A5089953137- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- COVID-19 epidemiological studies
- Theoretical and Computational Physics
- Atmospheric Ozone and Climate
- Stock Market Forecasting Methods
- Particle Detector Development and Performance
- COVID-19 diagnosis using AI
- Complex Systems and Time Series Analysis
- Numerical methods for differential equations
- COVID-19 Clinical Research Studies
- Noncommutative and Quantum Gravity Theories
- Particle Accelerators and Free-Electron Lasers
- Cosmology and Gravitation Theories
- Superconducting Materials and Applications
- High-Energy Particle Collisions Research
- Electromagnetic Simulation and Numerical Methods
Istituto Nazionale di Fisica Nucleare
2002-2010
Universidad de Murcia
2003-2010
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2007-2009
Instituto Superior Técnico
2007-2008
University of Salento
2007-2008
University of Milan
2001-2007
Instituto Politécnico de Lisboa
2007
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2001-2006
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
1998
University of Pisa
1998
This chapter of the report "Flavor in era LHC" Workshop discusses theoretical, phenomenological and experimental issues related to flavor phenomena charged lepton sector conserving CP-violating processes. We review current limits main theoretical models for structure fundamental particles. analyze consequences available data, setting constraints on explicit beyond standard model, presenting benchmarks discovery potential forthcoming measurements both at LHC low energy, exploring options...
The discrete flavor symmetry ${A}_{4}$ explains very well neutrino data at low energy, but it seems difficult to extend grand unified models since, in general, left-handed and right-handed fields belong different representations. Recently a model has been proposed where all the fermions equally transform under ${A}_{4}$. We study here concrete $SO(10)$ realization of such providing small masses through see-saw mechanism. fit charged fermion run up unification scale. Some properties come from...
We address two fundamental aspects of flavor physics: the mass hierarchy and large lepton mixing angles. On one side, left–right symmetry realizes democratic matrix patterns explains why family is much heavier than others. other discrete such as A4 leads to observed tribimaximal for leptons. show that, by explicitly breaking into diagonal A4, it possible explain both charged fermion hierarchies quark In particular we predict a heavy 3rd family, leptons, suggest origin Cabibbo angles quarks.
We analyze all possible extensions of the recently proposed minimal renormalizable SUSY $SU(5)$ grand unified model with inclusion an additional ${A}_{4}$ flavor symmetry. find that there are five cases but only one them is phenomenologically interesting. develop in detail such case and we show how fermion masses mixing angles come out. As a prediction obtain neutrino order 0.1 eV inverted hierarchy.
We present a common explanation of the fermion mass hierarchy and large lepton mixing angles in context grand unified flavor gauge theory (GUTF).Our starting point is (SU (3) × U (1)) F symmetry SO(10) GUT, basic ingredient our which plays major role that two different breaking pattern are at work.On one side, dynamical into (U (2) Z3) explains why family much heavier than others.On other an explicit SU discrete leads to observed tribimaximal for leptons.We write model where this group...
We discuss the limits on neutrino magnetic moment and hypothetical interactions with a hidden unparticle sector, coming from first data release of Borexino experiment. The observed spectrum in depends weakly solar model used analysis, since most signal comes monoenergetic $^{7}\mathrm{Be}$ neutrinos. This fact allows us to calibrate $\ensuremath{\nu}\ensuremath{-}e$ scattering cross section through spectral shape. In this way, we have derived limit for neutrinos Sun (in which...
We address the problem of rationalizing pattern fermion masses and mixings by adding a non-Abelian flavor symmetry in grand unified framework. With this purpose, we include an ${A}_{4}$ into renormalizable supersymmetric theory $SU(5)$ model. help ``type II seesaw'' mechanism are able to obtain observed neutrino natural way, through so-called tribimaximal matrix.
On the SL(2, ℝ) symmetry in Yang-Mills Theories Landau, Curci-Ferrari and Maximal Abelian Gauge, David Dudal, Henri Verschelde, Vitor Emanuel Rodino Lemes, Marcelo S. Sarandy, Silvio Paolo Sorella, Marco Picariello
An updated analysis of all available neutrino oscillation evidence in reactor (Kamland, first 145 days data) and solar experiments (SK day night spectra, global rates from Homestake, SAGE, GALLEX) including the SNOCC NC data is presented. In framework two active oscillations we determine allowed regions parameter space; obtain, Kamland spectral shape signal, following antineutrino best solution parameters:...
We investigate the prospects for scenarios with vanishing determinant neutrino mass matrices and $\theta_{13}$ mixing angle. Normal inverse hierarchies are considered separately. For normal hierarchy it is found that neutrinoless double beta decay cannot be observed by any of present or next generation experiments. is, on contrary, accessible to also analyse both case texture zeros equalities between matrix elements. No possible nor such equalities, apart from obvious ones.
We investigate the prediction on lepton phases in theories with a nontrivial correlation between quark (CKM) and (PMNS) mixing matrices. show that actual evidence, under only assumption matrix V M product of CKM PMNS has zero entry (1, 3), gives us for three CP-violating invariants J, S 1 2 . A better determination angles will give stronger sector. These be tested next generation experiments. To clarify how our works, we model based Grand Unified Theory permutation flavor symmetry 3 predicts...
An updated analysis of all available neutrino oscillation evidence in solar experiments (SK day and night spectra, global rates from Homestake, SAGE, GALLEX) including the latest SNO CC NC data is presented. Assuming that shape energy spectrum undistorted using information provided by we obtain, for fraction electron neutrinos remaining beam at energies \ensuremath{\gtrsim}5 MeV, ${\ensuremath{\varphi}}_{\mathrm{CC}}/{\ensuremath{\varphi}}_{\mathrm{NC}}{=0.34}_{\ensuremath{-}0.04}^{+0.05},$...
Ghost condensates of dimension two are analyzed in a class nonlinear gauges pure Yang–Mills theories. These related to the breaking SL (2, R) symmetry, present these gauges.
An updated analysis of all available neutrino oscillation evidence in Solar experiments including the latest SNO ES,CC and NC data (254d live time, NaCL enhanced efficiency) is presented. We obtain, for fraction active oscillating neutrinos: sin^2alpha=(Φ_{NC}-Φ_{CC})/(Φ_{SSM}-Φ_{CC})=0.94^{+0.0.065}_{-0.060} nearly 20σfrom pure sterile case. The neutrinos cos^2α\lsim 0.12 (1 sigma CL). At face value, these results might slightly favour existence a small sector. In framework two oscillations...
We generalize to three active flavors a previous two-flavor model for the resonant spin flavor conversion of solar neutrinos sterile ones, mechanism which is added well-known large mixing angle (LMA) one. The transition magnetic moments from muon and tau play dominant role in fixing amount suppression. also show, through numerical integration evolution equations, that data all neutrino experiments except Borexino exhibit clear preference sizable field either convection zone or core radiation...
We study in detail the ability of reactor experiment KamLAND for discriminating existing solutions to solar neutrino problem and giving accurate information on masses mixing angles. include this analysis obtained from latest SNO-NC (neutral current measurement) results other data. Assuming that expected signal corresponding various `benchmark' points two-dimensional (Δm2, tan 2θ) plane, we develop a fully fledged χ2 which includes spectrum evidence. A complete model statistical known...
The complementarity between the quark and lepton mixing matrices is shown to provide robust predictions. We obtain these predictions by first showing that matrix V M , product of (CKM) (PMNS) matrices, may have a zero (1,3) entry which favored experimental data. any theoretical model with vanishing in agreement data, solar, atmospheric angle leads [Formula: see text]. This value consistent present 90% CL upper limit. also investigate prediction on phases. show actual evidence, under only...
We present a short review of the existing evidence in favor neutrino mass and oscillations which come from different kinds experiments. focus our attention particular on solar neutrinos, presenting global updated phenomenological analysis all available data we comment possible future scenarios.