André de Gouvêa
A5010052870- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Atomic and Subatomic Physics Research
- Noncommutative and Quantum Gravity Theories
- Nuclear Physics and Applications
- Scientific Research and Discoveries
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- International Science and Diplomacy
- High-Energy Particle Collisions Research
- Graphite, nuclear technology, radiation studies
- Distributed and Parallel Computing Systems
- Quantum and Classical Electrodynamics
- Climate Change Communication and Perception
- Fractal and DNA sequence analysis
- Nuclear reactor physics and engineering
Northwestern University
2015-2024
Fermi National Accelerator Laboratory
2002-2020
European Organization for Nuclear Research
2000-2003
Astronomy and Space
2002
California Institute of Technology
2002
University of California, Berkeley
1997-2001
Lawrence Berkeley National Laboratory
1998-2001
Pontifical Catholic University of Rio de Janeiro
1995
The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,062 new measurements 721 papers, we list, evaluate, average measured properties gauge bosons the recently discovered Higgs boson, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. All search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews...
This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements 644 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the search limits are listed in Summary Tables. also give numerous tables, figures, formulae, reviews topics Standard Model, detectors, probability,...
This white paper addresses the hypothesis of light sterile neutrinos based on recent anomalies observed in neutrino experiments and latest astrophysical data.
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
Abstract A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of energy frontier. Offering combination unprecedented collisions comparatively clean leptonic environment, high has unique potential to provide both precision measurements and highest reach one machine that cannot be paralleled by any currently available technology. The topic generated lot excitement Snowmass meetings continues attract large number supporters, including many from early career...
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...
We study the cosmology of supersymmetric models in which supersymmetry-breaking effects are mediated by gauge interactions at about ${10}^{5}$ GeV scale. first point out that gravitino is likely to overclose Universe this class models. This requires an entropy production, prefers a baryogenesis mechanism relatively low temperature. The Affleck-Dine for one possibilities generate enough baryon asymmetry, but analysis nontrivial since shape potential flat direction differs substantially from...
The Proceedings of the 2011 workshop on Fundamental Physics at Intensity Frontier. Science opportunities intensity frontier are identified and described in areas heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, nucleons, nuclei, atoms.
We survey 129 lepton number violating effective operators, consistent with the minimal standard model gauge group and particle content, of mass dimension up to including 11. Upon requiring that each one radiatively generates observed neutrino masses, we extract an associated characteristic cutoff energy scale which use calculate other observable manifestations these operators for a current future experimental probes, concentrating on phenomena. These include searches neutrinoless double-beta...
We estimate constraints on the existence of a heavy, mostly sterile neutrino with mass between 10 eV and 1 TeV. improve upon previous analyses by performing global combination expanding experimental inputs to simultaneously include tests for lepton universality, lepton-flavor-violating processes, electroweak precision data, dipole moments, neutrinoless double beta decay. Assuming heavy its decay products are invisible detection, we further include, in self-consistent manner, from direct...
We explore the effects of non-standard neutrino interactions (NSI) and how they modify propagation in Deep Underground Neutrino Experiment (DUNE). find that NSI can significantly data to be collected by DUNE experiment as long new physics parameters are large enough. For example, if consistent with standard three-massive-neutrinos paradigm, order 0.1 (in units Fermi constant) will ruled out. On other hand, present, able not only rule out paradigm but also measure parameters, sometimes good...
One proposed component of the upcoming Deep Underground Neutrino Experiment (DUNE) near detector complex is a multi-purpose, magnetized, gaseous argon time projection chamber: Multi-Purpose Detector (MPD). We explore new-physics potential MPD, focusing on scenarios in which MPD significantly more sensitive to new physics than liquid detector, specifically searches for semi-long-lived particles that are produced in/near beam target and decay MPD. The specific possibilities studied dark vector...
This report summarizes the present status of neutrino non-standard interactions (NSI). After a brief overview, several aspects NSIs are discussed, including connection to mass models, model-building and phenomenology large NSI with both light heavy mediators, in short- long-baseline oscillation experiments, cross-sections, complementarity other low- high-energy fits scattering data, DUNE sensitivity NSI, effective field theory as well relevance dark matter cosmology. We also discuss open...
keV-scale gauge-singlet fermions, when allowed to mix with the active neutrinos, are elegant dark matter (DM) candidates. They produced in early Universe via Dodelson-Widrow mechanism and can be detected as they decay very slowly, emitting x-rays. In absence of new physics, this hypothesis is virtually ruled out by astrophysical observations. Here, we show that interactions among neutrinos allow these sterile make up all DM while safely evading current experimental bounds. The existence...
With the advent of a new generation neutrino experiments which leverage high-intensity beams for precision measurements, it is timely to explore physics topics beyond standard neutrino-related physics. Given that realm model (BSM) has been mostly sought at high-energy regimes colliders, such as LHC CERN, exploration BSM in will enable complementary measurements energy balance LHC. This concert with ideas fixed target and beam-dump world-wide, e.g., those CERN. The combination high intensity...
We hunt for and discuss manifestly CP-violating effects which are mediated by Majorana phases. These phases present if the standard model neutrinos particles. argue that while do affect strength of neutrinoless double beta decay (a well known fact), they so in a way involves no manifest violation CP. The conditions phenomena---differences between rates CP-mirror-image processes---are presented, three examples discussed: (i) neutrino $\ensuremath{\leftrightarrow}$ antineutrino oscillation;...
The most general, renormalizable Lagrangian that includes massive neutrinos contains ``right-handed neutrino'' Majorana masses of order M. While there are prejudices in favor M much larger than the weak scale, virtually nothing is known about magnitude I argue LSND anomaly provides, currently, only experimental hint: around 1 eV. If this case, mixing angles functions active neutrino and and, remarkably, adequate fits to all data can be naturally obtained. also discuss consequences...
We investigate the potential for Deep Underground Neutrino Experiment (DUNE) to probe existence and effects of a fourth neutrino mass eigenstate. study mixing eigenstate with three active neutrinos Standard Model, including new sources $CP$-invariance violation, wide range mass-squared differences, from lower than ${10}^{\ensuremath{-}5}\text{ }\text{ }{\mathrm{eV}}^{2}$ higher $1\text{ }{\mathrm{eV}}^{2}$. DUNE is sensitive previously unexplored regions angle--mass-squared difference...
Experimentally, baryon number minus lepton number, $B\ensuremath{-}L$, appears to be a good global symmetry of nature. We explore the consequences existence gauge-singlet scalar fields charged under $B\ensuremath{-}L$--dubbed lepton-number-charged scalars (LeNCSs)---and postulate that these couple standard model degrees freedom in such way $B\ensuremath{-}L$ is conserved even at nonrenormalizable level. In this framework, neutrinos are Dirac fermions. Including only lowest mass-dimension...
The discovery of nonzero neutrino masses is among the most important particle physics results last two decades: It indicates that Standard Model incomplete. After 20 years intense experimental and theoretical research, we still do not know leads to masses. purpose this review discuss different models for In doing so, I describe differences between models, how they connect other aspects physics, whether or one can hope establish which model—if any—is a faithful description nature.
The Majorana versus Dirac nature of neutrinos remains an open question. This is due, in part, to the fact that virtually all experimentally accessible are ultra-relativistic. Noting can behave quite differently from ones when they non-relativistic, we show that, at leading order, angular distribution daughters decay a heavy neutrino into lighter one and self-conjugate boson isotropic parent's rest frame if fermions, independent polarization. result follows CPT invariance details physics...
The preponderance of matter over antimatter in the early Universe, dynamics supernova bursts that produced heavy elements necessary for life and whether protons eventually decay --- these mysteries at forefront particle physics astrophysics are key to understanding evolution our its current state eventual fate. Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed plan a world-class experiment dedicated addressing questions. LBNE is conceived around three central...