R. M. Harris
A5019847181- 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
- Medical Imaging Techniques and Applications
- Dental Education, Practice, Research
- Black Holes and Theoretical Physics
- Distributed and Parallel Computing Systems
- Dental Health and Care Utilization
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- International Science and Diplomacy
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Scientific Computing and Data Management
- Nuclear reactor physics and engineering
- Criminal Justice and Corrections Analysis
- Radiation Therapy and Dosimetry
- American Constitutional Law and Politics
- Radiation Detection and Scintillator Technologies
- Gas Dynamics and Kinetic Theory
Fermi National Accelerator Laboratory
2016-2025
European Organization for Nuclear Research
2014-2024
A. Alikhanyan National Laboratory
2022-2024
Institute of High Energy Physics
2016-2024
University of Antwerp
2023-2024
Vrije Universiteit Brussel
2023-2024
Virginia Cooperative Extension
2022
Massachusetts Institute of Technology
2021
Duke University
1994-2020
University of North Carolina at Chapel Hill
2020
We present results from searches for the top quark pp\ifmmode\bar\else\textasciimacron\fi{} collisions at Fermilab Tevatron Collider. The data sample was collected during 1988--89 with Collider Detector and has an integrated luminosity of 4.1 ${\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$. Our previous search e\ensuremath{\mu} final states tt\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}e\ensuremath{\nu}b \ensuremath{\mu}\ensuremath{\nu}b\ifmmode\bar\else\textasciimacron\fi{}...
We review the experimental searches for new particles in dijet mass spectrum conducted at CERN SppS, Fermilab Tevatron Collider, and Large Hadron Collider. The theory of QCD background particle signals is reviewed, with emphasis on choices made by experiments to model signal. techniques, data, results resonance hadron colliders over last quarter century are described compared. Model independent specific limits decaying dijets a detailed comparison recently published from ATLAS CMS experiments.
Crossed beam studies of nonreactive scattering K, Rb, and Cs atoms from CCl4, CH3I, SnCl4 have been carried out the differential cross sections compared with calculations based on a phenomenological optical model analysis. The models employed make use parameterized “reference” potential which is intended both to represent multipole expansion surface reactants for internuclear distances greater than radius chemical interaction, provide systematic means calculating real parts phase shifts. A...
Many people with Diabetes live the continuous threat of hypoglycemic attacks and danger going into coma. Alert Dogs are trained to detect onset an attack before condition human handler they paired deteriorates, giving them time take action. We investigated requirements for designing alarm system allowing dogs remotely call help when their falls unconscious being able react alert. Through a multispecies ethnographic approach we focus on physical canine user interface, involving dogs, handlers...
A search for tt\ifmmode\bar\else\textasciimacron\fi{}\ensuremath{\rightarrow}e\ensuremath{\mu}+X in pp\ifmmode\bar\else\textasciimacron\fi{} collisions at s\ensuremath{\surd}\ifmmode\bar\else\textasciimacron\fi{} TeV is described. The production and decay of top-quark--antiquark pairs considered the context standard model. analysis based on data with an integrated luminosity 4.4 ${\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$ recorded Collider Detector Fermilab. An upper limit...
An analysis of ${Z}^{0}$\ensuremath{\rightarrow}${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ and ${Z}^{0}$\ensuremath{\rightarrow}${\ensuremath{\mu}}^{+}$${\ensuremath{\mu}}^{\mathrm{\ensuremath{-}}}$ data from the Collider Detector at Fermilab in p\ifmmode\bar\else\textasciimacron\fi{}p collisions \ensuremath{\surd}s =1.8 TeV yields a mass ${Z}^{0}$ boson ${M}_{Z}$=90.9\ifmmode\pm\else\textpm\fi{}0.3 (stat+syst)\ifmmode\pm\else\textpm\fi{}0.2 (scale) GeV/${c}^{2}$ width...
An analysis of high-transverse-momentum electrons using data from the Collider Detector at Fermilab (CDF) ¯pp collisions √s=1800 GeV yields values production cross section times branching ratio for W and Z0 bosons σ(¯pp→WX→eνX)=2.19±0.04(stat)±0.21(syst) nb σ(¯pp→Z0X→e+e−X)=0.209±0.013(stat)±0.017(syst) nb. Detailed descriptions CDF electron identification, background, efficiency, acceptance are included. Theoretical predictions sections that include a mass top quark larger than mass,...
Inclusive jet production at √s=1.8 TeV has been measured in the CDF detector Fermilab Tevatron ¯pp Collider. Jets with transverse energies (Et) up to 250 GeV have observed. The Et dependence of inclusive cross section is consistent leading-order quantum-chromodynamic calculations, and comparison lower-energy data shows deviations from scaling QCD. A lower limit 700 (95% confidence level) placed on quark compositeness scale parameter Λc associated an effective contact interaction.Received 3...
We present numerical calculations of the production cross section a heavy Z′ resonance in hadron–hadron collisions with subsequent decay into top–antitop pairs. In particular, we consider leptophobic topcolor discussed under Model IV hep-ph/9911288 , which has predicted sections large enough to be experimentally accessible at Fermilab Tevatron and Large Hadron Collider CERN. This article presents an updated calculation valid for all proposed LHC collision energies. Cross are presented...
We present the dijet invariant-mass distribution in region between 60 and 500 GeV, measured 1.8-TeV $\overline{p}p$ collisions Collider Detector at Fermilab. Jets are restricted to pseudorapidity interval $|\ensuremath{\eta}|<0.7$. Data compared with QCD calculations; axigluons excluded 95% confidence $120<{M}_{A}<210$ GeV for axigluon width ${\ensuremath{\Gamma}}_{A}=\frac{N{\ensuremath{\alpha}}_{s}{M}_{A}}{6}$, $N=5$.
We have measured the Z-boson production differential cross section as a function of transverse momentum using Z\ensuremath{\rightarrow}ee and Z\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\mu} decays in p\ifmmode\bar\else\textasciimacron\fi{}p collision at \ensuremath{\surd}s =1.8 TeV with Collider Detector Fermilab. Comparison standard-model predictions shows good agreement over range 0${\mathit{p}}_{\mathit{T}}$160 GeV/c available from this data sample.
Neutral-strange-particle production has been studied in a 46000-picture exposure the Fermilab 15-ft bubble chamber. Cross sections for inclusive of ${K}_{s}^{0}$, $\ensuremath{\Lambda}$, and $\overline{\ensuremath{\Lambda}}$ are given compared with data at lower energies. The ${K}_{s}^{0}$'s produced principally central region rapidity cross section which increases energy. $\ensuremath{\Lambda}$'s by proton fragmentation, whereas $\overline{\ensuremath{\Lambda}}$'s centrally produced....
We present a calculation of the cross section for process p pbar -> Zt' t tbar, production Topcolor Z' with subsequent decay to top quark pairs in proton anti-proton collisions at 1.8 TeV. Variations varying assumptions about model, resonance width, parton distributions and renormalization scale are presented.
Yellowstone Lake, far from any ocean, hosts underwater hot springs similar to those on mid-ocean ridges. A research team is investigating the processes that drive lake’s hydrothermal systems.
The compact muon solenoid (CMS) experiment will use dijets to search for physics beyond the standard model during early LHC running. inclusive jet cross section as a function of transverse momentum, with 10 pb−1 integrated luminosity, is sensitive contact interactions reach Tevatron. dijet mass distribution be used resonances coming from new particles, example an excited quark. Additional sensitivity existence or can obtained by comparing rates in two distinct pseudorapidity regions.
A measurement of the QCD jet-broadening parameter ⟨QT⟩ is described for high-ET jet data in central calorimeter Collider Detector at Fermilab. As an alternate approach to clustering analysis, this method involves use a global event which free from ambiguities associated with definition and separation individual clusters. The QT defined as scalar sum transverse momentum perpendicular thrust axis. Parton-level predictions are made function ET, total energy events, suggest that would show...
Background: Coronavirus disease 2019 (COVID-19) has spread quickly throughout the United States (US) causing significant disruption in healthcare and society. Tools to identify hot spots are important for public health planning. The goal of our study was determine if natural language processing (NLP) algorithms based on chest computed tomography (CT) imaging correlated with incidence official COVID-19 cases deaths US. Methods: Using de-identified radiology reports from common platform...