A5107868320- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Muon and positron interactions and applications
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Geophysics and Gravity Measurements
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
- Advanced Neural Network Applications
- Geophysical Methods and Applications
- Graphite, nuclear technology, radiation studies
- Noncommutative and Quantum Gravity Theories
- Electron and X-Ray Spectroscopy Techniques
- Computational Physics and Python Applications
- Radiation Therapy and Dosimetry
- Semiconductor materials and devices
- Silicon Carbide Semiconductor Technologies
University of Pennsylvania
2018-2024
California University of Pennsylvania
2019-2024
Stony Brook University
2000-2023
University of Bern
2023
Albert Einstein College of Medicine
2023
Eötvös Loránd University
2023
Boston University
2023
Duke University
2023
Universidad Autónoma de Madrid
2023
University of California, Irvine
2023
We present results of a study neutrino oscillation based on 766 ton-year exposure KamLAND to reactor anti-neutrinos. observe 258 \nuebar\ candidate events with energies above 3.4 MeV compared 365.2 expected in the absence oscillation. Accounting for 17.8 background events, statistical significance \nuebar disappearance is 99.998%. The observed energy spectrum disagrees spectral shape at 99.6% and prefers distortion from effects. A two-neutrino analysis data gives \DeltaMSq =...
The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau or sterile neutrinos, as both hypotheses fit the data. Using recorded in 1100 live days of Super-Kamiokande detector, we use three complementary samples to study difference zenith angle distribution due neutral currents and matter effects. We find no evidence favoring reject hypothesis at 99% confidence level. On other hand, that oscillation between suffices explain all...
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...
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...
Using a high-statistics, high-purity sample of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$-induced charged current, pion events in mineral oil (${\mathrm{CH}}_{2}$), MiniBooNE reports collection interaction cross sections for this process. This includes measurements the $\mathrm{CC}{\ensuremath{\pi}}^{+}$ section as function neutrino energy, well flux-averaged single- and double-differential energy direction both final-state muon pion. In addition, each single-differential are extracted to...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
Abstract Scattering of high energy particles from nucleons probes their structure, as was done in the experiments that established non-zero size proton using electron beams 1 . The use charged leptons scattering enables measuring distribution electric charges, which is encoded vector form factors nucleon 2 weakly interacting neutrinos gives opportunity to measure both and axial nucleon, providing an additional, complementary probe structure. transition factor, F A , can be measured neutrino...
Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found an expected background 1.1+/-0.4 events. This result can be obtain limit on nu;(e) fluxes any origin. Assuming that all flux its origin Sun and characteristic 8B solar nu(e) spectrum, we upper 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) flux. We interpret this limit, 2.8 10(-4) standard model flux, framework spin-flavor precession...
The SciBooNE and MiniBooNE collaborations report the results of a ν_μdisappearance search in Δm^2 region 0.5-40 eV^2. neutrino rate as measured by tracking detectors is used to constrain at Cherenkov detector first joint analysis data from both collaborations. Two separate analyses combined samples set 90% confidence level (CL) limits on eV^2 region, with an improvement over previous experimental constraints between 10 30
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,...
Using a custom 3-Čerenkov ring fitter, we report cross sections for νμ-induced charged-current single π0 production on mineral oil (CH2) from sample of 5810 candidate events with 57% signal purity over an energy range 0.5–2.0 GeV. This includes measurements the absolute total section as function neutrino energy, and flux-averaged differential measured in terms Q2, μ− kinematics, kinematics. The yields (9.2±0.3stat±1.5syst)×10−39 cm2/CH2 at mean 0.965 GeV.7 MoreReceived 15 October...
MiniBooNE reports the first absolute cross sections for neutral current single ${\ensuremath{\pi}}^{0}$ production on ${\mathrm{CH}}_{2}$ induced by neutrino and antineutrino interactions measured from largest sets of NC events collected to date. The principal result consists differential as functions momentum angle averaged over flux at MiniBooNE. We find total...
We report a measurement of the neutrino-electron elastic scattering rate from ${}^{8}$B solar neutrinos based on 123 kton-day exposure KamLAND. The background-subtracted electron recoil rate, above 5.5-MeV analysis threshold is 1.49 $\ifmmode\pm\else\textpm\fi{}$ 0.14(stat) 0.17(syst) events per kton-day. Interpreted as due to pure flavor flux with neutrino spectrum, this corresponds spectrum integrated 2.77 0.26(stat) 0.32(syst) $\ifmmode\times\else\texttimes\fi{}$10${}^{6}$...
The sidereal time dependence of MiniBooNE νe and ν¯e appearance data is analyzed to search for evidence Lorentz CPT violation. An unbinned Kolmogorov–Smirnov (K–S) test shows both the are compatible with null variation hypothesis more than 5%. Using an likelihood fit a Lorentz-violating oscillation model derived from Standard Model Extension (SME) describe any excess events over background, we find that prefer time-independent solution, slightly time-dependent solution. Limits order 10−20GeV...
Elastic neutrino scattering on electrons is a precisely-known purely leptonic process that provides standard candle for measuring flux in conventional beams. Using total sample of 810 neutino-electron scatters after background subtraction, the measurement reduces normalization uncertainty muon NuMI between 2 and 20 GeV from 7.5% to 3.9%. This most precise neutrino-electron date, will reduce uncertainties MINERvA's absolute cross section measurements, demonstrates technique can be used future...
We report a measurement of the neutrino-electron elastic scattering rate 862 keV 7Be solar neutrinos based on 165.4 kton-day exposure KamLAND. The observed is 582 +/- 90 (kton-day)^-1, which corresponds to neutrino flux (3.26 0.50) x 10^9 cm^-2s^-1, assuming pure electron flavor flux. Comparing this with standard model prediction and further three mixing, nu_e survival probability 0.66 0.14 determined from KamLAND data. Utilizing global oscillation analysis, we obtain total (5.82 0.98)...
MINERvA presents a new analysis of neutrino induced quasielastic-like interactions in hydrocarbon tracking target. We report double-differential cross section using the muon transverse and longitudinal momentum. In addition, differential sections as function square four-momentum transferred energy are calculated quasielastic hypothesis. Finally, an deposited near interaction vertex is presented. These results compared to modified GENIE predictions well NuWro prediction. All use dataset...
The MiniBooNE Collaboration reports a search for νμ and ¯νμ disappearance in the Δm2 region of 0.5–40 eV2. These measurements are important constraining models with extra types neutrinos, dimensions, CPT violation. Fits to shape energy spectra reveal no evidence at 90% confidence level (C.L.) either mode. test probes below Δm2=40 eV2 never explored before.Received 11 March 2009DOI:https://doi.org/10.1103/PhysRevLett.103.061802©2009 American Physical Society
We have measured new observables based on the final state kinematic imbalances in mesonless production of ${\ensuremath{\nu}}_{\ensuremath{\mu}}+A\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}+p+X$ MINER\ensuremath{\nu}A tracker. Components muon-proton momentum parallel ($\ensuremath{\delta}{p}_{\mathrm{Ty}}$) and perpendicular ($\ensuremath{\delta}{p}_{\mathrm{Tx}}$) to transfer transverse plane are found be sensitive nuclear effects such as Fermi motion, binding energy,...
The Kamioka Liquid scintillator Anti-Neutrino Detector is used in a search for single neutron or two-neutron intranuclear disappearance that would produce holes the s-shell energy level of 12C nuclei. Such could be created as result nucleon decay into invisible modes (inv), e.g., n→3ν nn→2ν. deexcitation corresponding daughter nucleus results sequence space and time-correlated events observable liquid detector. We report on new limits one- disappearance: τ(n→inv)>5.8×1029 years...
We study neutrino-induced charged-current (CC) $\pi^0$ production on carbon nuclei using events with fully imaged final-state proton-$\pi^0$ systems. Novel use of correlations based transverse kinematic imbalance enable the first measurements struck nucleon's Fermi motion, intranuclear momentum transfer (IMT) dynamics, and hadronic configuration in neutrino pion production. Event distributions are presented for i) momenta neutrino-struck neutrons below surface, ii) direction missing...
Two independent methods are employed to measure the neutrino flux of anti-neutrino-mode beam observed by MiniBooNE detector. The first method compares data simulated event rates in a high purity $\numu$ induced charged-current single $\pip$ (CC1$\pip$) sample while second exploits difference between angular distributions muons created and $\numub$ quasi-elastic (CCQE) interactions. results from both analyses indicate prediction component pre-dominately anti-neutrino is over-estimated -...