67 citations · 254 across the 13 of their papers we have counts for
13 papers
Probing optimisation in physics-informed neural networks
Nayara Fonseca, Veronica Guidetti, Will Trojak
A novel comparison is presented of the effect of optimiser choice on the accuracy of physics-informed neural networks (PINNs). To give insight into why some optimisers are better,…
Probing photophobic (rel)axion dark matter
Nayara Fonseca, Enrico Morgante
We investigate the interplay between early universe cosmology and dark matter direct detection, considering axion models with naturally suppressed couplings to photons. In the cont…
Relaxion Fluctuations (Self-stopping Relaxion) and Overview of Relaxion Stopping Mechanisms
Nayara Fonseca, Enrico Morgante, Ryosuke Sato +1
In implementations of the electroweak scale cosmological relaxation mechanism proposed so far, the effect of the quantum fluctuations of the homogeneous relaxion field has been ign…
Axion Fragmentation
Nayara Fonseca, Enrico Morgante, Ryosuke Sato +1
We investigate the production of axion quanta during the early universe evolution of an axion-like field rolling down a wiggly potential. We compute the growth of quantum fluctuati…
The Super-Planckian Axion Strikes Back
Nayara Fonseca, Benedict von Harling, Leonardo de Lima +1
We present a novel framework for obtaining large hierarchies in axion decay constants as well as trans-Planckian field excursions, with no need for tuning or a large number of fiel…
Relaxion Dark Matter
Nayara Fonseca, Enrico Morgante
We highlight a new connection between the Standard Model hierarchy problem and the dark matter sector. The key piece is the relaxion field, which besides scanning the Higgs mass an…
Higgs relaxation after inflation
Nayara Fonseca, Enrico Morgante, Geraldine Servant
We show that the mechanism of cosmological relaxation of the electroweak scale can take place independently of the inflation mechanism, thus relieving burdens from the original rel…
A warped relaxion
Nayara Fonseca, Benedict von Harling, Leonardo de Lima +1
We construct a UV completion of the relaxion in a warped extra dimension. We identify the relaxion with the zero mode of the fifth component of a bulk gauge field and show how hier…
N-Relaxion: Large Field Excursions from a Few Site Relaxion Model
Nayara Fonseca, Leonardo de Lima, Camila S. Machado +1
Relaxion models are an interesting new avenue to explain the radiative stability of the Standard Model scalar sector. They require very large field excursions, which are difficult…
Dark Matter, Shared Asymmetries, and Galactic Gamma Ray Signals
Nayara Fonseca, Lina Necib, Jesse Thaler
We introduce a novel dark matter scenario where the visible sector and the dark sector share a common asymmetry. The two sectors are connected through an unstable mediator with bar…
Dark Matter Constraints on Composite Higgs Models
Nayara Fonseca, Renata Zukanovich Funchal, Andre Lessa +1
In composite Higgs models the pseudo-Nambu-Goldstone Boson (pNGB) nature of the Higgs field is an interesting alternative for explaning the smallness of the electroweak scale with…
Resonances from Quiver Theories at the LHC
Gustavo Burdman, Nayara Fonseca, Gabriela Lichtenstein
We consider the collider signals of spin-one resonances present in full-hierarchy quiver theories of electroweak symmetry breaking. These four-dimensional theories result from the…
Full-hierarchy Quiver Theories of Electroweak Symmetry Breaking and Fermion Masses
Gustavo Burdman, Nayara Fonseca, Leonardo de Lima
We consider quiver theories in four dimensions with a large ultra-violet cutoff. These theories require that an ordered set of vacuum expectation values for the link fields develop…