A5038282130- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Ionosphere and magnetosphere dynamics
- Nuclear Physics and Applications
- advanced mathematical theories
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Distributed and Parallel Computing Systems
- Earthquake Detection and Analysis
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Genetically Modified Organisms Research
- Astro and Planetary Science
- Particle Accelerators and Free-Electron Lasers
Universidade Federal Fluminense
2011-2024
Universidade Federal do Rio de Janeiro
2009-2020
Federal University of São João del-Rei
2014-2018
The University of Adelaide
2013-2017
Prefeitura Municipal de Rio das Ostras
2017
LIP - Laboratory of Instrumentation and Experimental Particle Physics
2016
Universidad de Granada
2016
University of Liverpool
2015
Aix-Marseille Université
2014-2015
Universidade de São Paulo
2010-2015
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
The Large Hadron Collider will restart with higher energy and luminosity in 2015. This achievement opens the possibility of discovering new phenomena hardly described by Standard Model, which is based on following two neutral gauge bosons: photon $Z$. perspective imposes a deep systematic study models that predicts existence bosons. One such model group $SU(3{)}_{C}\ifmmode\times\else\texttimes\fi{}SU(3{)}_{L}\ifmmode\times\else\texttimes\fi{}U(1{)}_{N}$, called 3-3-1 for short. In this...
Abstract The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with a sensitivity improvement of three orders magnitude compared last such search. This paper describes progress towards conceptual design report NNBAR. moderator, neutron reflector, beamline, shielding and annihilation detector is reported. simulations used form part model which be optimisation quantification its sensitivity.
A key aim of the HighNESS project for European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report NNBAR experiment. would exploit new cold lower moderator make first search in over thirty years free neutrons converting anti-neutrons. The observation such baryon-number-violating signature be fundamental significance and tackle open questions modern physics, including origin matter-antimatter asymmetry. shows beamline,...
In this paper we investigate the LHC potential for discovering doubly-charged vector bileptons considering measurable process $p,p$ $\rightarrow$ $e^{\mp}e^{\mp}\mu^{\pm}\mu^{\pm} X$. We perform study using four different bilepton masses and three exotics quark masses. Minimal integrated luminosities needed setting limits on are obtained both 7 TeV 14 center-of-mass energies. find that these spectacular signatures can be observed at in next years up to a mass of order 1 TeV.
On 2017 September 10 Neutron Monitors (NMs) apparatus located at ground level and high latitudes detected an increase in the counting rate associated to solar energetic particles (SEPs) emission from X8.2-class flare its CME. This was second-highest of current cycle. The origin active region AR 12673 when it edge west disk, magnetically poorly connected with Earth. However, there a peculiar condition: protons accelerated by CME shocks were injected within heliospheric sheet (HCS) Earth...
The goal of the HIBEAM/NNBAR program is to search for baryon number violation via conversion or oscillation neutrons into sterile and/or antineutrons at European Spallation Source. A key experimental component construction an annihilation detector directly observe production antineutron following oscillation. Design studies are presented. predicted response models studied using Geant4 simulations made with Monte Carlo signal topology and cosmic ray backgrounds. Particle identification...
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
In this paper, limits are set on bileptons masses and couplings in the context of 331 Model, as well generic, non-331 Models predicting bileptons. The following measurable processes studied: $pp \rightarrow \ell^{+}\ell^{+}\ell^{-}\ell^{-}X$, \ell^{+}\ell^{-} \nu X$ X$. Experimental singly-charged within also obtained for first time. With results, an over 20 year-old experimental limit vector is increased by 60\%. computed now most stringent ones these particles.
The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source focusing on searches for baryon number violation via processes in which neutrons convert to antineutrons. This paper outlines computing and detector simulation framework program. based predictions of neutron flux neutronics together with signal background generation. A range diverse packages are incorporated, including Monte Carlo transport codes, ray-tracing packages, software. common package these...
The NNBAR experiment for the European Spallation Source will search free neutrons converting to antineutrons with an expected sensitivity improvement of three orders magnitude compared last such search. This paper describes both simulations a key component experiment, neutron optical reflector and gains in sensitivity.
The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world's most powerful pulsed neutron source. Supported by 3 million Euro Research and Innovation Action within EU Horizon 2020 program, design study (HighNESS) has been develop second source located below spallation target. Compared first source, designed for high cold thermal brightness, new optimized...
Far away from any sunspot, a bright flare erupted on November 1st, 2014, with onset at 4:44 UT and duration of around three hours, causing C2.7-class flare. The blast was associated the sudden disappearance large dark solar filament. rest filament flew out into space, forming core massive CME. Despite location explosion over sun's southeastern region (near eastern edge sun) not be geoeffective, radiation storm, that is, energetic particles (SEP) started to reach Earth 14:00 UT, reaching...
Torsion models constitute a well-known class of extended quantum gravity models. In this paper we study some phenomenological consequences torsion field interacting with fermions at LHC. A could appear as new heavy state characterized by its mass and couplings to fermions. These states will form resonance decaying into difermions, occurs in many extensions the standard model, such predicting existence additional neutral gauge bosons, usually named ${Z}^{\ensuremath{'}}$. Using dielectron...
In this paper we examine the possibility of ground observation gigaelectronvolt counterparts associated with Monitor All-sky X-ray Image transient event (trigger 58072727) and Swift GRB140512A event. both cases, there was a muon excess statistical significance above 4σ. The coordinates events were located in field view (FOV) Tupi telescopes at time occurrence. Since 2013 August, experiment has been operating new extended array five telescopes, level (, 3 m sea level). This location coincides...
On Oct. 29th, 2015, the Earth crossed through a fold in heliospheric current sheet. This is called "solar sector boundary crossing". Under this circumstances, large coronal mass ejection (CME) occurred at 2:24 UT, behind west limb on sun. Therefore, crossing when blast's nearby environment was filled with energetic particles accelerated by CME shock waves, spacecraft measurements (ACE and GOES) have shown that such case, protons energies least up to 30 MeV were stored within range of...
We show evidence of particle acceleration at GEV energies associated directly with protons from the prompt emission a long-duration M6-class solar flare on July 17, 2023, rather than by shocks its Coronal Mass Ejection (CME), which erupted speed 1342 km/s. Solar Energetic Particles (SEP) accelerated blast have reached Earth, up to an almost S3 (strong) category radiation storm NOAA scale. Also, we temporal correlation between fast rising GOES-16 proton and muon excess ground level in count...
We analyze a bright and rare burst, GRB20221009A, showing through NED data that the angular distance between GRB221009A supernova SN 2022xiw is almost same separation with galactic objects, i.e., SN-GRB connection at z = 0.151 not robust. Gamma rays up to 18 TeV detected in association GRB constrain attenuation which they are subject cosmological distances. GR221009A out of scale relative other long-lasting GRBs comes from region an excess soft gamma repeaters (SGR), suggesting giant SGR,...