A. V. Waldron
A5088980326- 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
- Quantum, superfluid, helium dynamics
- High-Energy Particle Collisions Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced NMR Techniques and Applications
- Cognitive Computing and Networks
- Advanced Semiconductor Detectors and Materials
- CCD and CMOS Imaging Sensors
- Advanced Optical Sensing Technologies
- Graph Theory and Algorithms
- Functional Brain Connectivity Studies
Imperial College London
2019-2024
Queen Mary University of London
2023-2024
Minerva Foundation
2022-2023
University of Cincinnati
2023
University of Oxford
2011-2022
European Organization for Nuclear Research
2021
University of Sussex
2013-2016
Institute of Particle Physics
2011-2013
University of Alberta
2011-2013
University of California, Irvine
2013
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...
The T2K experiment studies oscillations of an off-axis muon neutrino beam between the J-PARC accelerator complex and Super-Kamiokande detector. Special emphasis is placed on measuring mixing angle theta_13 by observing electron appearance via sub-dominant to oscillation, searching for CP violation in lepton sector. includes a sophisticated, off-axis, near detector, ND280, situated 280 m downstream production target order measure properties understand better interactions at energy scale below...
The next generation of very-short-baseline reactor experiments will require compact detectors operating at surface level and close to a nuclear reactor. This paper presents new detector concept based on composite solid scintillator technology. target uses cubes polyvinyltoluene interleaved with 6LiF:ZnS(Ag) phosphor screens detect the products inverse beta decay reaction. A multi-tonne system built from these individual cells can provide precise localisation scintillation signals, making...
This MINERvA analysis is the first neutrino and antineutrino study of a shallow inelastic scattering region, which transition region between resonant production deep processes. explicitly included in this by expanding scope to include not only mainly lower-$Q^2$ nonresonant pion but also kinematic where off quarks within nucleon becomes significant with $Q^2$ below onset deep-inelastic defined analysis. To reduce resonance background 1.5 $<$ $W$ 2 GeV/$c^2$ was chosen. In addition inclusive...
Processes with precisely known cross sections, like neutrino-electron elastic scattering ($\ensuremath{\nu}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\nu}{e}^{\ensuremath{-}}$) and inverse muon decay (${\ensuremath{\nu}}_{\ensuremath{\mu}}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\nu}}_{e}$) have been used by $\mathrm{M}\mathrm{I}\mathrm{N}\mathrm{E}\mathrm{R}\ensuremath{\nu}\mathrm{A}$ to constrain the uncertainty on neutrinos...
Neutrino charged-current quasielastic-like scattering, a reaction category extensively used in neutrino oscillation measurements, probes nuclear effects that govern neutrino-nucleus interactions. This Letter reports the first measurement of triple-differential cross section for ν_{μ} reactions using hydrocarbon medium MINERvA detector exposed to wideband beam spanning 2≤E_{ν}≤20 GeV. The maps correlations among transverse and longitudinal muon momenta summed proton kinetic energies, compares...
The MINERνA experiment reports double-differential cross-section measurements for νμ-carbon interactions with three-momentum transfer |→q|<1.2 GeV obtained medium energy exposures in the NuMI beam. These are performed as a function of and an estimator called available defined that would be visible detector. cross sections compared to genie nuwro predictions along modified version which incorporates new models better agreement earlier from MINERνA. In these measurements, quasielastic,...
Abstract With the advance of particle accelerator and detector technologies, neutrino physics landscape is rapidly expanding. As oscillation experiments enter intensity precision frontiers, neutrino–nucleus interaction measurements are providing crucial input. MINERvA an experiment at Fermilab dedicated to study interactions in regime incident energies from one few GeV. The recorded antineutrino scattering data with NuMI beamline 2009 2019 using Low-Energy Medium-Energy beams that peak 3GeV...
MINERvA presents a new analysis of inclusive charged-current neutrino interactions on hydrocarbon target. We report single and double-differential cross sections in muon transverse longitudinal momentum. These measurements are compared to interaction generator predictions from GENIE, NuWro, GiBUU, NEUT. In addition, comparisons against models with different treatments multi-nucleon correlations, nuclear effects, resonant pion production, deep inelastic scattering presented. The data recorded...
Accelerator based neutrino oscillation experiments seek to measure the relative number of electron and muon (anti)neutrinos at different <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>L</a:mi><a:mo>/</a:mo><a:mi>E</a:mi></a:math> values. However high statistics studies interactions are almost exclusively measured using since dominant flavor neutrinos produced by accelerator beams type. This work reports new measurements in hydrocarbon, obtained strongly...
Inverse muon decay, ${\ensuremath{\nu}}_{\ensuremath{\mu}}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\nu}}_{e}$, is a reaction whose cross section can be predicted with very small uncertainties. It has neutrino energy threshold of $\ensuremath{\approx}11\text{ }\text{ }\mathrm{GeV}$ and used to constrain the high-energy part flux in NuMI beam. This dominant source events which only contain muons nearly parallel direction We have isolated...
Charged-current neutrino interactions with low hadronic recoil ("low-ν") have a cross-section that is approximately constant versus energy. These been used to measure the shape of fluxes as function energy at accelerator-based experiments such CCFR, NuTeV, MINOS and MINERνA. In this paper, we demonstrate low-ν events can be parameters flux detector models utilization event distributions over upstream face discriminate among affect model. From fitting large sample obtained by exposing MINERνA...
This Letter presents the first simultaneous measurement of quasielasticlike neutrino-nucleus cross sections on C, water, Fe, Pb, and scintillator (hydrocarbon or CH) as a function longitudinal transverse muon momentum. The ratio per nucleon between Pb CH is always above unity has characteristic shape momentum that evolves slowly constant versus within uncertainties 4.5 GeV/c. section ratios to for Fe remain roughly with increasing momentum, water C do not have any significant deviation from...
Neutrino-induced charged-current single ${\ensuremath{\pi}}^{+}$ production in the $\mathrm{\ensuremath{\Delta}}(1232)$ resonance region is of considerable interest to accelerator-based neutrino oscillation experiments. In this Letter, high statistic differential cross sections are reported for semiexclusive reaction ${\ensuremath{\nu}}_{\ensuremath{\mu}}A\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}+$ nucleon(s) on scintillator, carbon, water, iron, and...
MINERvA has measured the ν_{μ}-induced coherent π^{+} cross section simultaneously in hydrocarbon (CH), graphite (C), iron (Fe), and lead (Pb) targets using neutrinos from 2 to 20 GeV. The measurements exceed predictions of Rein-Sehgal Berger-Sehgal PCAC based models at multi-GeV ν_{μ} energies produced angles, E_{π}>1 GeV θ_{π}<10°. Measurements cross-section ratios Fe Pb relative CH reveal effective A scaling increase an approximate A^{1/3} few A^{2/3} for E_{ν}>10
The measurements of proton–nucleus scattering and high resolution neutrino–nucleus interaction imaging are key in reducing neutrino oscillation systematic uncertainties future experiments. A High Pressure Time Projection Chamber (HPTPC) prototype has been constructed operated at the Royal Holloway University London CERN as a first step development HPTPC that is capable performing these part long-baseline experiment, such Deep Underground Neutrino Experiment. In this paper, we describe design...
Abstract New neutrino–nucleus interaction cross-section measurements are required to improve nuclear models sufficiently for future long baseline neutrino experiments meet their sensitivity goals. A time projection chamber (TPC) filled with a high-pressure gas is promising detector characterise the sources used such experiments. gas-filled TPC ideal measuring low-energy particles, which travel further in than solid or liquid detectors and using increases target density, resulting more...
The NOνA experiment is a long-baseline neutrino designed to make measurements determine the mass hierarchy, mixing parameters and CP violation in sector. In order these collaboration has highly distributed, synchronized, continuous digitization readout system that able acquire correlate data from Fermilab accelerator complex (NuMI), near detector at site far which located 810 km away Ash River, MN. This unique properties let it fully exploit physics capabilities of detector. design DAQ its...
We present measurements of the cross section for antineutrino charged-current quasielasticlike scattering on hydrocarbon using medium energy NuMI wide-band neutrino beam peaking at $⟨{E}_{\overline{\ensuremath{\nu}}}⟩\ensuremath{\sim}6\text{ }\text{ }\mathrm{GeV}$. The are presented as a function longitudinal momentum (${p}_{||}$) and transverse (${p}_{T}$) final state muon. This work complements our previously reported high statistics measurement in channel extends previous made low...
Neutron production in antineutrino interactions can lead to bias energy reconstruction neutrino oscillation experiments, but these have rarely been studied. MINERvA previously studied neutron at an average of ∼3 GeV 2016 and found deficiencies leading models. In this paper, the 6 dataset is shown similar disagreements. A measurement cross section for produce two or more neutrons low visible presented as experiment-independent way explore modeling. This disagrees with several models’...
Measurements of proton-nucleus scattering and high resolution neutrino-nucleus interaction imaging are key to reduce neutrino oscillation systematic uncertainties in future experiments. A High Pressure Time Projection Chamber (HPTPC) prototype has been constructed operated at Royal Holloway University London CERN as a first step the development HPTPC capable performing these measurements part long-baseline experiment such Deep Underground Neutrino Experiment. In this paper we describe design...
The \minerva experiment reports double-differential cross-section measurements for $ν_μ$-carbon interactions with three-momentum transfer $|\vec{q}| < 1.2$ GeV obtained medium energy exposures in the NuMI beam. These are performed as a function of and an estimator called available defined that would be visible detector. double differential cross sections compared to GENIE NuWro predictions along modified version which incorporates new models better agreement earlier from MINERvA. In these...
In this paper we describe how two or more experimental results can be combined within the procedure of Feldman and Cousins, to provide confidence limits on physical parameters interest. We demonstrate technique by combining recent electron neutrino appearance from T2K MINOS. Our best fit point is sin2 2θ13 = 0.08 (0.11) δ 1.1 (2.0)π; in addition exclude 0 at 2.7σ (2.8σ) for normal (inverted) mass hierarchy.