R. C. Edgar
A5072487071- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Distributed and Parallel Computing Systems
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Astrophysics and Cosmic Phenomena
- Structural Analysis of Composite Materials
- Pulsed Power Technology Applications
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Planetary Science and Exploration
- Medical Imaging Techniques and Applications
- Electric Motor Design and Analysis
- Nuclear Physics and Applications
- Safety Warnings and Signage
- Islamic Thought and Society Studies
University of Michigan
2014-2023
UK Power Networks
2023
Max Planck Institute for Physics
2019
The University of Adelaide
2015-2017
Iowa State University
2015-2016
Universitatea Națională de Știință și Tehnologie Politehnica București
2016
Ann Arbor Center for Independent Living
2013-2015
University of Birmingham
2015
National Agency for New Technologies, Energy and Sustainable Economic Development
2014
University of Glasgow
2013
The mass of the W boson, a mediator weak force between elementary particles, is tightly constrained by symmetries standard model particle physics. Higgs boson was last missing component model. After observation measurement provides stringent test We measure mass, MW, using data corresponding to 8.8 inverse femtobarns integrated luminosity collected in proton-antiproton collisions at 1.96 tera-electron volt center-of-mass energy with CDF II detector Fermilab Tevatron collider. A sample...
We present new measurements of the inclusive forward-backward ttbar production asymmetry, AFB, and its dependence on several properties system. The are performed with full Tevatron data set recorded CDF II detector during ppbar collisions at sqrt(s) = 1.96 TeV, corresponding to an integrated luminosity 9.4 fb^(-1). measure asymmetry using rapidity difference Delta-y=y_(t)-y_(tbar). Parton-level results derived, yielding 0.164+/-0.047 (stat + syst). observe a linear AFB top-quark pair mass...
Using the full CDF Run II data sample, we report evidence for a new resonance, which refer to as $B(5970)$, found simultaneously in ${B}^{0}{\ensuremath{\pi}}^{+}$ and ${B}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ mass distributions with significance of 4.4 standard deviations. We further first study resonances consistent orbitally excited ${B}^{+}$ mesons an updated measurement properties ${B}^{0}$ ${B}_{s}^{0}$ mesons. measure masses widths all states, well relative production rates...
We report final measurements of direct CP-violating asymmetries in charmless decays neutral bottom hadrons to pairs charged with the upgraded Collider Detector at Fermilab Tevatron. Using complete √s=1.96 TeV proton-antiproton collisions data set, corresponding 9.3 fb⁻¹ integrated luminosity, we measure A(Λ(b)⁰→pπ⁻)=+0.06±0.07(stat)±0.03(syst) and A(Λ(b)⁰→pK⁻)=-0.10±0.08(stat)±0.04(syst), compatible no asymmetry. In addition B(s)⁰→K⁻π⁺ B⁰→K⁺π⁻ be A(B(s)⁰→K⁻π⁺)=+0.22±0.07(stat)±0.02(syst)...
We measure the inclusive forward--backward asymmetry of charged-lepton pseudorapidities from top-quark pairs produced in proton--antiproton collisions and decaying to final states that contain two charged leptons (electrons or muons). The data are collected with Collider Detector at Fermilab correspond an integrated luminosity $9.1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. leptonic asymmetry, ${A}_{\mathrm{FB}}^{\ensuremath{\ell}}$, be $0.072\ifmmode\pm\else\textpm\fi{}0.060$ pair...
Using data from proton-antiproton collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ recorded by the CDF II detector Fermilab Tevatron, evidence for excited resonance state ${\ensuremath{\Lambda}}_{b}^{*0}$ is presented in its ${\ensuremath{\Lambda}}_{b}^{0}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay followed ${\ensuremath{\Lambda}}_{b}^{0}\ensuremath{\rightarrow}{\ensuremath{\Lambda}}_{c}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and...
A search for the exotic meson $X(5568)$ decaying into $B^0_s \pi^{\pm}$ final state is performed using data corresponding to $9.6 \textrm{fb}^{-1}$ from $p{\bar p}$ collisions at $\sqrt{s} = 1960$ GeV recorded by Collider Detector Fermilab. No evidence this found and an upper limit of 6.7\% 95\% confidence level set on fraction $B^0_s$ produced through $X(5568) \rightarrow B^0_s \, process.
We measure the asymmetry in charge-weighted rapidity $q{y}_{\ensuremath{\ell}}$ of lepton semileptonic $t\overline{t}$ decays recorded with CDF II detector using full Tevatron Run sample, corresponding to an integrated luminosity $9.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. A parametrization as a function is used correct for finite acceptance and recover production-level asymmetry. The result ${A}_{\mathrm{FB}}^{\ensuremath{\ell}}={0.094}_{\ensuremath{-}0.029}^{+0.032}$ be compared...
We present a measurement of the total decay width top quark using events with top-antitop-quark pair candidates reconstructed in final state one charged lepton and four or more hadronic jets. use full Tevatron Run II data set $\sqrt{s} = 1.96$ TeV proton-antiproton collisions recorded by CDF detector. The top-quark mass hadronically-decaying $W$ boson are for each event compared distributions derived from simulated signal background samples to extract (\gmt) energy scale calorimeter jets...
This Letter reports a measurement of the cross section for producing pairs central prompt isolated photons in proton-antiproton collisions at total energy 1.96 TeV using data corresponding to 9.5/fb integrated luminosity collected with CDF II detector Fermilab Tevatron. The measured differential is compared three calculations derived from theory strong interactions. These include prediction based on leading order matrix element calculation merged parton shower, next-to-leading order, and...
We study charged particle production in proton-antiproton collisions at 300 GeV, 900 and 1.96 TeV. use the direction of with largest transverse momentum each event to define three regions eta-phi space; toward, away, transverse. The average number scalar pT sum particles region are sensitive modeling underlying event. is divided into a MAX MIN region, which helps separate hard component (initial final-state radiation) from beam-beam remnant multiple parton interaction components scattering....
We measure the time dependence of ratio decay rates for D0 -> K+ pi- to Cabibbo-favored K- pi+. The charge conjugate decays are included. A signal 3.3 x 10^4 D*+ pi+ D0, is obtained with proper times between 0.75 and 10 mean lifetimes. data were recorded CDF II detector at Fermilab Tevatron correspond an integrated luminosity 9.6 fb-1 p-pbar collisions sqrt(s) = 1.96 TeV. Assuming CP conservation, we search D0-D0bar mixing parameters be R_D (3.51 +/- 0.35) 10^{-3}, y' (4.3 4.3) x'^2 (0.08...
We present a combination of searches for the standard model Higgs boson using full CDF run II data set, which corresponds to an integrated luminosity $9.45--10.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected from $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ $p\overline{p}$ collisions at Fermilab Tevatron. The consider production gluon-gluon fusion, vector-boson and associated with either $W$ or $Z$ $t\overline{t}$ pair. Depending on mode, decays ${W}^{+}{W}^{\ensuremath{-}}$, $ZZ$,...
This Letter reports a search for narrow resonant state decaying into two W bosons and b quarks where one boson decays leptonically the other quark-antiquark pair. The is particularly sensitive to top-antitop production. We use full data sample of proton-antiproton collisions at center-of-mass energy 1.96 TeV collected by CDF II detector Fermilab Tevatron, corresponding an integrated luminosity 9.45 fb(-1). No evidence production found, upper limits on cross section times branching ratio are...
We report on mass and lifetime measurements of several ground state charmed bottom baryons, using a data sample corresponding to $9.6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ from $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ recorded with the Collider Detector Fermilab. Baryon candidates are reconstructed collected an online event selection designed for collection long-lifetime heavy-flavor decay products second collect...
We present a search for the pair production of narrow nonstandard-model strongly interacting particle that decays to quarks or gluons, leading final state with four hadronic jets. consider both nonresonant via an intermediate gluon as well resonant distinct particle. use data collected by CDF experiment in proton-antiproton collisions at √[s]=1.96 TeV corresponding integrated luminosity 6.6 fb(-1). find be consistent production. report limits on σ(pp[over ¯]→jjjj) function masses...
We measure exclusive $\pi^+\pi^-$ production in proton-antiproton collisions at center-of-mass energies $\sqrt{s}$ = 0.9 and 1.96 TeV the Collider Detector Fermilab. select events with two oppositely charged particles, assumed to be pions, pseudorapidity $|\eta| < 1.3$ no other particles detected 5.9$. require system have rapidity $|y|<$ 1.0. The mechanism of these is expected dominated by double pomeron exchange, which constrains quantum numbers central state. data are potentially valuable...
We report a measurement of the differential cross section $d\ensuremath{\sigma}/d(\mathrm{cos}{\ensuremath{\theta}}_{t})$ for top-quark pair production as function angle in proton-antiproton collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$. This is performed using data collected with CDF II detector Tevatron, corresponding to an integrated luminosity $9.4\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. employ Legendre polynomials characterize shape parton level. The observed coefficients...
Drell-Yan lepton pairs are produced in the process pp¯→μ+μ−+X through an intermediate γ*/Zboson. The forward-backward asymmetry polar-angle distribution of μ− as a function invariant mass μ+μ− pair is used to obtain effective leptonic determination sin2θefflept electroweak-mixing parameter sin2θW, from which value sin2θW derived assuming standard model. measurement sample, recorded by Collider Detector at Fermilab (CDF), corresponds 9.2 fb−1 integrated luminosity pp¯ collisions...
Drell-Yan lepton pairs are produced in the process $p\overline{p}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}+X$ through an intermediate ${\ensuremath{\gamma}}^{*}/Z$ boson. The angular distributions used to provide information on electroweak-mixing parameter ${sin}^{2}{\ensuremath{\theta}}_{W}$ via its observable effective-leptonic ${sin}^{2}{\ensuremath{\theta}}_{W}$, or ${sin}^{2}{\ensuremath{\theta}}_{\mathrm{eff}}^{\mathrm{lept}}$. A new method infer or, equivalently,...
We report on a measurement of the top-quark electric charge in $t\overline{t}$ events which one $W$ boson originating from pair decays into leptons and other hadrons. The event sample was collected by CDF II detector $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ proton-antiproton collisions corresponds to $5.6\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. find data be consistent with standard model exclude existence an exotic quark $\ensuremath{-}4/3$ mass conventional top at 99% confidence level.
We report evidence for s-channel single-top-quark production in proton-antiproton collisions at center-of-mass energy sqrt[s] = 1.96 TeV using a data set that corresponds to an integrated luminosity of 9.4 fb(-1) collected by the Collider Detector Fermilab. select events consistent with process including two jets and one leptonically decaying W boson. The observed significance is 3.8 standard deviations respect background-only prediction. Assuming top-quark mass 172.5 GeV/c(2), we measure...
A search for forbidden and exotic Z boson decays in the diphoton mass spectrum is presented first time hadron collisions, based on data corresponding to 10.0 fb(-1) of integrated luminosity from proton-antiproton collisions at √s = 1.96 TeV collected by CDF experiment. No evidence signal observed, 95% credibility level Bayesian upper limits are set branching ratios a photon neutral pion (which detected as photon), pair photons, pions. The observed ratio 2.01 × 10(-5) → π(0)γ, 1.46 γγ, 1.52...
The New Small Wheel (NSW) is an upgrade for the ATLAS detector to provide enhanced triggering and reconstruction of muons in forward region. large LV power demands NSW necessitate a point-of-load architecture with on-detector conversion. radiation load magnetic field this environment, while significant, are nevertheless still range where commercial-off-the-shelf devices may suffice.