A5000634972- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- Particle Accelerators and Free-Electron Lasers
- Educational Technology and Assessment
- Graphite, nuclear technology, radiation studies
- Chemical and Physical Properties of Materials
- Inorganic Fluorides and Related Compounds
- Radioactive Decay and Measurement Techniques
- Intelligent Tutoring Systems and Adaptive Learning
- Geophysical and Geoelectrical Methods
- Noncommutative and Quantum Gravity Theories
Fermi National Accelerator Laboratory
2015-2024
Colorado State University
2011-2024
University of Illinois Urbana-Champaign
2022
Hampton University
2009-2020
University of Regina
2017
TRIUMF
2017
McGill University
2017
United States Department of Energy
2015
Minerva Foundation
2013
Otterbein University
2012
We report on a search for neutrinoless double-beta decay of $^{136}$Xe with EXO-200. No signal is observed an exposure 32.5 kg-yr, background ~1.5 x 10^{-3} /(kg yr keV) in the $\pm 1\sigma$ region interest. This sets lower limit half-life $T_{1/2}^{0\nu\beta\beta}$($^{136}$Xe) > 1.6 10$^{25}$ (90% CL), corresponding to effective Majorana masses less than 140-380 meV, depending matrix element calculation.
Results from a search for neutrinoless double-beta decay (0νββ) of ^{136}Xe are presented using the first year data taken with upgraded EXO-200 detector. Relative to previous searches by EXO-200, energy resolution detector has been improved σ/E=1.23%, electric field in drift region raised 50%, and system suppress radon volume between cryostat lead shielding implemented. In addition, analysis techniques that improve topological discrimination 0νββ background events have developed....
We report the observation of two-neutrino double-beta decay in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) 0.21 (sys.) x 10^21 yr. This second order process, predicted by Standard Model, has been observed for several nuclei but not Xe-136. The rate provides new input to matrix element calculations and search more interesting neutrino-less decay, most sensitive probe existence Majorana particles measurement neutrino mass scale.
We report on an improved measurement of the $2\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ half-life ${}^{136}$Xe performed by EXO-200. The use a large and homogeneous time-projection chamber allows for precise estimate fiducial mass used measurement, resulting in small systematic uncertainty. also discuss detail data-analysis methods double-$\ensuremath{\beta}$ decay searches with EXO-200, while emphasizing those directly related to present measurement. is found be...
Knowledge of the neutrino flux produced by Neutrinos at Main Injector (NuMI) beamline is essential to oscillation and interaction measurements MINERvA, MINOS+, NOvA MicroBooNE experiments Fermi National Accelerator Laboratory. We have a prediction which uses all available relevant hadron production data, incorporating particle off thin targets as well yields from spare NuMI target exposed 120 GeV proton beam. The result most precise achieved for beam in one tens energy region. also compared...
Two different nuclear-medium effects are isolated using a low three-momentum transfer subsample of neutrino-carbon scattering data from the MINERvA neutrino experiment. The observed hadronic energy in charged-current $\nu_\mu$ interactions is combined with muon kinematics to permit separation quasielastic and $\Delta$(1232) resonance processes. First, we observe small cross section at very that matches expected screening effect long-range nucleon correlations. Second, additions event rate...
EXO-200 is an experiment designed to search for double beta decay of $^{136}$Xe with a single-phase, liquid xenon detector. It uses active mass 110 kg enriched 80.6% in the isotope 136 ultra-low background time projection chamber capable simultaneous detection ionization and scintillation. This paper describes detector particular attention most innovative aspects design that revolve around reduction backgrounds, efficient use expensive isotopically xenon, optimization energy resolution...
Charged pion production via charged-current ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ interactions on plastic scintillator (CH) is studied using the MINERvA detector exposed to NuMI wideband neutrino beam at Fermilab. Events with hadronic invariant mass $W<1.4\text{ }\text{ }\mathrm{GeV}$ and $W<1.8\text{ are selected in separate analyses: lower $W$ cut isolates single production, which expected occur primarily through $\mathrm{\ensuremath{\Delta}}(1232)$ resonance, while results from higher...
Neutrino-induced coherent charged pion production on nuclei νμA→μ(±)π(∓)A is a rare, inelastic interaction in which small squared four-momentum |t| transferred to the recoil nucleus, leaving it intact reaction. In scintillator tracker of MINERvA, we remove events with evidence particles from nuclear breakup and reconstruct final-state muon. We select low isolate sample rich candidates. By selecting events, produce model-independent measurement differential cross section for scattering...
Final-state kinematic imbalances are measured in mesonless production of ν_{μ}+A→μ^{-}+p+X the MINERvA tracker. Initial- and final-state nuclear effects probed using direction μ^{-}-p transverse momentum imbalance initial-state struck neutron. Differential cross sections compared to predictions based on current approaches medium modeling. These models underpredict section at intermediate intranuclear transfers that generally exceed Fermi momenta. As neutrino interaction need correctly...
Muon-neutrino elastic scattering on electrons is an observable neutrino process whose cross section precisely known. Consequently a measurement of this in accelerator-based $\nu_\mu$ beam can improve the knowledge absolute flux impinging upon detector; typically limited to $\sim$ 10% due uncertainties hadron production and focusing. We have isolated sample 135 $\pm$ 17 neutrino-electron candidates segmented scintillator detector MINERvA, after subtracting backgrounds correcting for...
We present measurements of $\nu_{\mu}$ charged-current cross section ratios on carbon, iron, and lead relative to a scintillator (CH) using the fine-grained MINERvA detector exposed NuMI neutrino beam at Fermilab. The utilize events energies $2<E_{\nu}<20~GeV$, with $\left< E_{\nu}\right>=8~GeV$, which have reconstructed $\mu^{-}$ scattering angle less than $17^\circ$ extract inclusive total sections as function energy $E_{\nu}$ flux-integrated differential respect Bjorken scaling variable...
Separate samples of charged-current pion production events representing two semi-inclusive channels ${\ensuremath{\nu}}_{\ensuremath{\mu}}\text{\ensuremath{-}}\mathrm{CC}({\ensuremath{\pi}}^{+})$ and ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}\text{\ensuremath{-}}\mathrm{CC}({\ensuremath{\pi}}^{0})$ have been obtained using neutrino antineutrino exposures the MINERvA detector. Distributions in kinematic variables based upon ${\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}$-track...
A study of charged-current muon neutrino scattering on hydrocarbon in which the final state includes a and proton no pions is presented. Although this signature has topology quasielastic from neutrons, event sample contains contributions both inelastic processes where are absorbed nucleus. The analysis accepts events with production angles up to 70$^{\circ}$ kinetic energies greater than 110 MeV. extracted cross section, when based completely hadronic kinematics, well-described by simple...
Received 31 January 2017DOI:https://doi.org/10.1103/PhysRevD.95.039903© 2017 American Physical SocietyPhysics Subject Headings (PhySH)Beam code development & simulation techniquesResearch AreasBeam dynamicsBeam techniquesSecondary beamsPhysical SystemsNeutrinosParticles FieldsAccelerators Beams
Single neutral pion production via muon antineutrino charged-current interactions in plastic scintillator (CH) is studied using the \minerva detector exposed to NuMI low-energy, wideband beam at Fermilab. Measurement of this process constrains models nuclei, which important because neutral-current analog a background for $\bar{\nu}_e$ appearance oscillation experiments. The differential cross sections $\pi^0$ momentum and angle, events with single observed no charged pions, are presented...
The first direct measurement of electron neutrino quasielastic and quasielasticlike scattering on hydrocarbon in the few-GeV region incident energy has been carried out using MINERvA detector NuMI beam at Fermilab. flux-integrated differential cross sections production angle, energy, Q^{2} are presented. ratio quasielastic, section for ν_{e} with that similarly selected ν_{μ}-induced events from same exposure is used to probe assumptions underpin conventional treatments charged-current...
A search for Lorentz- and $CPT$-violating signals in the double beta decay spectrum of $^{136}\mathrm{Xe}$ has been performed using an exposure $100\text{ }\text{ }\mathrm{kg}\ifmmode\cdot\else\textperiodcentered\fi{}\mathrm{yr}$ with EXO-200 detector. No significant evidence spectral modification due to isotropic Lorentz-violation was found, a two-sided limit $\ensuremath{-}2.65\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}\text{...
We present results from a high precision experimental study of the nuclear modification longitudinal ($F_L$) to transverse ($F_1$) structure function ratio for bound nucleons in resonance region. The inclusive electron scattering cross sections were measured Jefferson Lab Experimental Hall C on carbon and deuterium nuclei large range kinematics, allowing separations functions be performed at four-momentum transfer values $0.5 \le Q^2 \le$ 3.75~GeV$^2$. In contrast significant body...
EXO-200 is a single phase liquid xenon detector designed to search for neutrinoless double-beta decay of $^{136}$Xe. Here we report on various Majoron-emitting modes based 100 kg$\cdot$yr exposure A lower limit $T^{^{136}Xe}_{1/2} >1.2 \cdot 10^{24}$ yr at 90% C.L. the half-life spectral index = 1 Majoron was obtained, corresponding constraint Majoron-neutrino coupling constant $|< g^{M}_{ee} >|<$ (0.8-1.7)$\cdot$10$^{-5}$.
Alpha decays in the EXO-200 detector are used to measure fraction of charged $^{218}\text{Po}$ and $^{214}\text{Bi}$ daughters created from $\ensuremath{\alpha}$ $\ensuremath{\beta}$ decays, respectively. $^{222}\text{Rn} \ensuremath{\alpha}$ liquid xenon (LXe) found produce $^{218}\text{Po}^{+}$ ions $50.3\ifmmode\pm\else\textpm\fi{}3.0%$ time, while remainder atoms neutral. The $^{214}\text{Bi}^{+}$ $^{214}\text{Pb} \ensuremath{\beta}$ LXe is be $76.4\ifmmode\pm\else\textpm\fi{}5.7%$,...
The MINERvA Collaboration reports a novel study of neutrino-nucleus charged-current deep inelastic scattering (DIS) using the same neutrino beam incident on targets polystyrene, graphite, iron, and lead. Results are presented as ratios C, Fe, Pb to CH. total DIS cross sections function energy flux-integrated differential Bjorken scaling variable $x$ in neutrino-energy range 5--50 GeV. Based predictions charged-lepton ratios, good agreement is found between data prediction at medium low...
The MINERvA collaboration operated a scaled-down replica of thesolid scintillator tracking and sampling calorimeter regions the detector in hadron test beam at Fermilab Test Beam Facility. This paper reports measurements with samples protons, pions, electrons from 0.35 to 2.0 GeV/c momentum. calorimetric response is obtained these data. A measurement parameter Birks׳ law an estimate efficiency are extracted proton sample. Overall data well described by Geant4-based Monte Carlo simulation...
The EXO-200 Collaboration is searching for neutrinoless double $\ensuremath{\beta}$ decay using a liquid xenon (LXe) time projection chamber. This measurement relies on modeling the transport of charge deposits produced by interactions in LXe to allow discrimination between signal and background events. Here we present measurements transverse diffusion constant drift velocity electrons at fields 20 V/cm 615 data. At operating field 380 measures...