M. T. Hedges
A5085671452- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Advanced Semiconductor Detectors and Materials
- Semiconductor Quantum Structures and Devices
- Particle accelerators and beam dynamics
- Air Quality and Health Impacts
- Muon and positron interactions and applications
- Distributed and Parallel Computing Systems
- Astrophysics and Cosmic Phenomena
- Nuclear physics research studies
- Advanced Optical Imaging Technologies
- Literacy, Media, and Education
- Energy and Environment Impacts
- Interactive and Immersive Displays
Fermi National Accelerator Laboratory
2024-2025
Imperial College London
2021-2024
Purdue University West Lafayette
2021-2023
University of Hawaiʻi at Mānoa
2013-2022
University of Hawaii System
2012-2022
MRC Centre for Environment and Health
2021
University of Calgary
2014
We present a measurement of angular observables and test lepton flavor universality in the $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ decay, where $\ensuremath{\ell}$ is either $e$ or $\ensuremath{\mu}$. The analysis performed on data sample corresponding to an integrated luminosity $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ containing $772\ifmmode\times\else\texttimes\fi{}1{0}^{6}$ $B\overline{B}$ pairs, collected at...
We present measurements of the branching fractions for decays $B\to K \mu^{+}\mu^{-}$ and e^{+}e^{-}$, their ratio ($R_{K}$), using a data sample 711 $fb^{-1}$ that contains $772 \times 10^{6}$ $B\bar{B}$ events. The were collected at $\Upsilon(4S)$ resonance with Belle detector KEKB asymmetric-energy $e^{+}e^{-}$ collider. $R_{K}$ is measured in five bins dilepton invariant-mass-squared ($q^{2}$): $q^{2} \in (0.1, 4.0), (4.0, 8.12), (1.0, 6.0)$, $(10.2, 12.8)$ ($>14.18) GeV^{2}/c^{4}$,...
Using the entire Belle data sample of 980 ${\rm fb}^{-1}$ $e^+e^-$ collisions, we present results a study excited $\Omega_c$ charmed baryons in decay mode $\Xi_c^+K^-$. We show confirmation four five narrow states reported by LHCb Collaboration: $\Omega_c(3000)$ , $\Omega_c(3050)$, $\Omega_c(3066)$, and $\Omega_c(3090)$.
We present a measurement of the differential shapes exclusive $B\ensuremath{\rightarrow}{D}^{*}\ensuremath{\ell}{\overline{\ensuremath{\nu}}}_{\ensuremath{\ell}}$ ($B={B}^{\ensuremath{-}},{\overline{B}}^{0}$ and $\ensuremath{\ell}=e$, $\ensuremath{\mu}$) decays with hadronic tag-side reconstruction for full $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ Belle dataset. extract Caprini-Lellouch-Neubert (CLN) Boyd-Grinstein-Lebed (BGL) form factor parameters use an external input absolute...
Received 25 April 2018DOI:https://doi.org/10.1103/PhysRevD.97.099902© 2018 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasFlavor changing neutral currentsParticle decaysParticle interactionsParticles & Fields
We measure the ratio of branching fractions for $Υ(4S)$ decays to $B^+B^-$ and $B^0\bar{B}{}^0$ using $B^+ \rightarrow J/ψ(\ell\ell) K^+$ $B^0 K^0$ samples, where $J/ψ(\ell\ell)$ stands $J/ψ\to \ell^+\ell^-$ ($\ell = e$ or $μ$), with $711$ fb$^{-1}$ data collected at resonance Belle detector. find decay rate $Υ(4S) B^+B^-$ over B^0\bar{B}{}^0$ be $1.065\pm0.012\pm 0.019 \pm 0.047$, which is most precise measurement date. The first second uncertainties are statistical systematic,...
We report the first observation of $$\Xi _{c}(2930)^0$$ charmed-strange baryon with a significance greater than 5 $$\sigma $$ . The is found in its decay to $$K^- \Lambda _{c}^+$$ $$B^{-} \rightarrow K^{-} _{c}^{+} \bar{\Lambda }_{c}^{-}$$ decays. measured mass and width are $$[2928.9 \pm 3.0(\mathrm stat.)^{+0.9}_{-12.0}(\mathrm syst.)]$$ MeV/ $$c^{2}$$ $$[19.5 8.4(\mathrm stat.) ^{+5.9}_{-7.9}(\mathrm MeV, respectively, product branching fraction $$\mathcal{B}(B^{-} \Xi _{c}(2930)^0...
We report a study of the decay D^{0}→K_{S}^{0}K_{S}^{0} using 921 fb^{-1} data collected at or near ϒ(4S) and ϒ(5S) resonances with Belle detector KEKB asymmetric energy e^{+}e^{-} collider. The measured time-integrated CP asymmetry is A_{CP}(D^{0}→K_{S}^{0}K_{S}^{0})=(-0.02±1.53±0.02±0.17)%, branching fraction B(D^{0}→K_{S}^{0}K_{S}^{0})=(1.321±0.023±0.036±0.044)×10^{-4}, where first uncertainty statistical, second systematic, third due to normalization mode (D^{0}→K_{S}^{0}π^{0}). These...
Using a sample of $771.6\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\mathrm{\ensuremath{\Upsilon}}\mathrm{\ensuremath{\Upsilon}}(4S)$ decays collected by the Belle experiment at KEKB ${e}^{+}{e}^{\ensuremath{-}}$ collider, we observe, for first time, transition $\mathrm{\ensuremath{\Upsilon}}(4S)\ensuremath{\rightarrow}\ensuremath{\eta}{h}_{b}(1P)$ with branching fraction...
We present a study of the X(3872) lineshape in decay B→X(3872)K→D0¯D*0K using data sample 772×106 B¯B pairs collected at Υ(4S) resonance with Belle detector KEKB asymmetric-energy e+e− collider. The peak near threshold D0¯D*0 invariant mass spectrum is fitted relativistic Breit-Wigner lineshape. determine and width parameters to be mBW=3873.71+0.56−0.50(stat)±0.13(syst) MeV/c2 ΓBW=5.2+2.2−1.5(stat)±0.4(syst) MeV, respectively. branching fraction found...
A bstract We report a measurement of the electric dipole moment τ lepton ( dτ ) using an 833 fb − 1 data sample collected near Υ(4 S resonance, with Belle detector at KEKB asymmetric-energy e + collider. Using optimal observable method, we obtain real and imaginary parts d as Re( = 0 . 62 ± 63) × 10 17 cm Im( 40 32) cm, respectively. These results are consistent null present level experimental sensitivity improve by about factor three.
We present a study of singly Cabibbo-suppressed decay Λ+c→pK0SK0S and Cabibbo-favored Λ+c→pK0Sη based on 980 fb−1 data collected by the Belle detector, operating at KEKB energy-asymmetric e+e− collider. measure their branching fractions relative to Λ+c→pK0S: B(Λ+c→pK0SK0S)/B(Λ+c→pK0S)=(1.48±0.08±0.04)×10−2 B(Λ+c→pK0Sη)/B(Λ+c→pK0S)=(2.73±0.06±0.13)×10−1. Combining with world average B(Λ+c→pK0S), we have absolute fractions, B(Λ+c→pK0SK0S)=(2.35±0.12±0.07±0.12)×10−4...
Using the data sample of 980 fb−1 collected with Belle detector operating at KEKB asymmetric-energy e+e− collider, we present results an investigation Λπ+ and Λπ− invariant mass distributions looking for substructure in decay Λ+c→Λπ+π+π−. We find a significant signal each distribution. When interpreted as resonances, (Λπ−) combination 1434.3±0.6(stat)±0.9(syst) MeV/c2 [1438.5±0.9(stat)±2.5(syst) MeV/c2], intrinsic width 11.5±2.8(stat)±5.3(syst) [33.0±7.5(stat)±23.6(syst) MeV/c2] significance...
The processes e+e−→Σ0¯Σ0 and e+e−→Σ+¯Σ− are studied using initial-state-radiation events in a sample of 980 fb−1 collected with the Belle detector at KEKB asymmetric-energy e+e− collider. cross sections from mass threshold to 3 GeV/c2 effective form factors Σ0 Σ+ measured. In charmonium region, we observe decays J/ψ→Σ0¯Σ0 J/ψ→Σ+¯Σ− determine respective branching fractions.8 MoreReceived 31 October 2022Accepted 28 March 2023DOI:https://doi.org/10.1103/PhysRevD.107.072008Published by American...
We report a search for heavy neutral lepton (HNL) that mixes predominantly with <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>ν</a:mi><a:mi>τ</a:mi></a:msub></a:math>. The utilizes data collected the Belle detector at KEKB asymmetric energy <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>e</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>e</c:mi><c:mo>−</c:mo></c:msup></c:math> collider. sample was and just below...
We measure the complete set of angular coefficients <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msub><a:mi>J</a:mi><a:mi>i</a:mi></a:msub></a:math> for exclusive <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mover accent="true"><c:mrow><c:mi>B</c:mi></c:mrow><c:mrow><c:mo stretchy="false">¯</c:mo></c:mrow></c:mover><c:mo...