A. Schneider
A5106631514- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Radio Astronomy Observations and Technology
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Radiation Detection and Scintillator Technologies
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Radio Wave Propagation Studies
- Stellar, planetary, and galactic studies
- Gyrotron and Vacuum Electronics Research
- Laser-Matter Interactions and Applications
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Statistical Methods and Bayesian Inference
- Particle accelerators and beam dynamics
- Quantum, superfluid, helium dynamics
- Computational Physics and Python Applications
- Spectroscopy and Quantum Chemical Studies
- Scientific Research and Discoveries
- Cardiac Imaging and Diagnostics
Massachusetts Institute of Technology
2003-2025
Forschungszentrum Jülich
2001-2025
Los Alamos National Laboratory
2023-2024
Los Alamos Medical Center
2024
University of Wisconsin–Madison
2008-2023
Vrije Universiteit Brussel
2022
Providence College
2008-2021
Southern University and Agricultural and Mechanical College
2018-2021
Chiba University
2019-2021
The University of Texas at Arlington
2018-2021
We have remotely mapped optical scattering and absorption in glacial ice at the South Pole for wavelengths between 313 560 nm depths 1100 2350 m. used pulsed continuous light sources embedded with AMANDA neutrino telescope, an array of more than six hundred photomultiplier tubes buried deep ice. At greater 1300 m, both coefficient absorptivity follow vertical variations concentration dust impurities, which are seen cores from other Antarctic sites track climatological changes. The varies by...
We devised a new calibration procedure [least squares method (LSQ)] for respiratory inductive plethysmography (RIP) and compared it with our previously reported simultaneous equation (SEQ) of analyzing data in 2 body positions the Stagg associates using analysis individual breaths single position. The values from RIP were spirometry (SP) 20 normal subjects placed standing (STD), supine (SUP), sitting, prone, semi-recumbent, right lateral decubitus, left decubitus postures. LSQ gave most...
The First G-APD Cherenkov Telescope (FACT) is designed to detect cosmic gamma-rays with energies from several hundred GeV up about 10 TeV using the Imaging Atmospheric Technique. In contrast former or existing telescopes, camera of FACT telescope comprised solid-state Geiger-mode Avalanche Photodiodes (G-APD) instead photomultiplier tubes for photo detection. It first full-scale device its kind employing this new technology. operated at Observatorio del Roque de los Muchachos (La Palma,...
The MiniBooNE experiment at Fermilab reports a total excess of $638.0\ifmmode\pm\else\textpm\fi{}52.1(\mathrm{stat}.)\ifmmode\pm\else\textpm\fi{}122.2(\mathrm{syst}.)$ electronlike events from data sample corresponding to $18.75\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons-on-target in neutrino mode, which is 46% increase the with respect previously published results and $11.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ antineutrino mode. overall significance excess,...
Linear-accelerator-based sources will revolutionize ultrafast x-ray science due to their unprecedented brightness and short pulse duration. However, time-resolved studies at the resolution of duration are hampered by inability precisely synchronize an external laser accelerator. At Sub-Picosecond Pulse Source Stanford Linear-Accelerator Center we solved this problem measuring arrival time each high energy electron bunch with electro-optic sampling. This measurement indirectly determined...
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 propose and analyze a scheme for ultrafast spectroscopy with nanometer spatial femtosecond temporal resolution. The interaction of polarization-shaped laser pulses nanostructure allows us to control the evolution optical near field. Employing learning algorithm, field is tailored such that pump probe excitation occur at different positions times. Both excitations can be restricted subdiffraction extensions are separable on length scale. This enables direct probing nanoscale energy...
The IceCube neutrino observatory has established the existence of an astrophysical diffuse component above $\sim100$ TeV. This discovery was made using high-energy starting event sample, which uses outer layer instrumented volume as a veto to significantly reduce atmospheric background. We present latest flux measurement events. iteration analysis extends sample by $1.5$ years for total $7.5$, updates properties with newer models light transport in glacial ice, and improved systematic...
A bstract Metrics of model goodness-of-fit, comparison, and parameter estimation are the main categories statistical problems in science. Bayesian frequentist methods that address these questions often rely on a likelihood function, which is key ingredient order to assess plausibility parameters given observed data. In some complex systems or experimental setups, predicting outcome cannot be done analytically, Monte Carlo techniques used. this paper, we present new analytic takes into...
Potential energy curves and matrix elements of radial non-adiabatic couplings 2{\Sigma}+ 2{\Pi} states the NeH molecule are calculated using electronic structure package MOLPRO, in view study reactive collisions between low-energy electrons NeH+.
O artigo analisou o perfil epidemiológico do traumatismo cranioencefálico (TCE) no Brasil entre 2014 e 2023, utilizando dados Sistema de Informações Hospitalares SUS (SIH/SUS). A metodologia foi descritiva quantitativa, baseada na análise secundários sobre incidência, distribuição geográfica, sociodemográfico, taxas mortalidade impacto econômico das internações por TCE. Os resultados mostraram alta prevalência casos em homens jovens, com maior concentração nas regiões Sudeste Nordeste. As...
In Aguilar-Arevalo [], we explored various effective field theories that could explain the MiniBooNE excess involving long-lived particles produced from charged meson decays and sensitivity of Coherent CAPTAIN Mills experiment to these models. this addendum, extend analysis project upcoming MicroBooNE data particle models considered in previous work. We find a dedicated single photon final state with longer exposure improved signal efficiency will be sensitive new physics explanations...
The Antarctic muon and neutrino detector array (AMANDA) began collecting data with ten strings in 1997. Results from the first year of operation are presented. Neutrinos coming through Earth Northern Hemisphere identified by secondary muons moving upward array. Cosmic rays atmosphere generate a background downward muons, which about ${10}^{6}$ times more abundant than muons. Over 130 days exposure, we observed total 300 events. In same period, $1.05\ifmmode\times\else\texttimes\fi{}{10}^{9}$...
We present the results of a search for point sources high-energy neutrinos in northern hemisphere using AMANDA-II data collected year 2000. Included are flux limits on several active-galactic-nuclei blazars, microquasars, magnetars, and other candidate neutrino sources. A excesses above random background cosmic-ray-induced atmospheric misreconstructed downgoing cosmic-ray muons reveals no statistically significant show that has achieved sensitivity required to probe known TeV gamma-ray such...
This Letter presents the results from MiniBooNE experiment within a full "3+1" scenario where one sterile neutrino is introduced to three-active-neutrino picture. In addition electron-neutrino appearance at short baselines, this also allows for disappearance of muon-neutrino and fluxes in Booster Neutrino Beam, which shared by MicroBooNE experiment. We present 3+1 fit electron-(anti)neutrino muon-(anti)neutrino data alone combination with data. The best-fit parameters combined exclusive...
We revisit models of heavy neutral leptons (neutrissimos) with transition magnetic moments as explanations the $4.8\ensuremath{\sigma}$ excess electronlike events at MiniBooNE. first reexamine preferred regions in model parameter space to explain MiniBooNE, considering also potential contributions from oscillations due an eV-scale sterile neutrino. then derive constraints on using neutrino-electron elastic scattering data MINERvA. To carry out these analyses, we have developed a detailed...
Data from the AMANDA-B10 detector taken during austral winter of 1997 have been searched for a diffuse flux high energy extraterrestrial muon neutrinos. This search yielded no excess events above those expected background atmospheric neutrinos, leading to upper limits on neutrino measured at earth. For an assumed E-2 spectrum, 90% classical confidence level limit has placed E2Phi(E)=8.4 x 10(-7) cm(-2) s(-1) sr(-1) GeV (for predominant range 6-1000 TeV), which is most restrictive bound by...
The melting dynamics of laser excited InSb have been studied with femtosecond x-ray diffraction. These measurements observe the delayed onset diffusive atomic motion, signaling appearance liquidlike dynamics. They also demonstrate that root-mean-squared displacement in [111] direction increases faster than [110] after first 500 fs. This structural anisotropy indicates initially generated fluid differs significantly from equilibrium liquid.
We show results from the Coherent CAPTAIN Mills (CCM) 2019 engineering run which begin to constrain regions of parameter space for axion-like particles (ALPs) produced in electromagnetic particle showers an 800 MeV proton beam dump, and further investigate sensitivity ongoing data-taking campaigns CCM200 upgraded detector. Based on beam-on background estimates run, we make realistic extrapolations reduction based expected shielding improvements, reduced width, analysis-based techniques...