A5034939209- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Cosmology and Gravitation Theories
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Quantum Chromodynamics and Particle Interactions
- Astro and Planetary Science
- Climate variability and models
- Molecular Spectroscopy and Structure
- Particle Detector Development and Performance
- Stellar, planetary, and galactic studies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Atmospheric Ozone and Climate
- Geomagnetism and Paleomagnetism Studies
- Particle Accelerators and Free-Electron Lasers
- Soil Moisture and Remote Sensing
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- International Science and Diplomacy
Universidad Autónoma de Madrid
2015-2024
Instituto de Física Teórica
2022-2024
National Research Council
2011-2021
Consejo Superior de Investigaciones Científicas
2003-2018
Max Planck Institute for Nuclear Physics
2014
Universidade de São Paulo
2014
Rutherford Appleton Laboratory
2013
The Abdus Salam International Centre for Theoretical Physics (ICTP)
2006-2007
International Centre for Theoretical Sciences
2007
Stony Brook University
2003-2005
A bstract Our herein described combined analysis of the latest neutrino oscillation data presented at Neutrino2020 conference shows that previous hints for mass ordering have significantly decreased, and normal (NO) is favored only 1 . 6 σ level. Combined with χ 2 map provided by Super-Kamiokande their atmospheric hint NO 7 The CP conserving value δ = 180° within 0 global best fit point. Only if we restrict to inverted ordering, violation ∼ 3 We discuss origin these results — which are...
A bstract We present the results of a global analysis neutrino oscillation data available as fall 2018 in framework three massive mixed neutrinos with goal at determining ranges allowed values for six relevant parameters. describe complementarity and quantify tensions among different samples contributing to determination each parameter. also show how those vary when combining our likelihood χ 2 map provided by Super-Kamiokande their atmospheric same framework. The best fit is normal mass...
We perform a combined fit to global neutrino oscillation data available as of fall 2016 in the scenario three-neutrino oscillations and present updated allowed ranges six parameters. discuss differences arising between consistent combination samples from accelerator reactor experiments compared partial combinations. quantify confidence determination less precisely known parameters $\theta_{23}$, $\delta_\text{CP}$, mass ordering by performing Monte Carlo study long baseline data. find that...
We review the present status of global analyses neutrino oscillations, taking into account most recent data including latest KamLAND and K2K updates presented at Neutrino2004, as well state-of-the-art solar atmospheric flux calculations. give two-neutrino + results, oscillation regions, discussing in each case robustness interpretation against departures from Standard Solar Model possible existence non-standard physics. Furthermore, we best fit values allowed ranges three-flavour parameters...
We present a global analysis of solar, atmospheric, reactor and accelerator neutrino data in the framework three-neutrino oscillations based on available summer 2014. provide allowed ranges six oscillation parameters show that their determination is stable with respect to uncertainties related solar flux predictions. find maximal possible value Jarlskog invariant lepton sector $0.0329 \pm 0.0009$ ($\pm 0.0027$) at $1\sigma$ ($3\sigma$) level we use leptonic unitarity triangles illustrate...
This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and latest astrophysical data.
A bstract Neutrino oscillations involving eV-scale neutrino mass states are investigated in the context of global oscillation data including short and long-baseline accelerator, reactor, radioactive source experiments, as well atmospheric solar neutrinos. We consider sterile schemes one or two mass-squared differences at eV 2 scale denoted by 3+1, 3+2, 1+3+1. discuss hints for neutrinos from $ \mathop{{{v_e}}}\limits^{{\left( - \right)}} disappearance (reactor Gallium anomalies)...
We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, particle physics in each case viewed both theoretical experimental/observational perspectives. After reviewing the role active neutrinos physics, we focus on context Matter puzzle. Here, first motivation for based challenges tensions purely cold scenarios. then round out discussion by critically summarizing known...
New predictions for the anti-neutrino flux emitted by nuclear reactors suggest that reactor experiments may have measured a deficit in flux, which can be interpreted terms of oscillations between known active neutrinos and new sterile states. Motivated this observation, we perform re-analysis global short-baseline neutrino oscillation data framework with one or two neutrinos. While is still not sufficient to reconcile signals suggested LSND MiniBooNE null results from other searches, find...
A bstract We discuss the possibility to explain anomalies in short-baseline neutrino oscillation experiments terms of sterile neutrinos. work a 3 + 1 framework and pay special attention recent new data from reactor experiments, IceCube MINOS+. find that results DANSS NEOS support explanation anomaly, based on an analysis relies solely relative comparison measured spectra. Global ν e disappearance channel favour oscillations at σ level with Δ m 41 2 ≈ 1.3 eV | U 4 0 . 1, even without any...
We summarize the determination of some neutrino properties from global analysis solar, atmospheric, reactor, and accelerator data in framework three-neutrino mixing as well extended scenarios such with eV-scale sterile neutrinos invoked for interpretation short baseline anomalies, presence non-standard interactions.
We quantify our present knowledge of the size and flavor structure non-standard neutrino interactions which affect matter background in evolution solar, atmospheric, reactor long-baseline accelerator neutrinos as determined by a global analysis oscillation data - both alone combination with results on coherent neutrino-nucleus scattering from COHERENT experiment. consider general neutral current quarks whose lepton-flavor is independent quark type. study dependence allowed ranges interaction...
Abstract Neutrinos are one of the most promising messengers for signals new physics Beyond Standard Model (BSM). On theoretical side, their elusive nature, combined with unknown mass mechanism, seems to indicate that neutrino sector is indeed opening a window physics. experimental several long-standing anomalies have been reported in past decades, providing strong motivation thoroughly test standard three-neutrino oscillation paradigm. In this Snowmass21 white paper, we explore potential...
The conclusions of the Physics Working Group international scoping study a future Neutrino Factory and super-beam facility (the ISS) are presented. ISS was carried by community between NuFact05, 7th International Workshop on Factories Superbeams, Laboratori Nazionali di Frascati, Rome, June 21-26, 2005) NuFact06 (Ivine, California, 24{30 August 2006). physics case for an extensive experimental programme to understand properties neutrino is presented role high-precision measurements...
In view of the recent results from MiniBooNE experiment we revisit global neutrino oscillation fit to short-baseline data by adding one or two sterile neutrinos with eV-scale masses three standard model neutrinos, and for first time consider also neutrinos. Four-neutrino oscillations ($3+1$) type have been only marginally allowed before results, become even more disfavored new (at level $4\ensuremath{\sigma}$). framework so-called ($3+2$) five-neutrino mass schemes find severe tension...
We study the robustness of determination neutrino masses and mixing from analysis atmospheric K2K data under presence different forms phenomenologically allowed new physics in ${\ensuremath{\nu}}_{\ensuremath{\mu}}--{\ensuremath{\nu}}_{\ensuremath{\tau}}$ sector. focus on vector tensor-like interactions which allow us to treat, a model independent way, effects due violation equivalence principle, violations Lorentz invariance both CPT conserving violating, non-universal couplings torsion...
We compute a new generation of standard solar models (SSMs) that includes recent updates on some important nuclear reaction rates and more consistent treatment the equation state. Models also include novel flexible opacity uncertainties based kernels, required in light theoretical experimental works radiative opacity. Two large sets SSMs, each different canonical set abundances with high low metallicity (Z), are computed to determine model correlations among observables. present detailed...
In the presence of nonstandard neutrino interactions (NSI), oscillation data are affected by a degeneracy which allows solar mixing angle to be in second octant (also known as dark side) and implies sign flip atmospheric mass-squared difference. This leads an ambiguity determination ordering masses, one main goals current future experimental program. We show that recent observation coherent neutrino-nucleus scattering COHERENT experiment, combination with global data, excludes NSI at...
We present an update of the determination solar neutrino fluxes from a global analysis and terrestrial data in framework three-neutrino mixing. Using Bayesian we reconstruct posterior probability distribution function for eight normalization parameters plus relevant masses mixing, with without imposing luminosity constraint. then use these results to compare description provided by different Standard Solar Models. Our show that, at present, both models low high metallicity can describe...
A bstract The ∼ 3 σ discrepancy between the predicted and observed reactor anti-neutrino flux, known as anomaly, continues to intrigue. recent discovery of an unexpected bump in spectrum, well indications that flux deficit is different for fission isotopes seems disfavour explanation anomaly terms sterile neutrino oscillations. We critically review this conclusion view all available data on electron (anti)neutrino disappearance. find hypothesis cannot be rejected based global only mildly...
In this contribution, we summarise the determination of neutrino masses and mixing arising from global analysis data atmospheric, solar, reactor, accelerator experiments performed in framework three-neutrino obtained context NuFIT collaboration. Apart presenting latest status as autumn 2021, discuss evolution global-fit results over last 10 years, mention various pending issues (and their resolution) that occurred during period analyses.
We perform a global fit to neutrino oscillation and coherent neutrino-nucleus scattering data, using both timing energy information from the COHERENT experiment. The results are used set model-independent bounds on four-fermion effective operators inducing non-standard neutral-current interactions. quantify allowed ranges for their Wilson coefficients, as well status of LMA-D solution, wide class new physics models with arbitrary ratios between strength involving up down quarks. Our...