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...
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...
Electric/magnetic duality for chiral gauge theories with anomaly cancellation (2008)
De Rydt, Jan, Schmidt, Torsten T, Trigiante, Mario, Van Proeyen, Antoine, Zagermann, Marco
We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic...
Electric/magnetic duality for chiral gauge theories with anomaly cancellation (2008)
De Rydt, Jan, Schmidt, Torsten T., Trigiante, Mario, Van Proeyen, Antoine, Zagermann, Marco
We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic...
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...
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...
Generalized Chern-Simons Terms and Chiral Anomalies in N=1 Supersymmetry (2008)
The gauging of axionic, Stueckelberg-type, shift symmetries with generalized Chern-Simons terms and the Green-Schwarz mechanism of anomaly cancellation has recently been studied in the context of...
Electric/magnetic duality for chiral gauge theories with anomaly cancellation (2008)
Rydt, Jan De, Schmidt, Torsten T., Trigiante, Mario, Proeyen, Antoine Van, Zagermann, Marco
We show that 4D gauge theories with Green-Schwarz anomaly cancellation and possible generalized Chern-Simons terms admit a formulation that is manifestly covariant with respect to electric/magnetic...
Symplectic structure of N=1 supergravity with anomalies and Chern-Simons terms (2007)
De Rydt, Jan, Rosseel, Jan, Schmidt, Torsten T., Van Proeyen, Antoine, Zagermann, Marco
The general actions of matter-coupled N=1 supergravity have Peccei-Quinn terms that may violate gauge and supersymmetry invariance. In addition, N=1 supergravity with vector multiplets may also...
Gaugino condensates and D-terms from D7-branes (2007)
Krefl, Daniel, Luest, Dieter, 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...
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...
Symplectic structure of N=1 supergravity with anomalies and Chern-Simons terms (2007)
Rydt, Jan De, Rosseel, Jan, Schmidt, Torsten T., Proeyen, Antoine Van, Zagermann, Marco
The general actions of matter-coupled N=1 supergravity have Peccei-Quinn terms that may violate gauge and supersymmetry invariance. In addition, N=1 supergravity with vector multiplets may also...
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...
The R-map and the Coupling of N=2 Tensor Multiplets in 5 and 4 Dimensions (2006)
Gunaydin, Murat, McReynolds, Sean, Zagermann, Marco
We study the dimensional reduction of five dimensional N=2 Yang-Mills-Einstein supergravity theories (YMESGT) coupled to tensor multiplets. The resulting 4D theories involve first order interactions...
Brane Inflation, Solitons and Cosmological Solutions: I (2005)
Chen, Pisin, Dasgupta, Keshav, Narayan, K., Shmakova, Marina, Zagermann, Marco
In this paper we study various cosmological solutions for a D3/D7 system directly from M-theory with fluxes and M2-branes. In M-theory, these solutions exist only if we incorporate higher derivative...
N=4 "Fake" Supergravity (2004)
We study curved and flat BPS-domain walls in 5D, N=4 gauged supergravity and show that their effective dynamics along the flow is described by a generalized form of "fake supergravity". This...
On the fakeness of fake supergravity (2004)
Celi, Alessio, Ceresole, Anna, Dall'Agata, Gianguido, Van Proeyen, Antoine, Zagermann, Marco
We revisit and complete the study of curved BPS-domain walls in matter-coupled 5D, N=2 supergravity and carefully analyse the relation to gravitational theories known as "fake supergravities". We...
D3/D7 Brane Inflation and Semilocal Strings (2004)
Dasgupta, Keshav, Hsu, Jonathan P., Kallosh, Renata, Linde, Andrei, Zagermann, Marco
Among the inflationary models based on string theory, the D3/D7 model has the advantage that the flatness of the inflaton potential can be protected even with moduli stabilization. However, the...
Unified Maxwell-Einstein and Yang-Mills-Einstein Supergravity Theories in Five Dimensions (2003)
Gunaydin, Murat, Zagermann, Marco
Unified N=2 Maxwell-Einstein supergravity theories (MESGTs) are supergravity theories in which all the vector fields, including the graviphoton, transform in an irreducible representation of a simple...
Effective Actions near Singularities (2003)
Louis, J, Mohaupt, T, Zagermann, Marco
We study the heterotic string compactified on K3 x T^2 near the line T=U, where the effective action becomes singular due to an SU(2) gauge symmetry enhancement. By `integrating in' the light W^\pm...
Effective Actions Near Singularities: The STU-Model (2003)
We derive the low energy effective action of the STU-model in four and five dimensions near the line T=U, where SU(2) gauge symmetry enhancement occurs. By `integrating in' the light W^{\pm} bosons...
Effective Actions near Singularities (2003)
Louis, Jan, Mohaupt, Thomas, Zagermann, Marco
We study the heterotic string compactified on K3 x T^2 near the line T=U, where the effective action becomes singular due to an SU(2) gauge symmetry enhancement. By `integrating in' the light W^\pm...
Effective Actions Near Singularities: The STU-Model (2003)
We derive the low energy effective action of the STU-model in four and five dimensions near the line T=U, where SU(2) gauge symmetry enhancement occurs. By `integrating in' the light W^{\pm} bosons...
Orbifolds and Flows from Gauged Supergravity (2002)
Corrado, Richard, Gunaydin, Murat, Warner, Nicholas P., Zagermann, Marco
We examine orbifolds of the IIB string via gauged supergravity. For the gravity duals of the A_{n-1} quiver gauge theories, we extract the massless degrees of freedom and assemble them into...
Options for Gauge Groups in Five-Dimensional Supergravity (2001)
Ellis, Jonathan Richard, Günaydin, M, Zagermann, Marco
Motivated by the possibility that physics may be effectively five-dimensional over some range of distance scales, we study the possible gaugings of five-dimensional N=2 supergravity. Using a...
Gauged Supergravity and Singular Calabi-Yau Manifolds (2001)
Mohaupt, Thomas, Zagermann, Marco
Compactifications of M-theory on singular manifolds contain additional charged massless states descending from M-branes wrapped on vanishing cycles. We construct the first explicit example of a...
Options for Gauge Groups in Five-Dimensional Supergravity (2001)
Ellis, John, Gunaydin, Murat, Zagermann, Marco
Motivated by the possibility that physics may be effectively five-dimensional over some range of distance scales, we study the possible gaugings of five-dimensional N=2 supergravity. Using a...
General Matter Coupled N=4 Gauged Supergravity in Five Dimensions (2001)
Dall'Agata, Gianguido, Herrmann, Carl, Zagermann, Marco
We construct the general form of matter coupled N=4 gauged supergravity in five dimensions. Depending on the structure of the gauge group, these theories are found to involve vector and/or tensor...
We show that certain 5d, N=2 Yang-Mills/Einstein supergravity theories admit the gauging of the \emph{full} R-symmetry group, $SU(2)_{R}$, of the underlying $\mathcal{N}=2$ Poincar\'{e} superalgebra....
Gunaydin, Murat, Zagermann, Marco
We show that certain five dimensional, N=2 Yang-Mills/Einstein supergravity theories admit the gauging of the full R-symmetry group, SU(2)_R, of the underlying N=2 Poincare superalgebra. This...
The Vacua of 5d, N=2 Gauged Yang-Mills/Einstein/Tensor Supergravity: Abelian Case (2000)
We give a detailed study of the critical points of the potentials of thesimplest non-trivial N=2 gauged Yang-Mills/Einstein supergravity theories withtensor multiplets. The scalar field target space...
The Vacua of 5d,N=2 Gauged Yang-Mills/Einstein/Tensor Supergravity: Abelian Case (2000)
Gunaydin, Murat, Zagermann, Marco
We give a detailed study of the critical points of the potentials of the simplest non-trivial N=2 gauged Yang-Mills/Einstein supergravity theories with tensor multiplets. The scalar field target...
We study the general gaugings of N=2 Maxwell-Einstein supergravity theories (MESGT) in five dimensions, extending and generalizing previous work. The global symmetries of these theories are of the...
Gunaydin, Murat, Zagermann, Marco
We study the general gaugings of N=2 Maxwell-Einstein supergravity theories (MESGT) in five dimensions, extending and generalizing previous work. The global symmetries of these theories are of the...
Dimensionally Reduced Gravity, Hermitian Symmetric Spaces and the Ashtekar Variables (1999)
Brodbeck, Othmar, Zagermann, Marco
Dimensional reductions of various higher dimensional (super)gravity theories lead to effectively two-dimensional field theories described by gravity coupled G/H nonlinear sigma-models. We show that a...
Metric Versus Ashtekar Variables in Two Killing Field Reduced Gravity (1997)
The relation between the SL(2,R)/SO(2)- and the SL(2,C)-chiral model that naturally arise within the metric respectively the Ashtekar formulation of two Killing field reduced Einstein gravity is...
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...
Generalized Chern-Simons Terms and Chiral Anomalies in N=1 Supersymmetry
The gauging of axionic, Stueckelberg-type, shift symmetries with generalized Chern-Simons terms and the Green-Schwarz mechanism of anomaly cancellation has recently been studied in the context of...