A5000280954- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- HVDC Systems and Fault Protection
- Superconductivity in MgB2 and Alloys
- Dark Matter and Cosmic Phenomena
- Spacecraft and Cryogenic Technologies
- Fusion materials and technologies
- International Science and Diplomacy
- Thermal Analysis in Power Transmission
- Muon and positron interactions and applications
- Electromagnetic Launch and Propulsion Technology
- Metal and Thin Film Mechanics
- Neutrino Physics Research
- Electric Motor Design and Analysis
- Scientific Research and Discoveries
- Educational and Social Studies
- Electronic Packaging and Soldering Technologies
- Magnetic Properties of Alloys
Fermi National Accelerator Laboratory
2016-2025
The Ohio State University
2010-2023
State Library of Ohio
2022-2023
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
1996-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2017-2020
University of Pisa
2017-2020
Fermi Research Alliance
2002-2020
United States Department of Energy
2015
European Organization for Nuclear Research
2008-2014
Linde (United States)
2012
We present the first results of Fermilab Muon g-2 Experiment for positive muon magnetic anomaly $a_\mu \equiv (g_\mu-2)/2$. The is determined from precision measurements two angular frequencies. Intensity variation high-energy positrons decays directly encodes difference frequency $\omega_a$ between spin-precession and cyclotron frequencies polarized muons in a storage ring. ring field measured using nuclear resonance probes calibrated terms equivalent proton spin precession...
We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, ω[over ˜]_{p}^{'}, anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From ratio...
Abstract A multi-TeV muon collider offers a spectacular opportunity in the direct exploration of energy frontier. Offering combination unprecedented collisions comparatively clean leptonic environment, high has unique potential to provide both precision measurements and highest reach one machine that cannot be paralleled by any currently available technology. The topic generated lot excitement Snowmass meetings continues attract large number supporters, including many from early career...
We present a study of $J/\ensuremath{\psi}$ and $\ensuremath{\psi}(2S)$ production in $p\overline{p}$ collisions, at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ with the CDF detector Fermilab. The mesons are reconstructed using their ${\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay modes. have measured inclusive cross section for both as function transverse momentum central region, $|\ensuremath{\eta}|<0.6$. also measure fraction these events...
A strong signal for double parton (DP) scattering is observed in a $16{\mathrm{pb}}^{\mathrm{\ensuremath{-}}1}$ sample of $\overline{p}p\ensuremath{\rightarrow}\ensuremath{\gamma}/{\ensuremath{\pi}}^{0}+3\mathrm{jets}+X$ data from the CDF experiment at Fermilab Tevatron. In DP events, two separate hard scatterings take place single $\overline{p}p$ collision. We isolate large $(\ensuremath{\sim}14000\mathrm{events})$ which 53% are found to be DP. The process-independent parameter scattering,...
We have measured the fraction of $J/\ensuremath{\psi}$ mesons originating from ${\ensuremath{\chi}}_{c}$ meson decays in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$. The fraction, for ${P}_{T}^{J/\ensuremath{\psi}}>4.0\mathrm{GeV}/c$ and $|{\ensuremath{\eta}}^{J/\ensuremath{\psi}}|<0.6$, not including contributions $b$ flavored hadrons, is...
The inclusive jet differential cross section has been measured for transverse energies, ET, from 15 to 440 GeV, in the pseudorapidity region 0.1≤|η|≤0.7. results are based on 19.5pb−1 of data collected by CDF Collaboration at Fermilab Tevatron collider. compared with QCD predictions various sets parton distribution functions. jets ET>200GeV is significantly higher than current O(αs3) perturbative calculations. Various possible explanations high- ET excess discussed.Received 25 January...
The International Linear Collider (ILC) is on the table now as a new global energy-frontier accelerator laboratory taking data in 2030s. ILC addresses key questions for our current understanding of particle physics. It based proven technology. Its experiments will challenge Standard Model physics and provide window to look beyond it. This document brings story up date, emphasizing its strong motivation, readiness construction, opportunity it presents US community.
We present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based positive data taken at Fermilab's Muon Campus during 2019 and 2020 accelerator runs. uses $3.1$ GeV$/c$ polarized muons stored in $7.1$-m-radius storage ring with $1.45$ T uniform field. value $ a_{\mu}$ determined from measured difference between spin precession frequency its cyclotron frequency. This normalized to strength field, using Nuclear Magnetic Resonance (NMR). ratio...
We have searched for heavy neutral gauge bosons (Z′) in dielectron and dimuon decay modes using 110pb−1 of ¯pp collisions at √s=1.8TeV collected with the Collider Detector Fermilab. present a limit on production cross section times branching ratio Z′ boson decaying into dileptons as function mass. For mass MZ′>600GeV/c2, upper is 40 fb 95% confidence level. set lower limits 690, 590, 620, 595, 565, 630, 600GeV/c2 Z′SM, Zψ, Zη, Zχ, ZI, ZLR, ZALRM, respectively.Received 6 May...
A next step of energy increase hadron colliders beyond the LHC requires high-field superconducting magnets capable providing a dipolar field in range 16 T 50-mm aperture with accelerator quality. These characteristics could meet requirements for an upgrade to twice present beam or 100-TeV center mass future circular collider. This paper summarizes activities and plans development these magnets, inand U.S. Magnet Development Program.
We search for the flavor-changing neutral current decays of top quark t→qγ and t→qZ (here q represents c u quarks) in ¯pp collisions at √s=1.8TeV. use a dataset (∫Ldt∼110pb−1) collected during 1992–1995 run Collider Detector Fermilab. set 95% confidence level limits on branching fractions B(t→qγ)<3.2% B(t→qZ)<33%, consistent with standard model.Received 24 July 1997DOI:https://doi.org/10.1103/PhysRevLett.80.2525©1998 American Physical Society
We have used 106 pb^-1 of data collected with the Collider Detector at Fermilab to search for new particles decaying dijets. exclude 95% confidence level models containing following particles: axigluons and flavor universal colorons mass between 200 980 GeV/c, excited quarks 80 570 GeV/c^2 580 760 GeV/c^2, color octet technirhos 260 480 W' bosons 300 420 E_6 diquarks 290 GeV/c^2.
A strong signal for double parton scattering (DP) is observed in a $16\mathrm{pb}{}^{\ensuremath{-}1}$ sample of $\overline{p}p\ensuremath{\rightarrow}\ensuremath{\gamma}+3\mathrm{jets}+X$ data from the CDF experiment at Fermilab Tevatron. The process-independent DP parameter, ${\ensuremath{\sigma}}_{\mathrm{eff}}$, obtained without reference to theoretical calculations by comparing events with hard scatterings separate $\overline{p}p$ collisions. result,...
In 2004, the US DOE established LHC Accelerator Research Program (LARP) with goal of developing a technology base for future upgrades LHC. The focus magnet program, which is collaboration three laboratories, BNL, FNAL and LBNL, on development high gradient quadrupoles using <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$ Nb_3 Sn$</tex> superconductor. Other program components address issues regarding design, radiation-hard materials, long...
The LHC collimation upgrade foresees two additional collimators installed in the dispersion suppressor regions of points 2, 3 and 7. To obtain necessary longitudinal space for collimators, a solution based on an 11 T dipole as replacement 8.33 main dipoles is being considered. CERN FNAL have started joint development program to demonstrate feasibility <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex...
We present a new measurement of the positive muon magnetic anomaly, $a_\mu \equiv (g_\mu - 2)/2$, from Fermilab Muon $g\!-\!2$ Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, $\tilde{\omega}'^{}_p$, anomalous precession frequency corrected for beam dynamics effects,...
Abstract The U.S. Magnet Development Program (US-MDP) explores high-field accelerator magnets compatible with operational conditions beyond the limits of Nb 3 Sn technology. ongoing R&D High-Temperature Superconductors (HTS) suggests using Bi 2 Sr CaCu O 8−x (Bi-2212) as superconducting element. Bi-2212 Rutherford cables maintain a high critical current (I C ) when exposed to large external magnetic field. However, Bi-2122 exhibits an oversensitive stress-strain response subject Lorentz...
This Letter describes a direct search for charged Higgs boson production in $p\overline{p}$ collisions at $\sqrt{s}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{TeV}$ recorded by the Collider Detector Fermilab. Two-Higgs-double extensions to standard model predict existence of bosons $({H}^{\ifmmode\pm\else\textpm\fi{}})$. In such models, branching fraction top quarks $B(t\ensuremath{\rightarrow}{H}^{+}b\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}\ensuremath{\nu}b)$ can be...
We report the first observation of diffractively produced W bosons. In a sample -> e nu events in p-barp collisions at sqrt{s}=1.8 TeV, we find an excess with forward rapidity gap, which is attributed to diffraction. The probability that this consistent non-diffractive production 1.1 10^{-4} (3.8 sigma). relatively low fraction W+Jet observed within implies mainly quarks from pomeron, mediates diffraction, participate production. diffractive ratio found be R_W=(1.15 +/- 0.55)%.
We have used 106 pb^-1 of data collected in proton-antiproton collisions at sqrt(s)=1.8 TeV by the Collider Detector Fermilab to measure jet angular distributions events with two jets final state. The agree next leading order (NLO) predictions Quantum Chromodynamics (QCD) all dijet invariant mass regions. exclude 95% confidence level (CL) a model quark substructure which only up and down quarks are composite contact interaction scale is Lambda_ud(+) < 1.6 or Lambda_ud(-) 1.4 TeV. For...