65 citations · 638 across the 23 of their papers we have counts for
23 papers
Orbi-S-Folds
Simone Giacomelli, Raffaele Savelli, Gianluca Zoccarato
We introduce a new class of non-compact backgrounds of Type IIB string theory preserving eight supercharges by combining S-folds and non-perturbative 7-branes wrapping orbifolds, a…
Beginners lectures on flux compactifications and related Swampland topics
Thomas Van Riet, Gianluca Zoccarato
These lecture notes provide a pedagogical introduction, with exercises, to the techniques used in attempts to construct vacua with stabilised moduli in string theory. The reader is…
6d SCFTs, Center-Flavor Symmetries, and Stiefel--Whitney Compactifications
Jonathan J. Heckman, Craig Lawrie, Ling Lin +2
The center-flavor symmetry of a gauge theory specifies the global form of consistent gauge and flavor bundle background field configurations. For 6d gauge theories which arise from…
Reflections on the Matter of 3d Vacua and Local Compactifications
Mirjam Cvetič, Jonathan J. Heckman, Ethan Torres +1
We use Higgs bundles to study the 3d vacua obtained from M-theory compactified on a local space given as a four-manifold of ADE singularities with…
S-folds, String Junctions, and 4D SCFTs
Jonathan J. Heckman, Craig Lawrie, Thomas B. Rochais +2
S-folds are a non-perturbative generalization of orientifold 3-planes which figure prominently in the construction of 4D SCFTs and have also recently been used to…
Geometric Unification of Higgs Bundle Vacua
Mirjam Cvetic, Jonathan J. Heckman, Thomas B. Rochais +2
Higgs bundles are a central tool used to study a range of intersecting brane systems in string compactifications. Solutions to the internal gauge theory equations of motion for the…
Yukawa Hierarchies in Global F-theory Models
Mirjam Cvetic, Ling Lin, Muyang Liu +2
We argue that global F-theory compactifications to four dimensions generally exhibit higher rank Yukawa matrices from multiple geometric contributions known as Yukawa points. The h…
T-Branes and Backgrounds
Rodrigo Barbosa, Mirjam Cvetič, Jonathan J. Heckman +3
Compactification of M- / string theory on manifolds with structure yields a wide variety of 4D and 3D physical theories. We analyze the local geometry of such compactificatio…
The two faces of T-branes
Iosif Bena, Johan Blåbäck, Raffaele Savelli +1
We establish a brane-brane duality connecting T-branes to collections of ordinary D-branes. T-branes are intrinsically non-Abelian brane configurations with worldvolume flux, where…
Pixelated Dark Energy
Jonathan J. Heckman, Craig Lawrie, Ling Lin +2
We study the phenomenology of a recent string construction with a quantum mechanically stable dark energy. A mild supersymmetry protects the vacuum energy but also allows $O(10 - 1…
F-theory and Dark Energy
Jonathan J. Heckman, Craig Lawrie, Ling Lin +1
Motivated by its potential use as a starting point for solving various cosmological constant problems, we study F-theory compactified on the warped product $\mathbb{R}_{\text{time}…
Compact G2 holonomy spaces from SU(3) structures
Stefano Andriolo, Gary Shiu, Hagen Triendl +3
We construct novel classes of compact G2 spaces from lifting type IIA flux backgrounds with O6 planes. There exists an extension of IIA Calabi-Yau orientifolds for which some of th…
The Type IIA Flux Potential, 4-forms and Freed-Witten anomalies
Alvaro Herraez, Luis E. Ibanez, Fernando Marchesano +1
We compute the full classical 4d scalar potential of type IIA Calabi-Yau orientifolds in the presence of fluxes and D6-branes. We show that it can be written as a bilinear form $V…
Flux Flattening in Axion Monodromy Inflation
Aitor Landete, Fernando Marchesano, Gary Shiu +1
String theory models of axion monodromy inflation exhibit scalar potentials which are quadratic for small values of the inflaton field and evolve to a more complicated function for…
Partition functions of web diagrams with an O7-plane
Hirotaka Hayashi, Gianluca Zoccarato
We consider the computation of the topological string partition function for 5-brane web diagrams with an O7-plane. Since upon quantum resolution of the orientifold plane these…
Open string multi-branched and Kahler potentials
Federico Carta, Fernando Marchesano, Wieland Staessens +1
We consider type II string compactifications on Calabi-Yau orientifolds with fluxes and D-branes, and analyse the F-term scalar potential that simultaneously involves closed and op…
Fitting fermion masses and mixings in F-theory GUTs
Federico Carta, Fernando Marchesano, Gianluca Zoccarato
We analyse the structure of Yukawa couplings in local SU(5) F-theory models with enhancement. These models are the minimal setting in which the whole flavour structure for th…
Topological vertex for Higgsed 5d theories
Hirotaka Hayashi, Gianluca Zoccarato
We analyse the computation of the partition function of 5d theories in Higgs branches using the topological vertex. The theories are realised by a web of 5-branes who…
Yukawa hierarchies at the point of in F-theory
Fernando Marchesano, Diego Regalado, Gianluca Zoccarato
We analyse the structure of Yukawa couplings in local SU(5) F-theory models with enhancement. In this setting the symmetry is broken down to SU(5) by a 7-brane configur…
On D-brane moduli stabilisation
Fernando Marchesano, Diego Regalado, Gianluca Zoccarato
Standard results in 4d N=1 string compactifications assign a number of moduli to each space-time filling D-brane, computed by analysing the D-brane action in a fixed background. We…
Exact partition functions of Higgsed 5d theories
Hirotaka Hayashi, Gianluca Zoccarato
We present a general prescription by which we can systematically compute exact partition functions of five-dimensional supersymmetric theories which arise in Higgs branches of the…
U(1) mixing and D-brane linear equivalence
Fernando Marchesano, Diego Regalado, Gianluca Zoccarato
Linear equivalence is a criterion that compares submanifolds in the same homology class. We show that, in the context of type II compactifications with D-branes, this concept trans…
Up-type quark masses in SU(5) F-theory models
Anamaría Font, Fernando Marchesano, Diego Regalado +1
F-theory SU(5) unification has been proposed as a scenario where the mass of the top quark is naturally large, as opposed to type II SU(5) models. We analyze this claim from the vi…