D. Brailsford
A5071449593- 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
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Planetary Science and Exploration
- Mass Spectrometry Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Nuclear physics research studies
- Computational Physics and Python Applications
- CCD and CMOS Imaging Sensors
- Laser Design and Applications
- Advanced Optical Sensing Technologies
- Atomic and Molecular Physics
- Noncommutative and Quantum Gravity Theories
Lancaster University
2015-2024
Lancaster City Council
2018-2024
Joint Institute for Nuclear Research
2021
Imperial College London
2013-2017
The T2K experiment has observed electron neutrino appearance in a muon beam produced 295 km from the Super-Kamiokande detector with peak energy of 0.6 GeV. A total 28 events were detected an distribution consistent signal, corresponding to significance 7.3σ when compared 4.92±0.55 expected background events. In Pontecorvo-Maki-Nakagawa-Sakata mixing model, signal depends on several parameters including three angles θ12, θ23, θ13, mass difference Δm232 and CP violating phase δCP. this...
The preponderance of matter over antimatter in the early universe, dynamics supernovae that produced heavy elements necessary for life, and whether protons eventually decay—these mysteries at forefront particle physics astrophysics are key to understanding evolution our its current state, eventual fate. Deep Underground Neutrino Experiment (DUNE) is an international world-class experiment dedicated addressing these questions as it searches leptonic charge-parity symmetry violation, stands...
We report on measurements of neutrino oscillation using data from the T2K long-baseline experiment collected between 2010 and 2013. In an analysis muon disappearance alone, we find following estimates 68% confidence intervals for two possible mass hierarchies: Normal Hierarchy: $\sin^2\theta_{23}=0.514^{+0.055}_{-0.056}$ $\Delta m^2_{32}=(2.51\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ Inverted $\sin^2\theta_{23}=0.511\pm0.055$ m^2_{13}=(2.48\pm0.10)\times The accounts multi-nucleon mechanisms in...
The T2K experiment measures muon neutrino disappearance and electron appearance in accelerator-produced antineutrino beams. With an exposure of 14.7(7.6)×1020 protons on target the (antineutrino) mode, 89 νe candidates seven anti-νe are observed, while 67.5 9.0 expected for δCP=0 normal mass ordering. obtained 2σ confidence interval CP-violating phase, δCP, does not include CP-conserving cases (δCP=0, π). best-fit values other parameters sin2θ23=0.526+0.032−0.036 Δm232=2.463+0.071−0.070×10−3...
New data from the T2K neutrino oscillation experiment produce most precise measurement of mixing parameter ${\ensuremath{\theta}}_{23}$. Using an off-axis beam with a peak energy 0.6 GeV and set corresponding to $6.57\ifmmode\times\else\texttimes\fi{}1{0}^{20}$ protons on target, has fit energy-dependent ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ probability determine parameters. The 68% confidence limit ${\mathrm{sin}}^{2}({\ensuremath{\theta}}_{23})$ is...
The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection far detector simulation parameterized analysis near detector. Detailed uncertainties due flux prediction, interaction model, effects are included. DUNE will resolve mass ordering precision 5$\sigma$, for all $\delta_{\mathrm{CP}}$ values, after 2 years running with nominal design beam configuration. It has potential observe...
The preponderance of matter over antimatter in the early universe, dynamics supernovae that produced heavy elements necessary for life, and whether protons eventually decay—these mysteries at forefront particle physics astrophysics are key to understanding evolution our its current state, eventual fate. DUNE is an international world-class experiment dedicated addressing these questions as it searches leptonic charge-parity symmetry violation, stands ready capture supernova neutrino bursts,...
The Deep Underground Neutrino Experiment (DUNE), a 40-kton underground liquid argon time projection chamber experiment, will be sensitive to the electron-neutrino flavor component of burst neutrinos expected from next Galactic core-collapse supernova. Such an observation bring unique insight into astrophysics core collapse as well properties neutrinos. general capabilities DUNE for neutrino detection in relevant few- few-tens-of-MeV energy range described. As example, DUNE's ability...
Abstract The ICARUS liquid argon time projection chamber (LArTPC) neutrino detector has been taking physics data since 2022 as part of the Short-Baseline Neutrino (SBN) Program. This paper details equalization response to charge in (TPC), well data-driven tuning simulation ionization signals and electronics noise. procedure removes non-uniformities TPC space time. work leverages copious number cosmic ray muons available at surface. signal shape applies a novel that tunes match what is...
T2K reports its first results in the search for CP violation neutrino oscillations using appearance and disappearance channels neutrino- antineutrino-mode beams. The data include all runs from January 2010 to May 2016 comprise 7.482×10^{20} protons on target mode, which yielded far detector 32 e-like 135 μ-like events, 7.471×10^{20} antineutrino 4 66 events. Reactor measurements of sin^{2}2θ_{13} have been used as an additional constraint. one-dimensional confidence interval at 90% phase...
The T2K collaboration: reports evidence for electron neutrino appearance at the atmospheric mass splitting, |\Delta m_{32}^2|=2.4x10^{-3} eV^2. An excess of interactions over background is observed from a muon beam with peak energy 0.6 GeV Super-Kamiokande (SK) detector 295 km beam's origin. Signal and predictions are constrained by data near detectors located 280 m production target. We observe 11 candidate events SK when 3.3\pm0.4(syst.) expected. background-only hypothesis rejected...
The T2K experiment reports an updated analysis of neutrino and antineutrino oscillations in appearance disappearance channels. A sample electron candidates at Super-Kamiokande which a pion decay has been tagged is added to the four single-ring samples used previous oscillation analyses. Through combined analyses these five samples, simultaneous measurements parameters, $|\Delta m^2_{32}|$, $\sin^2(\theta_{23})$, $\sin^2(\theta_{13})$, $\delta_{CP}$ mass ordering are made. set studies...
T2K has performed the first measurement of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ inclusive charged current interactions on carbon at neutrino energies $\ensuremath{\sim}1\text{ }\text{ }\mathrm{GeV}$ where is reported as a flux-averaged double differential cross section in muon momentum and angle. The flux predicted by beam Monte Carlo external data, including results from NA61/SHINE experiment. data used for this were taken 2010 2011, with total...
We report the measurement of muon neutrino charged-current interactions on carbon without pions in final state at T2K beam energy using $5.734\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons target. For first time is reported as a flux-integrated, double-differential cross section kinematic variables ($\mathrm{cos}{\ensuremath{\theta}}_{\ensuremath{\mu}}$, ${p}_{\ensuremath{\mu}}$), correcting for events where pion produced and then absorbed by interactions. Two analyses are performed...
This paper reports measurements of final-state proton multiplicity, muon and kinematics, their correlations in charged-current pionless neutrino interactions, measured by the T2K ND280 near detector its plastic scintillator (C8H8) target. The data were taken between years 2010 2013, corresponding to approximately 6×1020 protons on Thanks exploration kinematics imbalances results offer a novel probe nuclear-medium effects most pertinent (sub-)GeV neutrino-nucleus interactions that are used...
This paper reports on the search for heavy neutrinos with masses in range $140 < M_N 493$ MeV/c$^2$ using off-axis near detector ND280 of T2K experiment. These particles can be produced from kaon decays standard neutrino beam and then subsequently decay ND280. The modes under consideration are $N \to \ell^{\pm}_{\alpha} \pi^{\mp}$ \ell^+_{\alpha} \ell^-_{\beta} \nu (\bar\nu)$ ($\alpha,\beta=e,\mu$). A such events has been made Time Projection Chambers ND280, where background reduced to less...
The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis beam peak energy 0.6 GeV. Near detector measurements are used to constrain the flux and cross section parameters. Super-Kamiokande far detector, which is 295 km downstream production target, collected data corresponding $3.01\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target. In absence oscillations, $205\ifmmode\pm\else\textpm\fi{}17$ (syst) events expected be detected while...
ProtoDUNE-SP is the single-phase DUNE Far Detector prototype that under construction and will be operated at CERN Neutrino Platform (NP) starting in 2018. ProtoDUNE-SP, a crucial part of effort towards first 10-kt fiducial mass far detector module (17 kt total LAr mass), significant experiment its own right. With liquid argon (LAr) 0.77 kt, it represents largest monolithic LArTPC to built date. It's technical design given this report.
A description of the proposed detector(s) for DUNE at LBNF
The observation of the recent electron neutrino appearance in a muon beam and high-precision measurement mixing angle |$\theta _{13}$| have led to re-evaluation physics potential T2K long-baseline oscillation experiment. Sensitivities are explored for CP violation neutrinos, non-maximal |$\sin ^22\theta _{23}$|, octant mass hierarchy, addition measurements |$\delta _{{\rm CP}}$|, ^2\theta |$\Delta m^2_{32}$|, various combinations |$\nu$|-mode |$\bar {\nu }$|-mode data-taking. With an...
In this document, we present the Technical Design Report of Upgrade T2K Near Detector ND280. The goal upgrade is to improve performance measure neutrino interaction rate and constrain cross-sections so that uncertainty in number predicted events at Super-Kamiokande reduced about 4%. This will allow physics reach T2K-II project. achieved by modifying upstream part detector, adding a new highly granular scintillator detector (Super-FGD), two TPCs (High-Angle TPC) six TOF planes. Details...
Abstract The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for variety of physics topics. high-intensity proton beams provide large neutrino flux, sampled by near detector system consisting combination capable precision detectors, and the massive far located deep underground. This configuration sets up DUNE as machine discovery, it enables opportunities not only to perform measurements that may uncover deviations from present three-flavor mixing paradigm, but also...
The T2K off-axis near detector, ND280, is used to make the first differential cross-section measurements of electron neutrino charged current interactions at energies ~1 GeV as a function momentum, scattering angle and four-momentum transfer interaction. total flux-averaged $\nu_e$ on carbon measured be $1.11\pm0.09~(stat)\pm0.18~(syst)\times10^{-38} cm^2/nucleon$. agree with predictions two leading interaction generators, NEUT GENIE. prediction $1.23\times10^{-38} cm^2/nucleon$ GENIE...
The Deep Underground Neutrino Experiment is a next-generation neutrino oscillation experiment that aims to measure $CP$-violation in the sector as part of wider physics program. A deep learning approach based on convolutional neural network has been developed provide highly efficient and pure selections electron muon charged-current interactions. (antineutrino) selection efficiency peaks at 90% (94%) exceeds 85% (90%) for reconstructed energies between 2-5 GeV. event found have maximum 96%...