40 citations · 117 across the 17 of their papers we have counts for
19 papers
Dark Matter Stability from residual flavour symmetries
Giacomo Landini, Simone Marciano, Federico Mescia
We propose a model-independent framework in which Dark Matter stability emerges naturally from residual discrete symmetries left unbroken by the spontaneous breaking…
Dark Neutrons as Dark Matter: Collisions in Halos and Direct Detection from Dark CP Violation
Pablo Figueroa, Camilo García-Cely, Giacomo Landini
We consider confining gauge theories with a non-vanishing topological angle , which induces CP-violating interactions among dark pions and dark baryons, with dark matter consist…
Constraints on a Light Leptophilic Scalar from Dark-Sector Couplings
Marco Graziani, Giacomo Landini, Federico Mescia +2
We study a minimal framework where a Majorana fermion dark matter particle interacts with a light scalar mediator coupled mainly to electrons. We examine both freeze-out and freeze…
Axion-Like Electrophilic Portal for Pion Dark Matter
Vincenzo Fiorentino, Ji-Heng Guo, Giacomo Landini +1
We investigate a scenario where Strongly Interacting Massive Particle (SIMP) dark matter interacts with an axion-like particle (ALP) that couples exclusively to electrons. This min…
Pion dark matter in a vacuum: a thermal relic with sharp velocity-dependent self-interactions
Camilo García-Cely, Giacomo Landini, Luca Marsili +1
As recently proposed, a non-vanishing topological angle may play a central role in QCD-like theories of dark matter (DM). In this work, we introduce a dark photon portal to the Sta…
Dark Matter in an Evanescent Three-Brane Randall-Sundrum Scenario
Andrea Donini, Miguel G. Folgado, Juan Herrero-García +3
Apart from its gravitational interactions, dark matter (DM) has remained so far elusive in laboratory searches. One possible explanation is that the relevant interactions to explai…
High-quality Peccei-Quinn symmetry from the interplay of vertical and horizontal gauge symmetries
Luca Di Luzio, Giacomo Landini, Federico Mescia +1
We explore a class of axion models where an accidental Peccei-Quinn (PQ) symmetry automatically emerges from the interplay of vertical (grand-unified) and horizonta…
Optical gravitational waves as signals of Gravitationally-Decaying Particles
Giacomo Landini, Alessandro Strumia
Long-lived heavy particles present during the big bang could have a decay channel opened by gravitons. Such decays can produce gravitational waves with large enough abundance to be…
Dark Matter in the High-Scale Seesaw Leptogenesis Paradigm
Juan Herrero-Garcia, Giacomo Landini, Tsutomu T. Yanagida
The seesaw mechanism with three heavy Majorana right-handed neutrinos provides an elegant explanation for neutrino masses and, combined with leptogenesis, can generate the baryon a…
Dark matter in QCD-like theories with a theta vacuum: cosmological and astrophysical implications
Camilo García-Cely, Giacomo Landini, Óscar Zapata
QCD-like theories in which the dark matter (DM) of the Universe is hypothesized to be a thermal relic in the form of a dark pion has been extensively investigated, with most studie…
Dynamical origin of neutrino masses and dark matter from a new confining sector
Maximilian Berbig, Juan Herrero-Garcia, Giacomo Landini
A dynamical mechanism, based on a confining non-abelian dark symmetry, which generates Majorana masses for hypercharge-less fermions, is proposed. We apply it to the inverse seesaw…
Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
Juan Herrero-Garcia, Giacomo Landini, Drona Vatsyayan
The observed dark matter relic abundance may be explained by different mechanisms, such as thermal freeze-out/freeze-in, with one or more symmetric/asymmetric components. In this w…
Dark Matter as dark dwarfs and other macroscopic objects: multiverse relics?
Christian Gross, Giacomo Landini, Alessandro Strumia +1
First-order phase transitions can leave relic pockets of false vacua and their particles, that manifest as macroscopic Dark Matter. We compute one predictive model: a gauge theory…
Gravitational Vector Dark Matter
Christian Gross, Sotirios Karamitsos, Giacomo Landini +1
A new dark sector consisting of a pure non-abelian gauge theory has no renormalizable interaction with SM particles, and can thereby realise gravitational Dark Matter (DM). Gauge i…
Axion quality from the (anti)symmetric of SU(N)
Marco Ardu, Luca Di Luzio, Giacomo Landini +3
We propose two models where a U(1) Peccei-Quinn global symmetry arises accidentally and is respected up to high-dimensional operators, so that the axion solution to the strong CP p…
Dark Matter in scalar Sp(N) gauge dynamics
Giacomo Landini, Jin-Wei Wang
We consider a model with Sp dark gauge group and a scalar field in the fundamental representation, which leads to two co-stable DM candidates at the perturbative level thanks to a…
Scalar gauge dynamics and Dark Matter
Dario Buttazzo, Luca Di Luzio, Parsa Ghorbani +5
We consider theories with one gauge group (SU, SO or Sp) and one scalar in a two-index representation. The renormalizable action often has accidental symmetries (such as global U(1…
Dark Matter from self-dual gauge/Higgs dynamics
Dario Buttazzo, Luca Di Luzio, Giacomo Landini +2
We show that a new gauge group with one new scalar leads to automatically stable Dark Matter candidates. We consider theories where the Higgs phase is dual to the confined phase: i…
Study of the interactions of the axion with mesons and photons using a chiral effective Lagrangian model
Giacomo Landini, Enrico Meggiolaro
We investigate the most interesting decay processes involving axions, photons and the lightest pseudoscalar mesons, making use of a chiral effective Lagrangian model with lig…