330 citations · 4.5k across the 79 of their papers we have counts for
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Gravity Decoupling and Axionic Shift Symmetries
Christian Aoufia, Gonzalo F. Casas, Fernando Marchesano
We analyse the rôle of approximate axionic shift symmetries in gravity-decoupling limits arising in type II Calabi-Yau compactifications. Associated with each shift symmetry there…
Curvature divergences and gravity decoupling in Calabi--Yau rigid limits
Alberto Castellano, Fernando Marchesano, Lorenzo Paoloni
Four-dimensional supergravity theories become rigid in gravity-decoupling limits. We study this effect for type II string compactifications on general Calabi--Yau m…
Curvature divergences in 5d supergravity
Alejandro Blanco, Fernando Marchesano, Luca Melotti
We study the scalar curvature of the vector moduli space of 5d supergravities, obtained by compactifying M-theory on a Calabi--Yau three-fold. We find that …
The Moduli Space Curvature and the Weak Gravity Conjecture
Alberto Castellano, Fernando Marchesano, Luca Melotti +1
We unveil a remarkable interplay between rigid field theories (RFTs), charge-to-mass ratios and scalar curvature divergences in the vector multiplet modu…
Asymptotic curvature divergences and non-gravitational theories
Fernando Marchesano, Luca Melotti, Max Wiesner
We analyse divergences of the scalar curvature of the vector multiplet moduli space of type IIA string theory compactified on a Calabi--Yau , along infinite-distance large v…
On small Dirac Neutrino Masses in String Theory
Gonzalo F. Casas, Luis E. Ibáñez, Fernando Marchesano
We study how tiny Dirac neutrino masses consistent with experimental constraints can arise in string theory SM-like vacua. We use as a laboratory 4d type IIA Calabi--Y…
Yukawa Couplings at Infinite Distance and Swampland Towers in Chiral Theories
Gonzalo F. Casas, Luis E. Ibáñez, Fernando Marchesano
We study limits of vanishing Yukawa couplings of 4d chiral matter fields in Quantum Gravity, using as a laboratory type IIA orientifolds with D6-branes. In these theories chiral fe…
The Standard Model from String Theory: What Have We Learned?
Fernando Marchesano, Gary Shiu, Timo Weigand
Amidst all candidates of physics beyond the Standard Model, string theory provides a unique proposal for incorporating gauge and gravitational interactions. In string theory, a fou…
On the moduli space curvature at infinity
Fernando Marchesano, Luca Melotti, Lorenzo Paoloni
We analyse the scalar curvature of the vector multiplet moduli space of type IIA string theory compactified on a Calabi--Yau manifold . While the volume…
New families of scale separated vacua
Rafael Carrasco, Thibaut Coudarchet, Fernando Marchesano +1
Massive type IIA flux compactifications of the form AdS, where admits a Calabi-Yau metric and O6-planes wrapping three-cycles, display families of vacua with p…
Torsion in cohomology and dimensional reduction
Gonzalo F. Casas, Fernando Marchesano, Matteo Zatti
Conventional wisdom dictates that factors in the integral cohomology group of a compact manifold cannot be computed via smooth -forms…
Symmetric fluxes and small tadpoles
Thibaut Coudarchet, Fernando Marchesano, David Prieto +1
The analysis of type IIB flux vacua on warped Calabi--Yau orientifolds becomes considerably involved for a large number of complex structure fields. We however show that, for a qua…
D-brane and F-theory Model Building
Fernando Marchesano, Bert Schellekens, Timo Weigand
We review recent progress in the construction of four-dimensional vacua of Type II string theory and F-theory which yield the Standard Model of particle physics (SM) or extensions…
EFT strings and emergence
Fernando Marchesano, Luca Melotti
We revisit the Emergence Proposal in 4d vector multiplet sectors that arise from type II string Calabi--Yau compactifications, with emphasis on the role of axionic fun…
Analytics of type IIB flux vacua and their mass spectra
Thibaut Coudarchet, Fernando Marchesano, David Prieto +1
We analyze the tree-level potential of type IIB flux compactifications in warped Calabi-Yau orientifolds, in regions of weak coupling and moderately large complex structure. In thi…
New instabilities for non-supersymmetric AdS orientifold vacua
Fernando Marchesano, Joan Quirant, Matteo Zatti
We consider massive type IIA orientifold compactifications of the form AdS, where admits a Calabi-Yau metric and is threaded by background fluxes. From a 4d vi…
Large Field Distances from EFT strings
Stefano Lanza, Fernando Marchesano, Luca Martucci +1
In any consistent effective field theory of quantum gravity limits of infinite field distance are expected to lead to the EFT breakdown due to the appearance of an infinite tower o…
Membranes in AdS4 orientifold vacua and their Weak Gravity Conjecture
Gonzalo F. Casas, Fernando Marchesano, David Prieto
We study type IIA orientifold compactifications with fluxes that give rise to perturbatively stable, non-supersymmetric AdS vacua with D6-brane gauge sectors. Non-perturbative…
4d strings at strong coupling
Fernando Marchesano, Max Wiesner
Weakly coupled regions of 4d EFTs coupled to gravity are particularly suitable to describe the backreaction of BPS fundamental axionic strings, dubbed EFT strings, in a local patch…
BIonic membranes and AdS instabilities
Fernando Marchesano, David Prieto, Joan Quirant
We study 4d membranes in type IIA flux compactifications of the form AdS, where admits a Calabi--Yau metric. These models feature scale separation and D6-brane…
F-theory flux vacua at large complex structure
Fernando Marchesano, David Prieto, Max Wiesner
We compute the flux-induced F-term potential in 4d F-theory compactifications at large complex structure. In this regime, each complex structure field splits as an axionic field pl…
The EFT stringy viewpoint on large distances
Stefano Lanza, Fernando Marchesano, Luca Martucci +1
We observe a direct relation between the existence of fundamental axionic strings, dubbed EFT strings, and infinite distance limits in 4d EFTs coupled to gravity. T…
A vanishing theorem for T-branes
Fernando Marchesano, Ruxandra Moraru, Raffaele Savelli
We consider regular polystable Higgs pairs on compact complex manifolds. We show that a non-trivial Higgs field restricts the Ricci…
Systematics of Type IIA moduli stabilisation
Fernando Marchesano, David Prieto, Joan Quirant +1
We analyse the flux-induced scalar potential for type IIA orientifolds in the presence of -form, geometric and non-geometric fluxes. Just like in the Calabi-Yau case, the potent…