662 citations · 4.2k across the 84 of their papers we have counts for
24 papers · 1 filter
Probing the neutrino chemical potential with cosmological observations
Pietro Ghedini, Riccardo Impavido, Stefano Gariazzo +2
The electron neutrino degeneracy parameter, , is tightly constrained by Big Bang Nucleosynthesis (BBN), while the degeneracy parameters of…
Impact of non-standard neutrino-electron interactions on Big Bang Nucleosynthesis
Julien Froustey, Stefano Gariazzo, Jaume Moncho +2
Neutrino non-standard interactions (NSI) with electrons, predicted in many extended theoretical models of particle physics, are known to alter the picture of neutrino decoupling fr…
Early-universe constraints on the electron mass
Michela Garramone, Stefano Gariazzo, Nicolao Fornengo
We investigate the impact of a nonstandard electron mass on early-Universe thermal history, focusing on neutrino decoupling and Big Bang Nucleosynthesis (BBN). In the standar…
Big Bang Nucleosynthesis as a probe of non-standard neutrino interactions and non-unitary three-neutrino mixing
Gabriela Barenboim, Stefano Gariazzo, Alberto Sánchez-Vargas
In this work we investigate the impact of two phenomenological Beyond the Standard Model (BSM) scenarios concerning the role of neutrinos in the early universe: non-standard neutri…
Quantifying the tension between cosmological and terrestrial constraints on neutrino masses
Stefano Gariazzo, Olga Mena, Thomas Schwetz
The sensitivity of cosmology to the total neutrino mass scale is approaching the minimal values required by oscillation data. We study quantitatively possible tensions betwe…
Non-unitary three-neutrino mixing in the early Universe
Stefano Gariazzo, Pablo Martínez-Miravé, Olga Mena +2
Deviations from unitarity in the three-neutrino mixing canonical picture are expected in many physics scenarios beyond the Standard Model. The mixing of new heavy neutral leptons w…
Neutrino mass and mass ordering: No conclusive evidence for normal ordering
Stefano Gariazzo, Martina Gerbino, Thejs Brinckmann +8
The extraction of the neutrino mass ordering is one of the major challenges in particle physics and cosmology, not only for its implications for a fundamental theory of mass genera…
Heisenberg's uncertainty principle in the PTOLEMY project: a theory update
PTOLEMY Collaboration, A. Apponi, M. G. Betti +58
We discuss the consequences of the quantum uncertainty on the spectrum of the electron emitted by the -processes of a tritium atom bound to a graphene sheet. We analyze quantita…
Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives
Maria Archidiacono, Stefano Gariazzo
The presence of light sterile neutrinos is one of the unanswered questions of particle physics. The cosmological counterpart is represented by dark radiation, i.e.\ any form of rad…
Light Sterile Neutrinos
Stefano Gariazzo
We review the status of light sterile neutrino searches, motivated by the original Short BaseLine (SBL) anomalies. Here, we discuss how sterile neutrino properties can be constrain…
Cosmological radiation density with non-standard neutrino-electron interactions
Pablo Martínez-Miravé
Non-standard interactions (NSI) between neutrinos and electrons can significantly modify the decoupling of neutrinos from the plasma. These interactions have two effects on the ove…
Cosmological radiation density with non-standard neutrino-electron interactions
Pablo F. de Salas, Stefano Gariazzo, Pablo Martínez-Miravé +2
Neutrino non-standard interactions (NSI) with electrons are known to alter the picture of neutrino decoupling from the cosmic plasma. NSI modify both flavour oscillations through m…
Towards a precision calculation of in the Standard Model II: Neutrino decoupling in the presence of flavour oscillations and finite-temperature QED
Jack J. Bennett, Gilles Buldgen, Pablo F. de Salas +4
We present in this work a new calculation of the standard-model benchmark value for the effective number of neutrinos, , that quantifies the cosmological neut…
2020 Global reassessment of the neutrino oscillation picture
P. F. de Salas, D. V. Forero, S. Gariazzo +5
We present an updated global fit of neutrino oscillation data in the simplest three-neutrino framework. In the present study we include up-to-date analyses from a number of experim…
Light sterile neutrinos: the current picture from neutrino oscillations
S. Gariazzo
Light sterile neutrinos with a mass around 1 eV have been studied for many years as a possible explanation of the so called short-baseline neutrino oscillation anomalies. Recently,…
Light sterile neutrinos: oscillations and cosmology
S. Gariazzo
Light sterile neutrinos with a mass around 1 eV have been studied for many years as a possible explanation of the so called short-baseline neutrino oscillation anomalies. Recently,…
Neutrino Mass Ordering at DUNE: an Extra -Bonus
Christoph A. Ternes, Stefano Gariazzo, Rasmi Hajjar +3
We study the possibility of extracting the neutrino mass ordering at the future Deep Underground Neutrino Experiment using atmospheric neutrinos, which will be available before the…
Neutrino mass eigenstates and their ordering: a Bayesian approach
S. Gariazzo
One of the not-yet determined properties of neutrinos is the ordering of their mass eigenstates. We combine the available data from neutrino oscillations, neutrinoless double beta…
Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
P. F. de Salas, S. Gariazzo, O. Mena +2
The ordering of the neutrino masses is a crucial input for a deep understanding of flavor physics, and its determination may provide the key to establish the relationship among the…
Neutrino masses and their ordering: Global Data, Priors and Models
S. Gariazzo, M. Archidiacono, P. F. de Salas +3
We present a Bayesian analysis of the combination of current neutrino oscillation, neutrinoless double beta decay and CMB observations. Our major goal is to carefully investigate t…
Model-Independent Short-Baseline Oscillations from Reactor Spectral Ratios
S. Gariazzo, C. Giunti, M. Laveder +1
We consider the ratio of the spectra measured in the DANSS neutrino experiment at 12.7 and 10.7~m from a nuclear reactor. These data give a new model-independent indication in favo…
Updated Global 3+1 Analysis of Short-BaseLine Neutrino Oscillations
S. Gariazzo, C. Giunti, M. Laveder +1
We present the results of an updated fit of short-baseline neutrino oscillation data in the framework of 3+1 active-sterile neutrino mixing. We first consider and d…
Light sterile neutrinos
S. Gariazzo, C. Giunti, M. Laveder +2
The theory and phenomenology of light sterile neutrinos at the eV mass scale is reviewed. The reactor, Gallium and LSND anomalies are briefly described and interpreted as indicatio…
Light Sterile Neutrinos in Cosmology and Short-Baseline Oscillation Experiments
S. Gariazzo, C. Giunti, M. Laveder
We analyze the most recent cosmological data, including Planck, taking into account the possible existence of a sterile neutrino with a mass at the eV scale indicated by short-base…