143 citations · 839 across the 21 of their papers we have counts for
21 papers
IIB flux non-commutativity and the global structure of field theories
Iñaki García-Etxebarria, Ben Heidenreich, Diego Regalado
We discuss the origin of the choice of global structure for six dimensional theories and their compactifications in terms of their realization from IIB string theory on ALE…
6d SCFTs and U(1) Flavour Symmetries
Seung-Joo Lee, Diego Regalado, Timo Weigand
We study the behaviour of abelian gauge symmetries in six-dimensional N=(1,0) theories upon decoupling gravity and investigate abelian flavour symmetries in the context of 6d N=(1,…
2d orbifolds with exotic supersymmetry
Ioannis Florakis, Iñaki García-Etxebarria, Dieter Lust +1
We analyse various two dimensional theories arising from compactification of type II and heterotic string theory on asymmetric orbifolds. We find extra supersymmetry generators ari…
Chiral anomalies on a circle and their cancellation in F-theory
Pierre Corvilain, Thomas W. Grimm, Diego Regalado
We study in detail how four-dimensional local anomalies manifest themselves when the theory is compactified on a circle. By integrating out the Kaluza-Klein modes in a way that pre…
four dimensional field theories
Iñaki García-Etxebarria, Diego Regalado
We briefly review a class of four dimensional field theories constructed by taking a quotient of SYM with gauge group . The quotient involves a…
Exceptional theories
Iñaki García-Etxebarria, Diego Regalado
We present a new construction of four dimensional theories, given by M5 branes wrapping a in an M-theory U-fold background. The resulting setup generalizes the…
Supersymmetric Casimir Energy and Transformations
Frederic Brünner, Diego Regalado, Vyacheslav P. Spiridonov
We provide a recipe to extract the supersymmetric Casimir energy of theories defined on primary Hopf surfaces directly from the superconformal index. It involves an $\mathrm{SL(3,\…
Shift-symmetries and gauge coupling functions in orientifolds and F-theory
Pierre Corvilain, Thomas W. Grimm, Diego Regalado
We investigate the field dependence of the gauge coupling functions of four-dimensional Type IIB orientifold and F-theory compactifications with space-time filling seven-branes. In…
N=3 four dimensional field theories
Iñaki García-Etxebarria, Diego Regalado
We introduce a class of four dimensional field theories constructed by quotienting ordinary SYM by particular combinations of R-symmetry and $SL(2,\mathbb{Z}…
D6-branes and axion monodromy inflation
Dagoberto Escobar, Aitor Landete, Fernando Marchesano +1
We develop new scenarios of large field inflation in type IIA string compactifications in which the key ingredient is a D6-brane that creates a potential for a B-field axion. The p…
On dualities for non-Abelian gauge theories with continuous center
Thomas W. Grimm, Diego Regalado
Formulating gauge theories for gauge groups admitting a continuous center can require to include charged scalars to define a gauge-coupling function. We show that the gauge-fields…
Large field inflation from D-branes
Dagoberto Escobar, Aitor Landete, Fernando Marchesano +1
We propose new large field inflation scenarios built on the framework of F-term axion monodromy. Our setup is based on string compactifications where D-branes create potentials for…
Non-Abelian discrete gauge symmetries in F-theory
Thomas W. Grimm, Tom G. Pugh, Diego Regalado
The presence of non-Abelian discrete gauge symmetries in four-dimensional F-theory compactifications is investigated. Such symmetries are shown to arise from seven-brane configurat…
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…
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…
Discrete flavor symmetries in D-brane models
Fernando Marchesano, Diego Regalado, Liliana Vázquez-Mercado
We study the presence of discrete flavor symmetries in D-brane models of particle physics. By analyzing the compact extra dimensions of these models one can determine when such sym…
Non-perturbative effects and Yukawa hierarchies in F-theory SU(5) Unification
Anamaría Font, Luis E. Ibáñez, Fernando Marchesano +1
Local SU(5) F-theory models lead naturally to Yukawa couplings for the third generation of quarks and leptons, but inducing Yukawas for the lighter generations has proven elusive.…
The Intermediate Scale MSSM, the Higgs Mass and F-theory Unification
Luis E. Ibáñez, Fernando Marchesano, Diego Regalado +1
Even if SUSY is not present at the Electro-Weak scale, string theory suggests its presence at some scale M_{SS} below the string scale M_s to guarantee the absence of tachyons. We…
Non-Abelian discrete gauge symmetries in 4d string models
Mikel Berasaluce-Gonzalez, Pablo G. Camara, Fernando Marchesano +2
We study the realization of non-Abelian discrete gauge symmetries in 4d field theory and string theory compactifications. The underlying structure generalizes the Abelian case, and…