29 citations · 128 across the 20 of their papers we have counts for
21 papers
Vector Dark Matter from Extra Dimensions
Arturo de Giorgi, Stefan Vogl
In this work, we propose a new natural dark matter candidate: Kaluza-Klein towers of vectors from extra-dimensional models. Their naturalness follows from two key feature…
The Dark Dimension and Majorana Neutrinos
Arturo de Giorgi, Dhruv Pasari
Recent developments in the Swampland program motivate the existence of a mesoscopic Dark Dimension of size m with bulk Majorana fermions in the keV range. Motivate…
Stochastic Tsunamis: Diffuse Scalar Background from Black Hole Formation
Arturo de Giorgi, Joerg Jaeckel
Massive astrophysical objects can source huge static configurations of a scalar field. When such an object ends up forming a black hole, for instance, via a core-collapse supernova…
LHC Constraints on Resonant Kaluza-Klein Gravitons
Arturo de Giorgi, Matteo Marcoli, Federico Silvetti
The signature prediction of extra-dimensional theories is the appearance of a tower of massive gravitons. In this work, we study the constraints on resonant heavy spin-2 particles…
Thermal Metastable Strings in One-Scale Models and Gravitational Waves
Arturo de Giorgi, James Ingoldby, Valentin V. Khoze +1
Metastable cosmic strings provide a cosmological interpretation of the nanohertz stochastic gravitational wave background reported by Pulsar Timing Array (PTA) experiments. We revi…
The Majoron Cosmological Window: Dark Matter and Thermal Leptogenesis
Arturo de Giorgi, Daniel Naredo-Tuero, Xavier Ponce Díaz
The majoron is the Nambu-Goldstone boson associated with the spontaneous breaking of a global symmetry. Remarkably, the minimal majoron framework can simultaneously address t…
Neutrino Constraints on Scalar-Tensor Gravity
Arturo de Giorgi, Ivan Martinez Soler, Sergio Sevillano Muñoz
In this work, we derive novel constraints on scalar-tensor theories from neutrino physics. Spatial variations of the background scalar field effectively generate density and positi…
Do neutrinos dream in 5D? Towards a comprehensive extra-dimensional neutrino phenomenology
Arturo de Giorgi, Dhruv Pasari, Jessica Turner
This paper provides a comprehensive overview of neutrino masses and mixing in Large Extra Dimension scenarios, focusing on the phenomenological impact of a five-dimensional (5D) bu…
Star Shearing Season -- Transient Signals in Wave-like Dark Matter Experiments from Black Hole Formation
Arturo de Giorgi, Joerg Jaeckel
Ordinary matter coupled to light weakly interacting bosons can lead to the formation of a macroscopic bosonic field in the vicinity of large matter concentrations such as ordinary…
ALPs and HNLs at LHC and Muon Colliders: Uncovering New Couplings and Signals
Marta Burgos Marcos, Arturo de Giorgi, Luca Merlo +1
Axion-like particles (ALPs) and heavy neutral leptons (HNLs) are two well-motivated classes of particles beyond the Standard Model. It is intriguing to explore the new detection op…
Visible GeV ALP from TeV Vector-like Leptons
Arturo de Giorgi, Marta Fuentes Zamoro, Luca Merlo
We present a model where a GeV axion-like-particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei-Quinn symmetry-breaking terms…
The Minimal Massive Majoron Seesaw Model
Arturo de Giorgi, Luca Merlo, Xavier Ponce Díaz +1
A convincing explanation of the smallness of neutrino masses is represented by the Type-I Seesaw mechanism, where the two measured neutrino mass differences can be generated by int…
Gravity-Matter Sum Rules in models with a single extra-dimension
A. de Giorgi, S. Vogl
We prove a set of sum rules needed for KK-graviton pair production from matter in orbifolded extra-dimensional models. The sum rules can be found in full generality by considering…
Low Seesaw Scale Solution for and
A. de Giorgi, L. Merlo, S. Pokorski
In this short talk, we present a renormalizable model that can i) generate neutrino masses via a low-scale seesaw mechanism and ii) solve the long-standing and the more r…
Flavour and Higgs physics in -symmetric 2HD models near the decoupling limit
Arturo de Giorgi, Fotis Koutroulis, Luca Merlo +1
With no evidence of any exotic particle detected so far beyond the Standard Model, the new physics may lie above the presently accessible energies at colliders and, at low-energies…
Probing HNL-ALP couplings at colliders
Arturo de Giorgi, Luca Merlo, Jean-Loup Tastet
Axion-like particles (ALPs) and heavy neutral leptons (HNLs) are both well-motivated extensions of the Standard Model. As ALPs couple to on-shell fermions proportionally to their m…
The Low-Scale Seesaw Solution to the and Anomalies
Arturo de Giorgi, Luca Merlo, Stefan Pokorski
The recent CDF-II measurement of the -boson mass shows a strong tension with the corresponding Standard Model prediction. Once active neutrino masses are explained in the contex…
The cost of an ALP solution to the neutral -anomalies
J. Bonilla, A. de Giorgi, B. Gavela +2
The neutral anomalies in decays are analysed in terms of the tree-level exchange of an axion-like-particle (ALP), within the effective field theory framework. The complete two-…
Warm dark matter from a gravitational freeze-in in extra dimensions
Arturo de Giorgi, Stefan Vogl
We study the freeze-in of gravitationally interacting dark matter in extra dimensions. Focusing on a minimal dark matter candidate that only interacts with the SM via gravity in a…
Searching for BSM Physics in Yukawa Couplings and Flavour Symmetries
J. Alonso-Gonzalez, A. de Giorgi, L. Merlo +1
In the framework of the Standard Model Effective Field Theory, we compare the lower bounds on the scale of new physics possibly contributing to the effective couplings,…
Dark matter interacting via a massive spin-2 mediator in warped extra-dimensions
Arturo de Giorgi, Stefan Vogl
We study dark matter interacting via a massive spin-2 mediator. To have a consistent effective theory for the spin-2 particle, we work in a warped extra-dimensional model such that…