A5066966612- 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
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Computational Physics and Python Applications
- Photocathodes and Microchannel Plates
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Advanced Optical Sensing Technologies
- Black Holes and Theoretical Physics
- Photonic and Optical Devices
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- solar cell performance optimization
- Semiconductor materials and devices
- Ga2O3 and related materials
- Nuclear physics research studies
- International Science and Diplomacy
- Gyrotron and Vacuum Electronics Research
University of Chicago
2013-2022
Fermi National Accelerator Laboratory
2013-2022
University of Illinois Chicago
2018
Texas A&M University
2008-2017
Incom (United States)
2017
Mitchell Institute
2013-2016
University of Glasgow
2009-2015
National and Kapodistrian University of Athens
2011-2014
University of California, Los Angeles
2012-2014
Children's Defense Fund
2012-2013
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...
This report summarizes the work of Energy Frontier Higgs Boson working group 2013 Community Summer Study (Snowmass). We identify key elements a precision physics program and document potential future experimental facilities as elucidated during Snowmass study. study couplings to gauge boson fermion pairs, double production for self-coupling, its quantum numbers $CP$-mixing in couplings, mass total width, prospects direct searches additional bosons extensions Standard Model. Our includes...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
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...
Large liquid-scintillator-based detectors have proven to be exceptionally effective for low energy neutrino measurements due their good resolution and scalability large volumes. The addition of directional information using Cherenkov light fast timing would enhance the scientific reach these detectors, especially searches neutrino-less double-beta decay. In this paper, we develop a technique extracting particle direction difference in arrival times scintillation light, evaluate several...
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...
The recent development of Water-based Liquid Scintillator (WbLS), and the concurrent high-efficiency high-precision-timing light sensors, has opened up possibility for a new kind large-scale detector capable very broad program physics. would include determination neutrino mass hierarchy observation CP violation with long-baseline neutrinos, searches proton decay, ultra-precise solar measurements, geo- supernova neutrinos including diffuse antineutrinos, neutrinoless double beta decay. We...
The Large Area Picosecond PhotoDetector (LAPPD) Collaboration was formed in 2009 to develop large-area photodetectors capable of time resolutions measured pico-seconds, with accompanying sub-millimeter spatial resolution. During the next three and one-half years developed LAPPD design 20 x cm modules gains greater than $10^7$ non-uniformity less $15\%$, resolution 50 psec for single photons 700~microns both lateral dimensions. We describe R\&D performed micro-channel plate glass...
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...
The R&D mission of the Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is described in detail. ANNIE is: (1) an important measurement neutrino-nucleus interactions focusing specifically on neutron production, and (2) effort focused using new photodetector technology chemical additives to make advanced water-base neutrino detectors. experiment consists a small Water Cherenkov detector, instrumented with both conventional photomultiplier tubes (PMTs) Large Area Picosecond...
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...