A5088612307- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Computational Physics and Python Applications
- Noncommutative and Quantum Gravity Theories
- X-ray Spectroscopy and Fluorescence Analysis
- Distributed and Parallel Computing Systems
- Radiation Therapy and Dosimetry
- Advanced NMR Techniques and Applications
- Radioactivity and Radon Measurements
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
Indiana University
2004-2025
Indiana University Bloomington
2014-2024
South Dakota School of Mines and Technology
2021
University of Alabama
2021
Institute for Nuclear Research
2021
Imperial College London
2018
Fermi National Accelerator Laboratory
2014
Instituto Nacional de Investigaciones Nucleares
2009
University of Illinois System
1989-2006
Los Alamos National Laboratory
1996-2004
A search for ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\overline{\ensuremath{\nu}}}_{e}$ oscillations was conducted by the Liquid Scintillator Neutrino Detector at Los Alamos Neutron Science Center using ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$ from ${\ensuremath{\mu}}^{+}$ decay rest. total excess of $87.9\ifmmode\pm\else\textpm\fi{}22.4\ifmmode\pm\else\textpm\fi{}6.0$ events consistent with...
A search for $\bar\nu_{\mu}\to \bar\nu_{e}$ oscillations has been conducted at the Los Alamos Meson Physics Facility by using $\bar\nu_\mu$ from $\mu^+$ decay rest. The $\bar\nu_e$ are detected via reaction $\bar\nu_e\,p \rightarrow e^{+}\,n$, correlated with a $\gamma$ $np\rightarrow d\gamma$ ($2.2\,{\rm MeV}$). use of tight cuts to identify $e^+$ events rays yields 22 energy between 36 and $60\,{\rm MeV}$ only $4.6 \pm 0.6$ background events. fit 20 total excess $51.8^{+18.7}_{-16.9} 8.0$...
The coherent elastic scattering of neutrinos off nuclei has eluded detection for four decades, even though its predicted cross section is by far the largest all low-energy neutrino couplings. This mode interaction offers new opportunities to study properties and leads a miniaturization detector size, with potential technological applications. We observed this process at 6.7σ confidence level, using low-background, 14.6-kilogram CsI[Na] scintillator exposed emissions from Spallation Neutron...
The MiniBooNE experiment at Fermilab reports results from an analysis of $\bar \nu_e$ appearance data $11.27 \times 10^{20}$ protons on target in antineutrino mode, increase approximately a factor two over the previously reported results. An event excess $78.4 \pm 28.5$ events ($2.8 \sigma$) is observed energy range $200<E_\nu^{QE}<1250$ MeV. If interpreted two-neutrino oscillation model, $\bar{\nu}_{\mu}\rightarrow\bar{\nu}_e$, best fit to has probability 66% while background-only...
The MiniBooNE Collaboration reports first results of a search for $\nu_e$ appearance in $\nu_\mu$ beam. With two largely independent analyses, we observe no significant excess events above background reconstructed neutrino energies 475 MeV. data are consistent with oscillations within appearance-only oscillation model.
The MiniBooNE experiment at Fermilab reports results from an analysis of $\nu_e$ appearance data $12.84 \times 10^{20}$ protons on target in neutrino mode, increase approximately a factor two over previously reported results. A charged-current quasielastic event excess $381.2 \pm 85.2$ events ($4.5 \sigma$) is observed the energy range $200<E_\nu^{QE}<1250$~MeV. Combining these with $\bar \nu_e$ $11.27 antineutrino total plus $460.5 99.0$ ($4.7 observed. If interpreted two-neutrino...
The MiniBooNE experiment at Fermilab reports results from a search for ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\overline{\ensuremath{\nu}}}_{e}$ oscillations, using data sample corresponding to $5.66\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target. An excess of $20.9\ifmmode\pm\else\textpm\fi{}14.0$ events is observed in the energy range $475<{E}_{\ensuremath{\nu}}^{\mathrm{QE}}<1250\text{ }\text{ }\mathrm{MeV}$, which, when constrained by...
A high-statistics sample of charged-current muon neutrino scattering events collected with the MiniBooNE experiment is analyzed to extract first measurement double differential cross section ($\frac{d^2\sigma}{dT_\mu d\cos\theta_\mu}$) for quasielastic (CCQE) on carbon. This result features minimal model dependence and provides most complete information this process date. With assumption CCQE scattering, absolute as a function energy ($\sigma[E_\nu]$) single ($\frac{d\sigma}{dQ^2}$) are...
The MiniBooNE experiment at Fermilab reports results from an analysis of the combined $ν_e$ and $\bar ν_e$ appearance data $6.46 \times 10^{20}$ protons on target in neutrino mode $11.27 antineutrino mode. A total excess $240.3 \pm 34.5 52.6$ events ($3.8 σ$) is observed combining two sets energy range $200
We report the first measurement of coherent elastic neutrino-nucleus scattering (CEvNS) on argon using a liquid detector at Oak Ridge National Laboratory Spallation Neutron Source. Two independent analyses prefer CEvNS over background-only null hypothesis with greater than $3\ensuremath{\sigma}$ significance. The measured cross section, averaged incident neutrino flux, is $(2.2\ifmmode\pm\else\textpm\fi{}0.7)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}39}\text{ }\text{...
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,...
We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in high flux neutrinos produced at Spallation Neutron Source Oak Ridge National Laboratory. New data collected before detector decommissioning have more than doubled dataset since first observation CEvNS, achieved with this detector. Systematic uncertainties also been reduced an updated quenching model, allowing for improved precision. With these analysis improvements,...
A search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{e}$ oscillations has been conducted with the LSND apparatus using ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ from ${\ensuremath{\pi}}^{+}$ decay in flight. Two analyses observe a total of 40 beam-on high-energy (60--200 MeV) electron events consistent ${\ensuremath{\nu}}_{e}\mathrm{C}\ensuremath{\rightarrow}{e}^{\ensuremath{-}}X$ inclusive reaction. This number is significantly above...
A search for ${\ensuremath{\nu}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{e}$ oscillations has been conducted at the Los Alamos Meson Physics Facility using ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ from ${\ensuremath{\pi}}^{+}$ decay in flight. An excess number of beam-related events ${\ensuremath{\nu}}_{e}\stackrel{\ensuremath{\rightarrow}}{C}{e}^{\ensuremath{-}}X$ inclusive reaction is observed. The too large to be explained by normal ${\ensuremath{\nu}}_{e}$...
A search for ν¯μ→ν¯e oscillations has been conducted at the Los Alamos Meson Physics Facility using ν¯μ from μ+ decay rest. The ν¯e are detected via reaction ν¯ep→e+n, correlated with 2.2 MeV γ np→dγ. use of tight cuts to identify e+ events rays yields 22 energy between 36 and 60 only 4.6±0.6 background events. probability that this excess is due entirely a statistical fluctuation 4.1×10−8. χ2 fit entire sample results in total 51.0+20.2−19.5±8.0 20 MeV. If attributed oscillations,...
The largest sample ever recorded of ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$ charged-current quasielastic (CCQE, ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}+p\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}+n$) candidate events is used to produce the minimally model-dependent, flux-integrated double-differential cross section $\frac{{d}^{2}\ensuremath{\sigma}}{d{T}_{\ensuremath{\mu}}d\mathrm{cos}{\ensuremath{\theta}}_{\ensuremath{\mu}}}$ for CCQE a mineral oil target. This...
We report a measurement of the flux-averaged neutral-current elastic differential cross section for neutrinos scattering on mineral oil (${\mathrm{CH}}_{2}$) as function four-momentum transferred squared, ${Q}^{2}$. It is obtained by measuring kinematics recoiling nucleons with kinetic energy greater than 50 MeV which are readily detected in MiniBooNE. This cross-section distribution fit fixed nucleon form factors apart from an axial mass ${M}_{A}$ that provides best...
A search for sub-GeV dark matter produced from collisions of the Fermilab 8 GeV Booster protons with a steel beam dump was performed by MiniBooNE-DM Collaboration using data $1.86\ifmmode\times\else\texttimes\fi{}{10}^{20}$ on target in dedicated run. The MiniBooNE detector, consisting 818 tons mineral oil and located 490 meters downstream dump, is sensitive to variety initiated scattering reactions. Three interactions are considered this analysis: elastic off nucleons, inelastic neutral...
The MiniBooNE-DM Collaboration searched for vector-boson mediated production of dark matter using the Fermilab 8-GeV Booster proton beam in a dedicated run with 1.86×10^{20} protons delivered to steel dump. MiniBooNE detector, 490 m downstream, is sensitive via elastic scattering nucleons detector mineral oil. Analysis methods developed previous results were employed, and several constraining data sets simultaneously analyzed minimize systematic errors from neutrino flux interaction rates....
The COHERENT Collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220 MeV/c^{2} using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9 keV_{nr}. No evidence is found we thus place limits on allowed parameter space. With this low-threshold detector, are coherent elastic scattering nuclei. cross section process orders of magnitude higher than other processes historically used accelerator-based...
A model of neutrino oscillations is presented that has only 3 degrees freedom and appears compatible with existing data. The a subset the renormalizable sector Standard-Model Extension (SME), it offers candidate alternative to standard three-neutrino massive model. All classes data are described, including solar, reactor, atmospheric, LSND oscillations. disappearance solar neutrinos obtained without matter-enhanced Quantitative predictions offered for ongoing MiniBooNE experiment future...
The MiniBooNE Collaboration reports initial results from a search for ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\ensuremath{\rightarrow}{\overline{\ensuremath{\nu}}}_{e}$ oscillations. A signal-blind analysis was performed using data sample corresponding to $3.39\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target. are consistent with background prediction across the full range of neutrino energy reconstructed assuming quasielastic scattering,...