Francesco Sannino
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View article: Exact Results for the Spectrum of the Ising Conformal Field Theory
Exact Results for the Spectrum of the Ising Conformal Field Theory Open
We develop a semiclassical framework to determine scaling dimensions of neutral composite operators in scalar conformal field theories. For the critical Ising $λϕ^4$ theory in $d=4-ε$, we obtain the full spectrum of composite operators bui…
View article: Toward a unified view of agnostic parametrizations for deformed black holes
Toward a unified view of agnostic parametrizations for deformed black holes Open
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 when searching for deviations from general relativity. In thi…
View article: The Good Qualities of the Weak Axion
The Good Qualities of the Weak Axion Open
The presence of a topological susceptibility in the electroweak sector of the Standard Model motivates the existence of a good quality weak axion $a_W$, associated with the spontaneous breaking of $B\!+\!L$. Its anomalous couplings and tin…
View article: Unveiling the Quantum Nature of Black Holes: Towards a Proof of Hawking Radiation through Gamma-Ray Observations
Unveiling the Quantum Nature of Black Holes: Towards a Proof of Hawking Radiation through Gamma-Ray Observations Open
Hawking's groundbreaking prediction that black holes emit thermal radiation and ultimately evaporate remains unverified due to the extreme faintness of this radiation for stellar-mass or larger black holes. In this study, we explore a nove…
View article: Hiding in Plain Sight, the electroweak $η_W$
Hiding in Plain Sight, the electroweak $η_W$ Open
The presence of a topological susceptibility in the electroweak sector of the Standard Model implies the existence of a pseudoscalar state in the spectrum, $η_W$. We show that, within the Standard Model, no new particle is required to form…
View article: Effective metric description of charged black holes
Effective metric description of charged black holes Open
View article: On the θ-angle physics of QCD under pressure: the strange and isospin phase diagram
On the θ-angle physics of QCD under pressure: the strange and isospin phase diagram Open
A bstract We unveil the impact of the θ -angle on the QCD phase diagram at nonzero isospin and strangeness chemical potentials for three light flavors and different quark mass ratios. We establish the phase boundaries as well as the nature…
View article: Comment to "The asymptotically-free gauge theories"
Comment to "The asymptotically-free gauge theories" Open
The recent paper "The asymptotically-free gauge theories" by Ben Gripaios and Khoi Le Nguyen Nguyen [arXiv:2507.12348] presents a proposed classification of gauge theories valid down to arbitrarily short scales. In this comment, we aim to …
View article: Looking for black hole morsels in astrophysical mergers via Hawking radiation
Looking for black hole morsels in astrophysical mergers via Hawking radiation Open
International audience
View article: Grand-unification Theory Atlas: Standard Model and Beyond
Grand-unification Theory Atlas: Standard Model and Beyond Open
Under a reasonable set of ab-initio assumptions, we define and chart the atlas of simple gauge theories with families of fermions whose masses are forbidden by gauge invariance. We propose a compass to navigate the atlas based on counting …
View article: Regular Spacetimes in the Effective Metric Description
Regular Spacetimes in the Effective Metric Description Open
Over the past few decades, significant effort has been directed towards developing various regularized models for compact objects. Recently, a new observable-based parametrization was introduced to account for black hole deformations in a …
View article: Effective metric description of 2+1 dimensional quantum black holes
Effective metric description of 2+1 dimensional quantum black holes Open
We develop an effective metric description of 2+1 dimensional black holes describing deviations from the classical Ban̈ados–Teitelboim–Zanelli (BTZ) black hole. The latter is a classical 2+1 dimensional rotating black hole with constant neg…
View article: Consistency Relation for Fixed Point Dynamics
Consistency Relation for Fixed Point Dynamics Open
We gain insight on the fixed point dynamics of $d$ dimensional quantum field theories by exploiting the critical behavior of the $d-ε$ sister theories. To this end we first derive a self-consistent relation between the $d-ε$ scaling expone…
View article: Black hole shadow and other observables away from the horizon: Extending the effective metric descriptions
Black hole shadow and other observables away from the horizon: Extending the effective metric descriptions Open
In previous work we have developed a model-independent, effective description of quantum deformed, spherically symmetric and static black holes in four dimensions. The deformations of the metric are captured by two functions of the physica…
View article: Exact results for scaling dimensions of neutral operators in scalar conformal field theories
Exact results for scaling dimensions of neutral operators in scalar conformal field theories Open
We determine the scaling dimension Δn for the class of composite operators ϕn in the λϕ4 theory in d=4−ε taking the double scaling limit n→∞ and λ→0 with fixed λn via a semiclassical approach. Our results resum the leading power of n at an…
View article: Charting standard model duality and its signatures
Charting standard model duality and its signatures Open
We investigate high and low energy implications of a gauge dual description of the Standard Model. The high energy electric theory features gauge dynamics involving only fermionic matter fields, while the low energy magnetic description fe…
View article: On the $θ$-angle physics of QCD under pressure: The strange and isospin phase diagram
On the $θ$-angle physics of QCD under pressure: The strange and isospin phase diagram Open
We unveil the impact of the $θ$-angle on the QCD phase diagram at nonzero isospin and strangeness chemical potentials for three light flavors and different quark mass ratios. We establish the phase boundaries as well as the nature of the a…
View article: A Temporal Playbook for Multiple Wave Dengue Pandemic from Latin America and Asia to Italy
A Temporal Playbook for Multiple Wave Dengue Pandemic from Latin America and Asia to Italy Open
View article: Effective metric descriptions of quantum black holes
Effective metric descriptions of quantum black holes Open
View article: Dilatonic dynamics of baryonic crystals, branes, and spheres
Dilatonic dynamics of baryonic crystals, branes, and spheres Open
We systematically analyze the impact of dilatonic dynamics on Skyrme spheres, crystals, and branes. The effects of the dilatonic model parameters, encompassing different underlying near-conformal dynamics, on the macroscopic properties of …
View article: Renormalisation group methods for effective epidemiological models
Renormalisation group methods for effective epidemiological models Open
International audience
View article: A Temporal Playbook for Multiple Wave Dengue Pandemic from Latin America and Asia to Italy
A Temporal Playbook for Multiple Wave Dengue Pandemic from Latin America and Asia to Italy Open
We show that the epidemiological Renormalization Group (eRG) framework is a useful and minimal tool to effectively describe the temporal evolution of the Dengue multi-wave pandemics. We test the framework on the Dengue history of several c…
View article: Defect induced heavy meson dynamics in the QCD conformal window
Defect induced heavy meson dynamics in the QCD conformal window Open
Upon introducing a heavy quark in the perturbative regime of the QCD conformal window we precisely determine the associated heavy meson spectrum and wave functions in terms of the number of light flavors and mass. We then compute the confo…
View article: Exact Results for Scaling Dimensions of Neutral Operators in scalar CFTs
Exact Results for Scaling Dimensions of Neutral Operators in scalar CFTs Open
We determine the scaling dimension $Δ_n$ for the class of composite operators $ϕ^n$ in the $λϕ^4$ theory in $d=4-ε$ taking the double scaling limit $n\rightarrow \infty$ and $λ\rightarrow 0$ with fixed $λn$ via a semiclassical approach. Ou…
View article: Information index augmented eRG to model vaccination behaviour: A case study of COVID-19 in the US
Information index augmented eRG to model vaccination behaviour: A case study of COVID-19 in the US Open
Recent pandemics triggered the development of a number of mathematical models and computational tools apt at curbing the socio-economic impact of these and future pandemics. The need to acquire solid estimates from the data led to the intr…
View article: New physics pathways from B processes
New physics pathways from B processes Open
We re-consider recent measures of RK and RK⁎, now compatible with the Standard Model expectations, as well as the results for the process BR(Bs→μ+μ−) alongside earlier determinations of RD(⁎) and BR(Bc→τν). We provide analytic constraints …
View article: Information theory unification of epidemiological and population dynamics
Information theory unification of epidemiological and population dynamics Open
International audience
View article: Scaling results for charged sectors of near conformal QCD
Scaling results for charged sectors of near conformal QCD Open
We provide the leading near conformal corrections on a cylinder to the scaling dimension of the lowest-lying fixed isospin charge Q operators defined at the lower boundary of the quantum chromodynamics conformal window, Δ˜Q=Δ˜Q*+(mσ4πν)2QΔ…
View article: Defect Induced Heavy Meson Dynamics in the QCD Conformal Window
Defect Induced Heavy Meson Dynamics in the QCD Conformal Window Open
Upon introducing an heavy quark in the perturbative regime of the QCD conformal window we precisely determine the associated heavy meson spectrum and wave functions in terms of the number of light flavours and mass. We then compute the con…
View article: Looking for Black Hole Morsels in Astrophysical Mergers via Hawking Radiation
Looking for Black Hole Morsels in Astrophysical Mergers via Hawking Radiation Open
Gravitational wave observation has provided numerous insights into the merger of astrophysical black holes. In contrast to other violent events (e.g. supernovae), they are, however, not expected to lead to significant emissions of photons …