C. Patrick
A5077112428- 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
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Superconducting Materials and Applications
- Radioactive Decay and Measurement Techniques
- Chemical and Physical Properties of Materials
- Scientific Research and Discoveries
- Medical Imaging Techniques and Applications
- Image Retrieval and Classification Techniques
- Rare-earth and actinide compounds
- Advanced Image and Video Retrieval Techniques
- Cold Atom Physics and Bose-Einstein Condensates
- Fault Detection and Control Systems
- Magnetic Properties of Alloys
- Radiopharmaceutical Chemistry and Applications
University College London
2017-2024
Institut National de Physique Nucléaire et de Physique des Particules
2024
University of Edinburgh
2023-2024
Université de Bordeaux
2024
Centre National de la Recherche Scientifique
2024
Czech Technical University in Prague
2024
Edinburgh College
2024
University of Michigan–Ann Arbor
2020-2023
Northwestern University
2013-2019
Uppsala University
2018
We report a study of muon neutrino charged-current quasi-elastic events in the segmented scintillator inner tracker MINERvA experiment running NuMI beam at Fermilab. The were selected by requiring {\mu}^- and low calorimetric recoil energy separated from interaction vertex. measure flux-averaged differential cross-section, d{\sigma}/dQ^2, particle content final state. Deviations are found between measured d{\sigma}/dQ^2 expectations model independent nucleons relativistic Fermi gas. also...
We have isolated muon anti-neutrino charged-current quasi-elastic interactions occurring in the segmented scintillator tracking region of MINERvA detector running NuMI neutrino beam at Fermilab. measure flux-averaged differential cross-section, d{\sigma}/dQ^2, and compare to several theoretical models scattering. Good agreement is obtained with a model where nucleon axial mass, M_A, set 0.99 GeV/c^2 but vector form factors are modified account for observed enhancement, relative free case,...
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...
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...
The full data set of the NEMO-3 experiment has been used to measure half-life two-neutrino double beta decay $$^{100}$$ Mo ground state Ru, $$T_{1/2} = \left[ 6.81 \pm 0.01\,\left( \text{ stat }\right) ^{+0.38}_{-0.40}\,\left( syst \right] \times 10^{18}$$ year. two-electron energy sum, single electron spectra and distribution angle between electrons are presented with an unprecedented statistics $$5\times 10^5$$ events a signal-to-background ratio $$\sim $$ 80. Clear evidence for Single...
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...
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
Using data from the NEMO-3 experiment, we have measured two-neutrino double beta decay ( $$2\nu \beta $$ ) half-life of $$^{82}$$ Se as $$T_{\smash {1/2}}^{2\nu } \!=\! \left[ 9.39 \pm 0.17\left( \text{ stat }\right) 0.58\left( syst \right] \times 10^{19}$$ y under single-state dominance hypothesis for this nuclear transition. The corresponding matrix element is $$\left| M^{2\nu }\right| = 0.0498 0.0016$$ . In addition, a search neutrinoless $$0\nu using 0.93 kg observed total 5.25 has been...
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...
We present double-differential measurements of antineutrino charged-current quasielastic scattering in the MINERvA detector. This study improves on a previous single-differential measurement by using updated reconstruction algorithms and interaction models provides complete description observed muon kinematics form cross section with respect to transverse longitudinal momentum. include our signal definition zero-meson final states arising from multinucleon interactions resonant pion...
The performance of Hamamatsu 8" photomultiplier tubes (PMTs) the type used in SuperNEMO neutrinoless double-beta decay experiment (R5912-MOD), is investigated as a function exposure to helium (He) gas. Two PMTs were monitored for over year, one exposed varying concentrations He, and other kept standard atmospheric conditions control. Both light signals generated by Bi-207 radioactive source that provided consistent large input PMT similar those are typical experiment. energy resolution...
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 semi-exclusive channel $\nu_{\mu}+\textrm{CH}\rightarrow\mu^{-}\pi^{0}+\textrm{nucleon(s)}$ is analyzed using MINERvA exposed to the low-energy NuMI $\nu_{\mu}$ beam with spectral peak at $E_{\nu} \simeq 3$ GeV. Differential cross sections for muon momentum and production angle, $\pi^{0}$ kinetic energy squared four-momentum transfer are reported, section $\sigma(E_{\nu})$ obtained over range 1.5 GeV $\leq E_{\nu} <$ 20 Results compared GENIE NuWro predictions published...
Charged-current ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ interactions on carbon, iron, and lead with a final state hadronic system of one or more protons zero mesons are used to investigate the influence nuclear environment quasielasticlike interactions. The transferred four-momentum squared target nucleus, ${Q}^{2}$, is reconstructed based kinematics leading proton, differential cross sections versus ${Q}^{2}$ cross-section ratios lead, carbon scintillator measured for first time in single...
We report on multinucleon effects in low momentum transfer ($< 0.8$ GeV/c) anti-neutrino interactions plastic (CH) scintillator. These data are from the 2010-2011 antineutrino phase of MINERvA experiment at Fermilab. The hadronic energy spectrum this inclusive sample is well described when a screening effect and two-nucleon knockout process added to relativistic Fermi gas model quasielastic, $\Delta$ resonance, higher resonance processes. In analysis, elements introduced describe previously...