301 citations · 3.3k across the 70 of their papers we have counts for
49 papers · 1 filter
Particle Production from Inhomogeneities: the off-shell side of gravitational waves
Michele Redi, Andrea Tesi
We continue the study of particle production from gravitational inhomogeneities in the early Universe. Focusing on sources active on sub-horizon scales, we derive general expressio…
The Too Visible QCD Axion
Luca Di Luzio, Michele Redi, Alessandro Strumia +2
Murayama proposed a GeV-scale axion theory where the up-quark mass term is generated dynamically by the QCD chiral condensate, spontaneously breaking a Peccei-Quinn symmetry. It pr…
Stochastic Dark Matter from Curvature Perturbations
Raghuveer Garani, Michele Redi, Andrea Tesi
We investigate the production of dark matter from curvature perturbations produced during inflation or in standard cosmology, for example during first order phase transitions. Pert…
Early vs late string networks from a minimal QCD Axion
Marco Gorghetto, Edward Hardy, Horia Nicolaescu +2
We propose a new regime of minimal QCD axion dark matter that lies between the pre- and post-inflationary scenarios, such that the Peccei-Quinn (PQ) symmetry is restored only on su…
Neutrinos, Dark Matter and Higgs Vacua in Parity Solutions of the strong CP problem
Michele Redi, Andrea Tesi
The strong CP problem can be solved if the laws of nature are invariant under a space-time parity exchanging the Standard Model with its mirror copy. We review and extend different…
The meso-inflationary QCD axion
Michele Redi, Andrea Tesi
We study the possibility that the axion Peccei-Quinn symmetry is spontaneously broken after the beginning of inflation. This scenario interpolates between pre-inflationary and post…
Jump Starting the Dark Sector with a Phase Transition
Michele Redi, Andrea Tesi
We study the possibility to populate the dark sector through a phase transition. We will consider secluded dark sectors made of gauge theories, Randall-Sundrum scenarios and confor…
Dark Photon Dark Matter without Stueckelberg Mass
Michele Redi, Andrea Tesi
We study the scenario of dark photon Dark Matter where the mass is generated through the Higgs mechanism rather than the constant Stueckelberg mass. In this construction the dark s…
Dark matter self-interactions in the matter power spectrum
Raghuveer Garani, Michele Redi, Andrea Tesi
We study the imprints of secluded dark sectors with a mass gap and self-interactions on the matter power spectrum. When Dark Matter (DM) is sufficiently light, in the ballpark of a…
General Freeze-in and Freeze-out
Michele Redi, Andrea Tesi
We use the framework of relativistic and non-relativistic conformal field theories (CFT) to derive general results relevant for the production of weakly coupled and strongly couple…
Dark QCD Matters
Raghuveer Garani, Michele Redi, Andrea Tesi
We investigate the nightmare scenario of dark sectors that are made of non-abelian gauge theories with fermions, gravitationally coupled to the Standard Model (SM). While testing t…
Gravitational Production of a Conformal Dark Sector
Michele Redi, Andrea Tesi, Hannah Tillim
Dark sectors with purely gravitational couplings to the Standard Model are unavoidably populated from the SM plasma by graviton exchange, and naturally provide DM candidates. We ex…
Dark Matter from 't Hooft Anomaly Matching
Michele Redi
Light fermions that arise as composite states in confining gauge theories are stable due to fermion number conservation. This leads to Dark Matter candidates that behave similarly…
Dark Nucleosynthesis: Cross-sections and Astrophysical Signals
Rakhi Mahbubani, Michele Redi, Andrea Tesi
We investigate dark matter bound-state formation and its implication for indirect-detection experiments. We focus on the case where dark matter is a baryon of a strongly-coupled da…
Gravitational Waves from Supercool Axions
Luigi Delle Rose, Giuliano Panico, Michele Redi +1
We study the dynamics of the Peccei-Quinn (PQ) phase transition for the QCD axion. In weakly coupled models the transition is typically second order except in the region of paramet…
Indirect Detection of Composite (Asymmetric) Dark Matter
Rakhi Mahbubani, Michele Redi, Andrea Tesi
Dark Matter can form bound states upon the emission of quanta of energy equal to the binding energy. The rate of this process is large for strongly-interacting Dark Matter, and fur…
Coset Cosmology
Luca Di Luzio, Michele Redi, Alessandro Strumia +1
We show that the potential of Nambu-Goldstone bosons can have two or more local minima e.g. at antipodal positions in the vacuum manifold. This happens in many models of composite…
Cosmological Production of Dark Nuclei
Michele Redi, Andrea Tesi
We study the formation of Dark Matter nuclei in scenarios where DM particles are baryons of a new confining gauge force. The dark nucleosynthesis is analogous to the formation of l…
Cosmological Abundance of Colored Relics
Christian Gross, Andrea Mitridate, Michele Redi +2
The relic cosmological abundance of stable or long-lived neutral colored particles gets reduced by about a few orders of magnitude by annihilations that occur after QCD confinement…
Gluequark Dark Matter
Roberto Contino, Andrea Mitridate, Alessandro Podo +1
We introduce the gluequark Dark Matter candidate, an accidentally stable bound state made of adjoint fermions and gluons from a new confining gauge force. Such scenario displays an…
An almost elementary Higgs: Theory and Practice
Daniele Barducci, Stefania De Curtis, Michele Redi +1
We study models that interpolate between an elementary and a composite Higgs boson. Such models, arising in theories with new vector-like fermions with electro-weak quantum numbers…
Colored Dark Matter
Valerio De Luca, Andrea Mitridate, Michele Redi +2
We explore the possibility that Dark Matter is the lightest hadron made of two stable color octet Dirac fermions . The cosmological DM abundance is reproduced for $M_{\ca…
Dark Matter as a weakly coupled Dark Baryon
Andrea Mitridate, Michele Redi, Juri Smirnov +1
Dark Matter might be an accidentally stable baryon of a new confining gauge interaction. We extend previous studies exploring the possibility that the DM is made of dark quarks hea…
Cosmological Implications of Dark Matter Bound States
Andrea Mitridate, Michele Redi, Juri Smirnov +1
We present generic formulae for computing how Sommerfeld corrections together with bound-state formation affects the thermal abundance of Dark Matter with non-abelian gauge interac…