59 citations · 298 across the 29 of their papers we have counts for
15 papers · 1 filter
Cosmological Implications of the Slingshot Effect: Gravitational Waves, Primordial Black Holes and Dark Matter
Maximilian Bachmaier, Gia Dvali, Juan Sebastián Valbuena-Bermúdez +1
In this paper, we explore the implications of the so-called slingshot effect. It represents a rather general phenomenon occurring when a localized source, such as a monopole, quark…
On the predictivity of axion dark matter in the presence of Peccei-Quinn breaking
Michael Zantedeschi
It is shown that the post-inflationary quantum chromodynamics (QCD) axion need not lead to a unique one-parameter prediction for the dark matter abundance whenever small explicit P…
The fast, the slow and the merging: probes of evaporating memory burdened PBHs
Alessandro Dondarini, Giulio Marino, Paolo Panci +1
The so-called memory-burden effect implies that evaporating Primordial Black Holes (PBHs) inevitably stabilize before complete decay. This stabilization opens a new mass window for…
A minimal Pati-Salam theory: from cosmic defects to gravitational waves and colliders
Goran Senjanović, Michael Zantedeschi
We discuss a minimal renormalizable Pati-Salam theory based on the gauge group, with unification scale Higgs multiplet…
Transitioning to Memory Burden: Detectable Small Primordial Black Holes as Dark Matter
Gia Dvali, Michael Zantedeschi, Sebastian Zell
Mounting theoretical evidence suggests that black holes are subjected to the memory burden effect, implying that after certain time the information stored in them suppresses the de…
theory on the plateau: the importance of being renormalizable
Anca Preda, Goran Senjanović, Michael Zantedeschi
We revisit a minimal renormalisable grand unified theory, with the Higgs representation , and complex , responsible for the unificati…
Minimal SO(10) ante portas: the importance of being effective
Anca Preda, Goran Senjanović, Michael Zantedeschi
The minimal grand unified theory, augmented by higher-dimensional operators, is based on the following Higgs representations: adjoint , spinor and…
Do neutrinos bend? Consequences of an ultralight gauge field as dark matter
Luca Visinelli, Tsutomu T. Yanagida, Michael Zantedeschi
An ultralight gauge boson could address the missing cosmic dark matter, with its transverse modes contributing to a relevant component of the galactic halo today. We show that, in…
Minimal SU(5) theory on the edge: the importance of being effective
Goran Senjanović, Michael Zantedeschi
It is well known that the minimal renormalizable grand unified theory is ruled out: it predicts same masses of down quarks and charged leptons, the gauge couplings do not u…
Vortex Effects in Merging Black Holes and Saturons
Gia Dvali, Oleg Kaikov, Florian Kuhnel +2
Vorticity has recently been suggested to be a property of highly-spinning black holes. The connection between vorticity and limiting spin represents a universal feature shared by o…
Confinement Slingshot and Gravitational Waves
Maximilian Bachmaier, Gia Dvali, Juan Sebastián Valbuena-Bermúdez +1
In this paper, we introduce and numerically simulate a quantum field theoretic phenomenon called the gauge ``slingshot" effect and study its production of gravitational waves. The…
Grand unification, small vs large representations, hadron colliders and all that
Goran Senjanović, Michael Zantedeschi
We review minimal realistic grand unified models based on and gauge groups. The models with small Higgs representations and higher dimensional operators - under th…
grand unification and -boson mass
Goran Senjanović, Michael Zantedeschi
A realistic extension of the minimal theory consisting of the addition of an adjoint fermion is known to predict light real fermion and scalar weak triplets, potentially ac…
SO(10): a Case for Hadron Colliders
Anca Preda, Goran Senjanovic, Michael Zantedeschi
We study the mass scales in the grand unified theory based on the following minimal Higgs representation content: adjoint , spinor and complex vec…
Primordial Black Holes from Confinement
Gia Dvali, Florian Kuhnel, Michael Zantedeschi
A mechanism for the formation of primordial black holes is proposed. Here, heavy quarks of a confining gauge theory produced by de Sitter fluctuations are pushed apart by inflation…