Robert Bernstein
A5002169034- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Polymer crystallization and properties
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- High voltage insulation and dielectric phenomena
- Atomic and Subatomic Physics Research
- Fiber-reinforced polymer composites
- Computational Physics and Python Applications
- Polymer Nanocomposites and Properties
- Radiation Detection and Scintillator Technologies
- Mass Spectrometry Techniques and Applications
- Concrete Corrosion and Durability
- Graphite, nuclear technology, radiation studies
- Electrical Fault Detection and Protection
- Polymer Science and PVC
- Planetary Science and Exploration
- Polymer Nanocomposite Synthesis and Irradiation
Fermi National Accelerator Laboratory
2016-2025
Memorial Hospital
2024
Cornell University
2022
Sandia National Laboratories
2005-2021
United States Air Force Research Laboratory
2020
Sandia National Laboratories California
2005-2015
Office of Scientific and Technical Information
2007-2010
National Technical Information Service
2007-2010
California Institute of Technology
2005-2006
Kansas State University
2000-2001
The NuTeV Collaboration has extracted the electroweak parameter sin(2)theta(W) from measurement of ratios neutral current to charged nu and (-)nu cross sections. Our value, sin(2)theta((on-shell))(W) = 0.2277 +/- 0.0013(stat) 0.0009(syst), is 3 standard deviations above model prediction. We also present a independent analysis same data in terms neutral-current quark couplings.
This Letter reports results from the MINOS experiment based on its initial exposure to neutrinos Fermilab NuMI beam. The rates and energy spectra of charged current ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ interactions are compared in two detectors located along beam axis at distances 1 735 km. With $1.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ 120 GeV protons incident target, 215 events with energies below 30 observed Far Detector, an expectation $336\ifmmode\pm\else\textpm\fi{}14$...
This Letter reports new results from the MINOS experiment based on a two-year exposure to muon neutrinos Fermilab NuMI beam. Our data are consistent with quantum-mechanical oscillations of neutrino flavor mass splitting |Deltam2| = (2.43+/-0.13) x 10(-3) eV2 (68% C.L.) and mixing angle sin2(2theta) > 0.90 (90% C.L.). disfavor two alternative explanations for disappearance in flight: namely, decays into lighter particles quantum decoherence neutrinos, at 3.7 5.7 standard-deviation levels,...
The NOvA experiment has made a $4.4\sigma$-significant observation of $\bar\nu_{e}$ appearance in 2 GeV $\bar\nu_{\mu}$ beam at distance 810 km. Using $12.33\times10^{20}$ protons on target delivered to the Fermilab NuMI neutrino beamline, recorded 27 $\bar\nu_{\mu} \rightarrow \bar\nu_{e}$ candidates with background 10.3 and 102 \bar\nu_{\mu}$ candidates. This new antineutrino data is combined measure oscillation parameters $|\Delta m^2_{32}| = 2.48^{+0.11}_{-0.06}\times10^{-3}$ eV$^2/c^4$,...
We report results from the first search for νμ→νe transitions by NOvA experiment. In an exposure equivalent to 2.74×1020 protons on target in upgraded NuMI beam at Fermilab, we observe 6 events Far Detector, compared a background expectation of 0.99±0.11(syst) based Near Detector measurement. A secondary analysis observes 11 with 1.07±0.14(syst). The 3.3σ excess observed primary disfavors 0.1π<δCP<0.5π inverted mass hierarchy 90% C.L.Received 19 January...
We present updated results from the NOvA experiment for $\nu_\mu\rightarrow\nu_\mu$ and $\nu_\mu\rightarrow\nu_e$ oscillations an exposure of $8.85\times10^{20}$ protons on target, which represents increase 46% compared to our previous publication. The utilize significant improvements in both simulations analysis data. A joint fit data $\nu_\mu$ disappearance $\nu_e$ appearance gives best point as normal mass hierarchy, $\Delta m^2_{32} = 2.44\times 10^{-3}{{\rm eV}^2}/c^4$,...
We present measurements of the semi-inclusive cross sections for νμ- and ν¯μ-nucleon deep inelastic scattering interactions with two oppositely charged muons in final state. These events dominantly arise from production a charm quark during process. The measurement was obtained analysis 5102 νμ-induced 1458 ν¯μ-induced collected NuTeV detector exposed to sign-selected beam at Fermilab Tevatron. also extract cross-section reanalysis 5030 1060 exposure same quad-triplet by Chicago Columbia...
We present a measurement of neutrino tridents, muon pairs induced by scattering in the Coulomb field target nucleus, Columbia-Chicago-Fermilab-Rochester experiment at Fermilab Tevatron. The observed number tridents after geometric and kinematic corrections, 37.0\ifmmode\pm\else\textpm\fi{}12.4, supports standard-model prediction 45.3\ifmmode\pm\else\textpm\fi{}2.3 events. This is first demonstration W-Z destructive interference from rules out, 99% C.L., V-A without interference.
We present an improved determination of the proton structure functions ${F}_{2}$ and ${\mathrm{xF}}_{3}$ from Columbia-Chicago-Fermilab-Rochester Collaboration $\ensuremath{\nu}\ensuremath{-}\mathrm{Fe}$ deep inelastic scattering experiment. Comparisons to corrected high-statistics charged-lepton results for NMC, E665, SLAC, BCDMS experiments indicate good agreement $x>0.1$ but some discrepancy at lower $x$. The ${Q}^{2}$ evolution both yields a value strong coupling constant scale mass $Z$...
We report the results of a search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance by Main Injector Neutrino Oscillation Search [D. G. Michael et al. (MINOS), Phys. Rev. Lett. 97, 191801 (2006).]. The experiment uses two detectors separated 734 km to observe beam neutrinos created Neutrinos at facility Fermi National Accelerator Laboratory. data were collected in first 282 days operations and correspond an exposure $1.27\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target....
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.
The NuTeV experiment at Fermilab has obtained a unique high-statistics sample of neutrino and antineutrino interactions using its high-energy sign-selected beam. We present measurement the differential cross section for charged-current scattering from iron. determine relative ν¯ to ν section, r=σν¯/σν, high energy with errors factor 2 smaller than previous world average. Structure functions, F2(x,Q2) xF3(x,Q2), are determined by fitting inelasticity, y, dependence sections. This...
The velocity of a ∼3 GeV neutrino beam is measured by comparing detection times at the near and far detectors MINOS experiment, separated 734 km. A total 473 detector events was used to measure (v−c)/c=5.1±2.9×10−5 (at 68% C.L.). By correlating energies 258 charged-current their arrival detector, limit imposed on mass mν<50 MeV/c2 (99% C.L.).Received 4 June 2007DOI:https://doi.org/10.1103/PhysRevD.76.072005©2007 American Physical Society
Using a muon neutrino source at Fermilab, the NOvA collaboration has measured disappearance and electron appearance, strengthening constraints on $C\phantom{\rule{0}{0ex}}P$-violating phase in inverted-neutrino-mass-hierarchy case.
The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- with a sensitivity approximately four orders of magnitude better than current world's best limits this process. experiment's offers discovery potential over wide array new physics models and probes mass scales well beyond reach LHC. We describe herein preliminary design proposed experiment. This document was created in partial fulfillment requirements necessary to...
This paper reports the first measurement using NOvA detectors of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ disappearance in a beam. The analysis uses 14 kton-equivalent exposure $2.74\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons-on-target from Fermilab NuMI Assuming normal neutrino mass hierarchy, we measure $\mathrm{\ensuremath{\Delta}}{m}_{32}^{2}=({2.52}_{\ensuremath{-}0.18}^{+0.20})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}\text{ }\text{ }{\mathrm{eV}}^{2}$ and...
This Letter reports new results on muon neutrino disappearance from NOvA, using a 14 kton detector equivalent exposure of $6.05\times10^{20}$ protons-on-target the NuMI beam at Fermi National Accelerator Laboratory. The measurement probes muon-tau symmetry hypothesis that requires maximal mixing ($\theta_{23} = \pi/4$). Assuming normal mass hierarchy, we find $\Delta m^2 (2.67 \pm 0.11)\times 10^{-3}$ eV$^2$ and $\sin^2 \theta_{23}$ two statistically degenerate values...
The DUNE IDR describes the proposed physics program and technical designs of Far Detector modules in preparation for full TDR to be published 2019. It is intended as an intermediate milestone on path a TDR, justifying choices that flow down from high-level goals through requirements at all levels Project. These design will enable experiment make ground-breaking discoveries help answer fundamental questions. Volume 1 contains executive summary general aims this document. remainder first...
A search for neutral heavy leptons (NHLs) has been performed using an instrumented decay channel at the NuTeV (E-815) experiment Fermilab. The data were examined NHLs decaying into muonic final states ( $\ensuremath{\mu}\ensuremath{\mu}\ensuremath{\nu}$, $\ensuremath{\mu}e\ensuremath{\nu}$, $\ensuremath{\mu}\ensuremath{\pi}$, and $\ensuremath{\mu}\ensuremath{\rho}$); no evidence found in 0.25--2.0 GeV mass range. This analysis places limits on mixing of with standard light neutrinos a level...
A high-statistics study by the Columbia-Chicago-Fermilab-Rochester Collaboration of opposite-sign dimuon events induced neutrino-nucleon scattering at Fermilab Tevatron is presented. sample 5044 νμ and 1062 ν¯μ μ∓μ± with Pμ1≥9 GeV/c, Pμ2≥5 30≤Eν≤600 GeV, 〈Q2〉=22.2 GeV2/c2 observed. The data support slow-rescaling model charm production a value mc=1.31±0.24 GeV2/c2. first measurement Q2 dependence nucleon strange quark distribution xs(x) yield Cabibbo-Kobayashi-Maskawa matrix element...