12 papers
When Black Holes Can Wear Pants
Giacomo Cacciapaglia, Manuel Del Piano, Francesco Sannino +1
We investigate the conditions under which black hole fragmentation, the splitting of a black hole horizon into multiple smaller ones, may occur. The simplest realization is that of…
Completely asymptotically free chiral theories with scalars
Giacomo Cacciapaglia, Francesco Sannino, Sophie Wagner
We provide the conditions for complete asymptotic freedom for chiral gauge theories including scalars, as motivated by grand unified models. These are generalised Georgi-Glashow an…
Systems with Quantum Dimensions
Mikołaj Myszkowski, Mattia Damia Paciarini, Francesco Sannino
We propose quantum-mechanical systems in which the number of spatial dimensions is promoted to a dynamical quantum variable, making the effective dimension state-dependent. Interes…
Toward a unified view of agnostic parametrizations for deformed black holes
Manuel Del Piano, Ciro De Simone, Mattia Damia Paciarini +4
A variety of robust and effective descriptions have been devised to extract model-independent information about the fundamental properties of black holes from observational data wh…
Regular Spacetimes in the Effective Metric Description
Mattia Damia Paciarini, Mikołaj Myszkowski, Francesco Sannino +1
Over the past few decades, significant effort has been directed towards developing various regularized models for compact objects. Recently, a new observable-based parametrization…
Effective Metric Description of Charged Black Holes
Mattia Damia Paciarini, Manuel Del Piano, Stefan Hohenegger +1
Charged black holes arise as solutions of General Relativity (GR) coupled to Maxwell theory. As functions of the mass and charge, they can exhibit extremal behavior, in which case…