V. W. S. Wong
A5103279624- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Hepatitis C virus research
- Liver Disease Diagnosis and Treatment
- Particle Accelerators and Free-Electron Lasers
- Hepatitis B Virus Studies
- Structural Analysis of Composite Materials
- Big Data Technologies and Applications
- Inflammatory Bowel Disease
- Engineering and Materials Science Studies
- Edcuational Technology Systems
- Liver Diseases and Immunity
- Muon and positron interactions and applications
University of British Columbia
2016-2024
TRIUMF
2022-2024
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2024
Roma Tre University
2024
The University of Adelaide
2017-2023
European Organization for Nuclear Research
2023
University of Victoria
2021
Ochanomizu University
2020
Otsuka (Japan)
2020
Oklahoma State University
2019
PennyLane is a Python 3 software framework for differentiable programming of quantum computers. The library provides unified architecture near-term computing devices, supporting both qubit and continuous-variable paradigms. PennyLane's core feature the ability to compute gradients variational circuits in way that compatible with classical techniques such as backpropagation. thus extends automatic differentiation algorithms common optimization machine learning include hybrid computations. A...
Patients with chronic hepatitis C virus (HCV) infection are often asymptomatic few clinical signs of liver disease. Recognition the presence fibrosis or cirrhosis is difficult without biopsy, but availability effective treatments, such as interferon, and potential for progression to hepatoma in some cases, an accurate measure stage disease important. Serum hyaluronic acid (HA) has been identified a marker other settings. In prospective study 130 HCV carriers therefore, serum HA...
A sample of 3984 candidates the K+→π+γγ decay, with an estimated background 291±14 events, was collected by NA62 experiment at CERN during 2017–2018. In order to describe observed di-photon mass spectrum, next-to-leading contribution in chiral perturbation theory found be necessary. The decay branching ratio full kinematic range is measured (9.61±0.17)×10−7. first search for production and prompt axion-like particle gluon coupling process K+→π+a, a→γγ also reported.
A bstract measurement of the $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>π</mml:mi> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> decay by NA62 experiment at CERN SPS is presented, using data collected in 2021 and 2022. This dataset was recorded, after modifications to beamline detectors, a higher instantaneous beam...
AIMS: To study the inter-relation between hepatic fibrosis and other histological features of chronic hepatitis C virus (HCV) infection. METHODS: Liver biopsy specimens from 200 consecutive patients with HCV infection were graded staged separately for necro-inflammatory activity fibrosis. The interaction was evaluated by univariate multivariate analysis, followed hierarchical log linear modelling. RESULTS: most striking feature presence portal tract inflammation in 177 (89%) samples....
Searches for lepton number violating K+→π−e+e+ and K+→π−π0e+e+ decays have been performed using the complete dataset collected by NA62 experiment at CERN in 2016–2018. Upper limits of 5.3×10−11 8.5×10−10 are obtained on decay branching fractions 90% confidence level. The former result improves a factor four over previous best limit, while latter represents first limit rate.
A bstract sample of 1 . 3 × 10 5 K + → π 0 e νγ candidates with less than 1% background was collected by the NA62 experiment at CERN SPS in 2017–2018. Branching fraction measurements are obtained percent relative precision three restricted kinematic regions, improving on existing results a factor larger two. An asymmetry, possibly related to T-violation, is investigated no evidence observed within achieved precision.
A sample of $2.8 \times 10^4$ $K^{+} \to \pi^{+} \mu^{+} \mu^{-}$ candidates with negligible background was collected by the NA62 experiment at CERN SPS in 2017--2018. The model-independent branching fraction is measured to be $(9.15 \pm 0.08)\times 10^{-8}$, a factor three more precise than previous measurements. decay form presented as function squared dimuon mass. measurement parameters and their uncertainties performed using description based on Chiral Perturbation Theory $\mathcal{O}(p^6)$.
A search for the $K^+\to\mu^-\nu e^+e^+$ decay, forbidden within Standard Model by either lepton number or flavour conservation depending on of emitted neutrino, has been performed using dataset collected NA62 experiment at CERN in 2016--2018. An upper limit $8.1\times 10^{-11}$ is obtained decay branching fraction 90% CL, improving a factor 250 over previous search.
A bstract The NA62 experiment at CERN, designed to study the ultra-rare decay K + → π $$ \nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> , has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. search for decaying flight μ − pairs is reported, based sample of 1 . 4 × 10 17...
A timely and long-term programme of kaon decay measurements at a new level precision is presented, leveraging the capabilities CERN Super Proton Synchrotron (SPS). The proposed firmly anchored on experience built up studying decays SPS over past four decades, includes rare processes, CP violation, dark sectors, symmetry tests other Standard Model. experimental based staged approach involving experiments with charged neutral beams, as well operation in beam-dump mode. various phases will rely...
A bstract The NA62 experiment at CERN targets the measurement of ultra-rare $$ {K}^{+}\to {\pi}^{+}\nu \overline{\nu} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>→</mml:mo> <mml:mi>π</mml:mi> <mml:mi>ν</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> decay, and carries out a broad physics programme that includes probes for symmetry violations searches exotic particles. Data were collected in...
We used the human atrial natriuretic peptide (hANP) gene as a model to investigate causal relationship between immediate early expression and subsequent activation of embryonic repertoire in cardiac hypertrophy. Using transient transfection analysis, we found that overexpression individual Jun family members, alone or combination, displayed unique activity varied function promoter nature transfected myocyte populations under examination. In neonatal ventriculocytes, both c-jun lesser extent,...
The first search for ultra-rare K+ decays into the π+e+e−e+e− final state is reported, using a dataset collected by NA62 experiment at CERN in 2017–2018. An upper limit of 1.4×10−8 90% CL obtained branching ratio K+→π+e+e−e+e− decay, predicted Standard Model to be (7.2±0.7)×10−11. Upper limits are level 10−9 ratios two prompt decay chains involving pair-production hidden-sector mediators: K+→π+aa, a→e+e− and K+→π+S, S→A′A′, A′→e+e−.
A sample of 2.8⇥10 4 K + !⇡ µ candidates with negligible background was collected by the NA62 experiment at CERN SPS in 2017-2018.The model-independent branching fraction is measured to be (9.15 ± 0.08) ⇥ 10 8 , a factor three more precise than previous measurements.The decay form presented as function squared dimuon mass.A measurement parameters and their uncertainties performed using description based on Chiral Perturbation Theory O(p 6 ).
The NA62 experiment at CERN, designed to study the ultra-rare decay $K^+ \to \pi^+\nu\overline{\nu}$, has also collected data in beam-dump mode. In this configuration, dark photons may be produced by protons dumped on an absorber and reach a volume beginning 80 m downstream. A search for decaying flight $\mu^+\mu^-$ pairs is reported, based sample of $1.4 \times 10^{17}$ dump 2021. No evidence photon signal observed. region parameter space excluded 90% CL, improving previous experimental...
Abstract The NA62 experiment at CERN utilises a differential Cherenkov counter with achromatic ring focus (CEDAR) for tagging kaons within an unseparated monochromatic beam of charged hadrons. CEDAR-H detector was developed to minimise the amount material in path by using hydrogen gas as radiator medium. shown satisfy kaon requirements test-beam before installation and commissioning experiment. performance measured data collected 2023.
The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays flight to electron-positron pairs using a sample of 1.4×10^{17} protons on dump collected 2021. No evidence signal is observed. combined result searches lepton-antilepton final states presented and region the parameter space excluded 90% confidence level, improving previous experimental limits mass values between 50 600 MeV/c^{2} coupling range 10^{-6} 4×10^{-5}. An interpretation e^{+}e^{-} search...
Chronic hepatitis C results in liver disease, cirrhosis, and hepatocellular carcinoma. Its prevalence is estimated to be 70-92% among intravenous drug misusers,1 who are also at risk of parenterally or sexually transmitted B. Coinfection with B virus may accelerate underlying damage due C.2 Effective vaccines against have been available for a decade.3 Universal vaccination being adopted countries where common. When has targeted promiscuous people misusers uptake suboptimal the incidence...
Variations in solid waste composition data are necessary as inputs to planning, yet uncertainty exists regarding which probability distributions might be generally valuable describe the variability. Twenty-two detailed analyses of from British Columbia, Canada, were fitted using BestFit software. Alternative ranked based on three goodness-of-fit parameters and twelve fractions. The log-logistic distribution was found most able fit over wide range types considered. results demonstrated...
The first search for ultra-rare $K^+$ decays into the $\pi^+e^+e^-e^+e^-$ final state is reported, using a dataset collected by NA62 experiment at CERN in 2017-2018. An upper limit of $1.4\times 10^{-8}$ 90% CL obtained branching ratio $K^+\to\pi^+e^+e^-e^+e^-$ decay, predicted Standard Model to be $(7.2\pm0.7)\times 10^{-11}$. Upper limits are level $10^{-9}$ ratios two prompt decay chains involving pair-production hidden-sector mediators: $K^+\to\pi^+aa$, $a\to e^+e^-$ and $K^+\to\pi^+S$,...