-Iliopoulos (FI) terms present. For this purpose we turn on a constant Kalb-Ramond B field in four internal space...
Update of D3/D7-Brane Inflation on K3 x T^2/Z_2 (2008)
Haack, Michael, Kallosh, Renata, Krause, Axel, Linde, Andrei, Lust, Dieter, Zagermann, Marco
We update the D3/D7-brane inflation model on K3 x T^2/Z_2 with branes and fluxes. For this purpose, we study the low energy theory including g_s corrections to the gaugino condensate superpotential...
Type IIA AdS4 compactifications on cosets, interpolations and domain walls (2008)
Koerber, Paul, Lust, Dieter, Tsimpis, Dimitrios
We present a classification of a large class of type IIA N=1 supersymmetric compactifications to AdS4, based on left-invariant SU(3)-structures on coset spaces. In the absence of sources the...
Power of Black Hole Physics: Seeing through the Vacuum Landscape (2008)
In this paper we generalize the black hole bound of arXiv:0706.2050 to de Sitter spaces, and apply it to various vacua in the landscape, with a special emphasis on slow-roll inflationary vacua....
Non-perturbative Yukawa Couplings from String Instantons (2008)
Blumenhagen, Ralph, Cvetic, Mirjam, Lust, Dieter, Richter, Robert, Weigand, Timo
Non-perturbative D-brane instantons can generate perturbatively absent though phenomenologically relevant couplings for Type II orientifold compactifications with D-branes. We discuss the generation...
D-brane Instantons in 4D Supersymmetric String Vacua (2008)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
We review some aspects of D-instantons in intersecting D-brane models. In particular, we present applications of the recently proposed instanton calculus to computations of charged matter...
Fayet-Iliopoulos Terms in AdS/CFT with Flavour (2008)
Ammon, Martin, Erdmenger, Johanna, Höhne, Stephan, Lust, Dieter, Meyer, Rene
We construct the gravity dual of a field theory with flavour in which there are Fayet-Iliopoulos (FI) terms present. For this purpose we turn on a constant Kalb-Ramond B field in four internal space...
Type IIA AdS4 compactifications on cosets, interpolations and domain walls (2008)
Koerber, Paul, Lust, Dieter, Tsimpis, Dimitrios
We present a classification of a large class of type IIA N=1 supersymmetric compactifications to AdS4, based on left-invariant SU(3)-structures on coset spaces. In the absence of sources the...
D-brane Instantons in 4D Supersymmetric String Vacua (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
We review some aspects of D-instantons in intersecting D-brane models. In particular, we present applications of the recently proposed instanton calculus to computations of charged matter...
Non-Perturbative Monodromies In (2007)
Heterotic String, Non-perturbative Monodromies, In N Heterotic, Gabriel Lopes Cardoso, Dieter Lust, Thomas Mohaupt
We address non-perturbative effects and duality symmetries in N = 2 heterotic string theories in four dimensions. Specifically, we consider how each of the four lines of enhanced gauge symmetries in...
Gabriel Lopes Cardoso, Dieter Lust, Thomas Mohaupt
z We discuss recent results on orbifold compactifications including all untwisted moduli, emphasizing the local complex Kahler structure of the moduli space. 1
String Landscape and the Standard Model of Particle Physics (2007)
In this paper we describe ideas about the string landscape, and how to relate it to the physics of the Standard Model of particle physics. First, we give a short status report about heterotic string...
Non-perturbative Yukawa Couplings from String Instantons (2007)
Blumenhagen, Ralph, Cvetic, Mirjam, Lust, Dieter, Richter, Robert, Weigand, Timo
Non-perturbative D-brane instantons can generate perturbatively absent though phenomenologically relevant couplings for Type II orientifold compactifications with D-branes. We discuss the generation...
Instantons and Holomorphic Couplings in Intersecting D-brane Models (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
We clarify certain aspects and discuss extensions of the recently introduced string D-instanton calculus (hep-th/0609191). The one-loop determinants are related to one-loop open string threshold...
Thresholds for Intersecting D-branes Revisited (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
Gauge threshold corrections for intersecting D6-brane string models on toroidal orbifold backgrounds are reconsidered. Both by dimensionally regularising the appearing open string one-loop diagrams...
Statistics of intersecting D-brane models on T^6/Z_6 (2007)
Gmeiner, Florian, Lust, Dieter, Stein, Maren
We perform a statistical analysis of supersymmetric intersecting D-brane models on the type II orientifold T^6/Z_6. After providing an analytic proof of the finiteness of the number of possible...
Adding D7-branes to the Polchinski-Strassler gravity background (2007)
Apreda, Riccardo, Erdmenger, Johanna, Lust, Dieter, Sieg, Christoph
We motivate and summarize our analysis of hep-th/0610276 in which we consider D7-brane probe embeddings in the Polchinski-Strassler background with N=2 supersymmetry. The corresponding dual gauge...
Gaugino Condensates and D-terms from D7-branes (2007)
Haack, Michael, Krefl, Daniel, Lust, Dieter, Proeyen, Antoine Van, Zagermann, Marco
We investigate, at the microscopic level, the compatibility between D-term potentials from world-volume fluxes on D7-branes and non-perturbative superpotentials arising from gaugino condensation on a...
Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes (2007)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter, Stieberger, Stephan
This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with D-branes and fluxes. The main concern is to provide all...
Non-perturbative SQCD Superpotentials from String Instantons (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Plauschinn, Erik, Schmidt-Sommerfeld, Maximilian
The Affleck-Dine-Seiberg instanton generated superpotential for SQCD with Nf=Nc-1 flavours is explicitly derived from a local model of engineered intersecting D6-branes with a single E2-instanton....
Adding flavour to the Polchinski-Strassler background (2007)
Apreda, Riccardo, Erdmenger, Johanna, Lust, Dieter, Sieg, Christoph
As an extension of holography with flavour, we analyze in detail the embedding of a D7-brane probe into the Polchinski-Strassler gravity background, in which the breaking of conformal symmetry is...
Adding D7-branes to the Polchinski-Strassler gravity background (2007)
Apreda, Riccardo, Erdmenger, Johanna, Lust, Dieter, Sieg, Christoph
We motivate and summarize our analysis of hep-th/0610276 in which we consider D7-brane probe embeddings in the Polchinski-Strassler background with N=2 supersymmetry. The corresponding dual gauge...
Thresholds for Intersecting D-branes Revisited (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
Gauge threshold corrections for intersecting D6-brane string models on toroidal orbifold backgrounds are reconsidered. Both by dimensionally regularising the appearing open string one-loop diagrams...
Instantons and Holomorphic Couplings in Intersecting D-brane Models (2007)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Schmidt-Sommerfeld, Maximilian
We clarify certain aspects and discuss extensions of the recently introduced string D-instanton calculus (href{/abs/hep-th/0609191}{hep-th/0609191}). The one-loop determinants are related to one-loop...
Statistics of intersecting D-brane models on T^6/Z_6 (2007)
Gmeiner, Florian, Lust, Dieter, Stein, Maren
We perform a statistical analysis of supersymmetric intersecting D-brane models on the type II orientifold T^6/Z_6. After providing an analytic proof of the finiteness of the number of possible...
Non-perturbative SQCD Superpotentials from String Instantons (2006)
Akerblom, Nikolas, Blumenhagen, Ralph, Lust, Dieter, Plauschinn, Erik, Schmidt-Sommerfeld, Maximilian
The Affleck-Dine-Seiberg instanton generated superpotential for SQCD with Nf=Nc-1 flavours is explicitly derived from a local model of engineered intersecting D6-branes with a single E2-instanton....
Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes (2006)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter, Stieberger, Stephan
This review article provides a pedagogical introduction into various classes of chiral string compactifications to four dimensions with D-branes and fluxes. The main concern is to provide all...
Adding flavour to the Polchinski-Strassler background (2006)
Apreda, Riccardo, Erdmenger, Johanna, Lust, Dieter, Sieg, Christoph
As an extension of holography with flavour, we analyze in detail the embedding of a D7-brane probe into the Polchinski-Strassler gravity background, in which the breaking of conformal symmetry is...
Gaugino Condensates and D-terms from D7-branes (2006)
Haack, Michael, Krefl, Daniel, Lust, Dieter, Van Proeyen, Antoine, Zagermann, Marco
We investigate, at the microscopic level, the compatibility between D-term potentials from world-volume fluxes on D7-branes and non-perturbative superpotentials arising from gaugino condensation on a...
Extremal non-BPS black holes and entropy extremization (2006)
Cardoso, Gabriel Lopes, Grass, Viviane, Lust, Dieter, Perz, Jan
At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature...
Entropy Maximization in the Presence of Higher-Curvature Interactions (2006)
Cardoso, Gabriel Lopes, Lust, Dieter, Perz, Jan
Within the context of the entropic principle, we consider the entropy of supersymmetric black holes in N=2 supergravity theories in four dimensions with higher-curvature interactions, and we discuss...
On supersymmetric Minkowski vacua in IIB orientifolds (2006)
Supersymmetric Minkowski vacua in IIB orientifold compactifications based on orbifolds with background fluxes and non-perturbative superpotentials are investigated. Especially, microscopic...
One in a Billion: MSSM-like D-Brane Statistics (2006)
Gmeiner, Florian, Blumenhagen, Ralph, Honecker, Gabriele, Lust, Dieter, Weigand, Timo
Continuing our recent work href{/abs/hep-th/0411173}{hep-th/0411173}, we study the statistics of four-dimensional, supersymmetric intersecting D-brane models in a toroidal orientifold background. We...
Fermion Zero Modes in the Presence of Fluxes and a Non-perturbative Superpotential (2006)
Lust, Dieter, Reffert, Susanne, Schulgin, Waldemar, Tripathy, Prasanta
We study the effect of background fluxes of general Hodge type on the supersymmetry conditions and on the fermionic zero modes on the world-volume of a Euclidean M5/D3-brane in M-theory/type IIB...
Moduli Stabilization in the Heterotic/IIB Discretuum (2006)
Curio, Gottfried, Krause, Axel, Lust, Dieter
We consider supersymmetric compactifications of type IIB and the weakly coupled heterotic string with G resp.H-flux and gaugino condensation in a hidden sector included. We point out that proper...
Entropy Maximization in the Presence of Higher-Curvature Interactions (2006)
Cardoso, Gabriel Lopes, Lust, Dieter, Perz, Jan
Within the context of the entropic principle, we consider the entropy of supersymmetric black holes in N=2 supergravity theories in four dimensions with higher-curvature interactions, and we discuss...
Extremal non-BPS black holes and entropy extremization (2006)
Cardoso, Gabriel Lopes, Grass, Viviane, Lust, Dieter, Perz, Jan
At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature...
On supersymmetric Minkowski vacua in IIB orientifolds (2006)
Supersymmetric Minkowski vacua in IIB orientifold compactifications based on orbifolds with background fluxes and non-perturbative superpotentials are investigated. Especially, microscopic...
One in a Billion: MSSM-like D-Brane Statistics (2005)
Gmeiner, Florian, Blumenhagen, Ralph, Honecker, Gabriele, Lust, Dieter, Weigand, Timo
Continuing our recent work hep-th/0411173, we study the statistics of four-dimensional, supersymmetric intersecting D-brane models in a toroidal orientifold background. We have performed a vast...
Fermion Zero Modes in the Presence of Fluxes and a Non-perturbative Superpotential (2005)
Lust, Dieter, Reffert, Susanne, Schulgin, Waldemar, Tripathy, Prasanta
We study the effect of background fluxes of general Hodge type on the supersymmetry conditions and on the fermionic zero modes on the world-volume of a Euclidean M5/D3-brane in M-theory/type IIB...
N=1,2 supersymmetric vacua of IIA supergravity and SU(2) structures (2005)
Bovy, Jo, Lust, Dieter, Tsimpis, Dimitrios
We consider backgrounds of (massive) IIA supergravity of the form of a warped product $M_{1,3}\times_{\omega} X_6$, where $X_6$ is a six-dimensional compact manifold and $M_{1,3}$ is $AdS_4$ or a...
Moduli Stabilization in the Heterotic/IIB Discretuum (2005)
Curio, Gottfried, Krause, Axel, Lust, Dieter
We consider supersymmetric compactifications of type IIB and the weakly coupled heterotic string with G resp.H-flux and gaugino condensation in a hidden sector included. We point out that proper...
The Statistics of Supersymmetric D-brane Models (2005)
Blumenhagen,Ralph, Gmeiner,Florian, Honecker,Gabriele, Lust,Dieter, Weigand,Timo
We investigate the statistics of the phenomenologically important D-brane sector of string compactifications. In particular for the class of intersecting D-brane models, we generalise methods known...
The Statistics of Supersymmetric D-brane Models (2005)
Blumenhagen, Ralph, Gmeiner, Florian, Honecker, Gabriele, Lust, Dieter, Weigand, Timo
We investigate the statistics of the phenomenologically important D-brane sector of string compactifications. In particular for the class of intersecting D-brane models, we generalise methods known...
N=1,2 supersymmetric vacua of IIA supergravity and SU(2) structures (2005)
Bovy, Jo, Lust, Dieter, Tsimpis, Dimitrios
We consider backgrounds of (massive) IIA supergravity of the form of a warped product $M_{1,3}\times_{\omega} X_6$, where $X_6$ is a six-dimensional compact manifold and $M_{1,3}$ is $AdS_4$ or a...
The Statistics of Supersymmetric D-brane Models (2004)
Blumenhagen, Ralph, Gmeiner, Florian, Honecker, Gabriele, Lust, Dieter, Weigand, Timo
We investigate the statistics of the phenomenologically important D-brane sector of string compactifications. In particular for the class of intersecting D-brane models, we generalise methods known...
Intersecting Brane Worlds -- A Path to the Standard Model ? (2004)
In this review we describe the general geometrical framework of brane world constructions in orientifolds of type IIA string theory with D6-branes wrapping 3-cycles in a Calabi-Yau 3-fold. These...
Gauge Unification in Supersymmetric Intersecting Brane Worlds (2003)
Blumenhagen, Ralph, Lust, Dieter, Stieberger, Stephan
We show that contrary to first expectations realistic three generation supersymmetric intersecting brane world models give rise to phenomenologically interesting predictions about gauge coupling...
Moduli Stabilization in Chiral Type IIB Orientifold Models with Fluxes (2003)
Blumenhagen, Ralph, Lust, Dieter, Taylor, Tomasz R.
We consider Type IIB orientifold models on Calabi-Yau spaces with three-form G-flux turned on. These fluxes freeze some of the complex structure moduli and the complex dilaton via an F-term scalar...
The Standard Model on the Quintic (2002)
Blumenhagen, Ralph, Braun, Volker, Kors, Boris, Lust, Dieter
We describe the general geometrical framework of brane world constructions in orientifolds of type IIA string theory with D6-branes wrapping 3-cycles in a Calabi-Yau 3-fold, and point out their...
The holographic RG flow in a field theory on a curved background (2002)
Cardoso, Gabriel Lopes, Lust, Dieter
As shown by Freedman, Gubser, Pilch and Warner, the RG flow in ${\cal N}=4$ super-Yang-Mills theory broken to an ${\cal N}=1$ theory by the addition of a mass term can be described in terms of a...
Orientifolds of K3 and Calabi-Yau Manifolds with Intersecting D-branes (2002)
Blumenhagen, Ralph, Braun, Volker, Kors, Boris, Lust, Dieter
We investigate orientifolds of type II string theory on K3 and Calabi-Yau 3-folds with intersecting D-branes wrapping special Lagrangian cycles. We determine quite generically the chiral massless...
Hybrid Inflation in Intersecting Brane Worlds (2002)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter, Ott, Tassilo
Non-supersymmetric brane world scenarios in string theory display perturbative instabilities that usually involve run-away potentials for scalar moduli fields. We investigate in the framework of...
Moduli Stabilization for Intersecting Brane Worlds in Type 0' String Theory (2002)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter
Starting from the non-supersymmetric, tachyon-free orientifold of type 0 string theory, we construct four-dimensional brane world models with D6-branes intersecting at angles on internal tori. They...
Curved BPS domain walls and RG flow in five dimensions (2002)
Cardoso, Gabriel Lopes, Dall'Agata, Gianguido, Lust, Dieter
We determine, in the context of five-dimensional ${\cal N}=2$ gauged supergravity with vector and hypermultiplets, the conditions under which curved (non Ricci flat) supersymmetric domain wall...
Intersecting Brane Worlds on Tori and Orbifolds (2001)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter, Ott, Tassilo
We review the construction and phenomenology of intersecting brane worlds. The breaking of chiral and supersymmetry together with a reduction of gauge symmetry by introducing D-branes at generic...
Fluxes and Branes in Type II Vacua and M-theory Geometry with G(2) and Spin(7) Holonomy (2001)
Curio, Gottfried, Kors, Boris, Lust, Dieter
We discuss fluxes of RR and NSNS background fields in type II string compactifications on non-compact Calabi-Yau threefolds together with their dual brane description which involves bound states of...
The Standard Model from Stable Intersecting Brane World Orbifolds (2001)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter, Ott, Tassilo
We analyze the perturbative stability of non-supersymmetric intersecting brane world models on tori. Besides the dilaton tadpole, a dynamical instability in the complex structure moduli space occurs...
Fluxes in Heterotic and Type II String Compactifications (2001)
Curio, Gottfried, Klemm, Albrecht, Kors, Boris, Lust, Dieter
In this paper we consider heterotic compactifications on K3 x T2 as well as type II compactifications on K3-fibred Calabi-Yau spaces with certain fluxes for the gauge and RR field strengths F and H...
Curved BPS domain wall solutions in five-dimensional gauged supergravity (2001)
Cardoso, Gabriel Lopes, Dall'Agata, Gianguido, Lust, Dieter
We analyze the possibility of constructing supersymmetric curved domain wall solutions in five-dimensional ${\cal N}=2$ gauged supergravity, which are supported by non-constant scalar fields...
Non-commutative D- and M-brane Bound States (2001)
Kors, Boris, Lust, Dieter, Miemiec, Andre
We analyze certain brane bound states in M-theory and their descendants in type IIA string theory, all involving 3-form or 2-form background fluxes. Among them are configurations which represent...
Curved BPS domain wall solutions in four-dimensional N=2 supergravity (2001)
Behrndt, Klaus, Cardoso, Gabriel Lopes, Lust, Dieter
We construct four-dimensional domain wall solutions of N=2 gauged supergravity coupled to vector and to hypermultiplets. The gauged supergravity theories that we consider are obtained by performing...
Type I Strings with F- and B-Flux (2000)
Blumenhagen, Ralph, Kors, Boris, Lust, Dieter
We present non-supersymmetric toroidal compactifications of type I string theory with both constant background NSNS two-form flux and non-trivial magnetic flux on the various D9-branes. The...
Magnetic Flux in Toroidal Type I Compactification (2000)
Blumenhagen, Ralph, Goerlich, Lars, Kors, Boris, Lust, Dieter
We discuss the compactification of type I strings on a torus with additional background gauge flux on the D9-branes. The solutions to the cancellation of the RR tadpoles display various...
Noncommutative Compactifications of Type I Strings on Tori with Magnetic Background Flux (2000)
Blumenhagen, Ralph, Goerlich, Lars, Kors, Boris, Lust, Dieter
We construct six- and four-dimensional toroidal compactifications of the Type I string with magnetic flux on the D-branes. The open strings in this background probe a noncommutative internal...
Local Anomaly Cancellation, M-Theory Orbifolds and Phase-Transitions (2000)
Faux, Michael, Lust, Dieter, Ovrut, Burt A.
In this paper we consider orbifold compactifications of M-theory on $S^1/{\bf Z}_2\times T^4/{\bf Z}_2$. We discuss solutions of the local anomaly matching conditions by twisted vector, tensor and...
Asymmetric Orbifolds, Noncommutative Geometry and Type I String Vacua (2000)
Blumenhagen, Ralph, Goerlich, Lars, Kors, Boris, Lust, Dieter
We investigate the D-brane contents of asymmetric orbifolds. Using T-duality we find that the consistent description of open strings in asymmetric orbifolds requires to turn on background gauge...
BPS Amplitudes, Helicity Supertraces and Membranes in M-Theory (1999)
We study BPS dominated loop amplitudes in M-theory on T^2. For this purpose we generalize the concept of helicity supertraces to nine spacetime dimensions. These traces distinguish between various...
Continuous Gauge and Supersymmetry Breaking for Open Strings on D-branes (1999)
Blumenhagen, Ralph, Kounnas, Costas, Lust, Dieter
We consider freely acting orbifold compactifications, which interpolate in two possible decompactification limits between the supersymmetric type II string and the non-supersymmetric type 0 string....
Space-Time Supersymmetry, IIA/B Duality and M-Theory (1999)
Abou-Zeid, Mohab, De Wit, Bernard, Lust, Dieter, Nicolai, Hermann
The connection between IIA superstring theory compactified on a circle of radius R and IIB theory compactified on a circle of radius 1/R is reexamined from the perspective of N=2, D=9 space-time...
Non-Supersymmetric Gauge Theories from D-Branes in Type 0 String Theory (1999)
Blumenhagen, Ralph, Font, Anamaria, Lust, Dieter
We construct non-supersymmetric four dimensional gauge theories arising as effective theories of D-branes placed on various singularities in Type 0B string theory. We mostly focus on models which are...
Branes, Waves and AdS Orbifolds (1999)
The embedding of a Taub-NUT space in the directions transverse to the world volume of branes describes branes at (spherical) orbifold singularities. Similarly, the embedding of a pp-wave in the brane...
Tachyon-free Orientifolds of Type 0B Strings in Various Dimensions (1999)
Blumenhagen, Ralph, Font, Anamaria, Lust, Dieter
We construct non-tachyonic, non-supersymmetric orientifolds of Type 0B strings in ten, six and four space-time dimensions. Typically, these models have unitary gauge groups with charged massless...
Recent Developments in String Theory: From Perturbative Dualities to M-Theory (1999)
Haack, Michael, Kors, Boris, Lust, Dieter
These lectures intend to give a pedagogical introduction into some of the developments in string theory during the last years. They include perturbative T-duality and non perturbative S- and...
Mirror Symmetries for Brane Configurations and Branes at Singularities (1999)
Aganagic, Mina, Karch, Andreas, Lust, Dieter, Miemiec, Andre
We study local mirror symmetry on non-compact Calabi-Yau manifolds (conifold type of singularities) in the presence of D3 brane probes. Using an intermediate brane setup of NS 5-branes `probed' by D4...
New N=1 Superconformal Field Theories and their Supergravity Description (1999)
Karch, Andreas, Lust, Dieter, Miemiec, Andre
In this note we construct a new class of superconformal field theories as mass deformed N=4 super Yang-Mills theories. We will argue that these theories correspond to the fixed points which were...
N=1 Supersymmetric Gauge Theories and Supersymmetric 3-cycles (1998)
Karch, Andreas, Lust, Dieter, Miemiec, Andre
In this paper we discuss the strong coupling limit of chiral N=1 supersymmetric gauge theory via their embedding into M-theory. In particular we focus on the brane box models of Hanany and Zaffaroni...
Karch, Andreas, Lust, Dieter, Zoupanos, George
In this paper we discuss some aspects of the behavior of superconformal N=1 models under Seiberg's duality. Our claim is that if an electric gauge theory is superconformal on some marginal subspace...
Equivalence of Geometric Engineering and Hanany-Witten via Fractional Branes (1998)
Karch, Andreas, Lust, Dieter, Smith, Douglas J.
We present an explicit relation between the Hanany-Witten and Geometric Engineering approaches of realising gauge theories in string theory. The last piece in the puzzle is a T-duality relating...
String Vacua with N=2 Supersymmetry in Four Dimensions (1998)
In this article we review four-dimensional string vacua with N=2 space-time supersymmetry. In particular, we will discuss several aspects of the string-string duality between the heterotic string,...
Brane Dynamics and Chiral non-Chiral Transitions (1998)
Brunner, Ilka, Hanany, Amihay, Karch, Andreas, Lust, Dieter
We study brane realizations of chiral matter in N=1 supersymmetric gauge theories in four dimensions. A "cross" configuration which leads to "flavor doubling" is found to have a superpotential. The...
Higher-Order Black-Hole Solutions in N = 2 Supergravity and Calabi-Yau String Backgrounds (1998)
Klaus Behrndt, Gabriel Lopes Cardoso, Bernard De Wit, Thomas Mohaupt, Dieter Lust, Wafic A. Sabra
Based on special geometry, we consider corrections to N = 2 extremal blackhole solutions and their entropies originating from higher-order derivative terms in N = 2 supergravity. These corrections...
Dualities in all order finite N=1 gauge theories (1997)
Karch, Andreas, Lust, Dieter, Zoupanos, George
We search for dual gauge theories of all-loop finite, N = 1 supersymmetric gauge theories. It is shown how to find explicitly the dual gauge theories of almost all chiral, N = 1, all-loop finite...
N=1 Dual String Pairs and their Modular Superpotentials (1997)
We review the duality between heterotic and F--theory string vacua with N=1 space-time supersymmetry in eight, six and four dimensions. In particular, we discuss two chains of four-dimensional...
Behrndt, Klaus, Lust, Dieter, Sabra, Wafic A.
In this paper we discuss compactifications of type II superstrings where the moduli of the internal Calabi-Yau space vary over four-dimensional space time. The corresponding solutions of...
From Type IIA Black Holes to T-dual Type IIB D-Instantons in N=2, D=4 Supergravity (1997)
Behrndt, Klaus, Gaida, Ingo, Lust, Dieter, Mahapatra, Swapna, Mohaupt, Thomas
We discuss the T-duality between the solutions of type IIA versus IIB superstrings compactified on Calabi-Yau threefolds. Within the context of the N=2, D=4 supergravity effective Lagrangian, the...
Stationary solutions of N=2 supergravity (1997)
Behrndt, Klaus, Lust, Dieter, Sabra, Wafic. A.
We discuss general bosonic stationary configurations of N=2, D=4 supergravity coupled to vector multiplets. The requirement of unbroken supersymmetries imposes constraints on the holomorphic...
On the Duality between the Heterotic String and F-Theory in 8 Dimensions (1996)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter, Mohaupt, Thomas
In this note we compare the moduli spaces of the heterotic string compactified on a two-torus and F-Theory compactified on an elliptic K3 surface for the case of an unbroken E8 x E8 gauge group. The...
Perturbative Couplings and Modular Forms in N=2 String Models with a Wilson Line (1996)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter
We consider a class of four parameter D=4, N=2 string models, namely heterotic strings compactified on K3 times T2 together with their dual type II partners on Calabi-Yau three-folds. With the help...
Modular Symmetries of N=2 Black Holes (1996)
Cardoso, Gabriel Lopes, Lust, Dieter, Mohaupt, Thomas
We discuss the transformation properties of classical extremal N=2 black hole solutions in S-T-U like models under S and T duality. Using invariants of (subgroups of) the triality group, which is the...
BPS Spectra and Non--Perturbative Couplings in N=2,4 Supersymmetric String Theories (1995)
Cardoso, Gabriel Lopes, Curio, Gottfried, Lust, Dieter, Mohaupt, Thomas, Rey, Soo-Jong
We study the BPS spectrum in $D=4, N=4$ heterotic string compactifications, with some emphasis on intermediate $N=4$ BPS states. These intermediate states, which can become short in $N=2$...
Gaugino Condensation in the Chiral and Linear Representation of the Dilaton (1994)
String effective theories with N=1 supersymmetry in four dimensions are subject of the discussion. Gaugino condensation in the chiral representation of the dilaton is reviewed in the truncated...
Some Results on (0,2) Z_N Orbifold Theories with Continuous Wilson Lines (1994)
Cardoso, Gabriel Lopes, Lust, Dieter, Mohaupt, Thomas
We discuss recent results on orbifold compactifications with (0,2) world sheet supersymmetry and continuous Wilson lines, emphasizing the role of modular symmetries. (This work is a contribution to...
Über den Einfluss der Abwasser von Lederfabriken auf Milzbrandbazillen. (1950)
Mainz, Med. F., Diss. v. 23. Juni 1950 (Nicht f. d. Aust.).
On the Cosmology of Type IIA Compactifications on SU(3)-structure Manifolds
Caviezel, Claudio, Koerber, Paul, Kors, Simon, Lust, Dieter, Wrase, Timm, Zagermann, Marco
We study cosmological properties of type IIA compactifications on orientifolds of SU(3)-structure manifolds with non-vanishing geometric flux. These compactifications give rise to effective 4D N=1...
Power of Black Hole Physics: Seeing through the Vacuum Landscape
In this paper we generalize the black hole bound of href{/abs/0706.2050}{arXiv:0706.2050} to de Sitter spaces, and apply it to various vacua in the landscape, with a special emphasis on slow-roll...
String Landscape and the Standard Model of Particle Physics
In this paper we describe ideas about the string landscape, and how to relate it to the physics of the Standard Model of particle physics. First, we give a short status report about heterotic string...