A5105275043- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Advanced Data Storage Technologies
- Parallel Computing and Optimization Techniques
- Dark Matter and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Scientific Computing and Data Management
- Radiation Detection and Scintillator Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Interconnection Networks and Systems
- International Science and Diplomacy
- Cholesterol and Lipid Metabolism
Fermi National Accelerator Laboratory
2001-2024
Austrian Academy of Sciences
2012
Institute of High Energy Physics
2012
University of Colorado Boulder
1987-2009
University of California, Davis
2007
University of Colorado System
2003
University of California, Irvine
2003
University of Illinois Urbana-Champaign
1976-1995
Istituto Nazionale di Fisica Nucleare
1993-1994
Universities Research Association
1990
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...
We report evidence, from a study of multihadron final states produced in the wide-band photon beam at Fermilab, for production new antibaryon state which decays into $\overline{\ensuremath{\Lambda}}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$. The mass this is 2.26 \ifmmode\pm\else\textpm\fi{} 0.01 ${\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c}}^{2}$ and its decay width less than 75 ${\mathrm{M}\mathrm{e}\mathrm{V}/\mathit{c}}^{2}$. also evidence...
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...
Using data from the FOCUS experiment we analyze $D^+π^-$ and $D^0π^+$ invariant mass distributions. We measure $D_2^{*0}$ $M_{D_2^{*0}} = (2464.5 \pm 1.1 1.9) \mev$ width $Γ_{D_2^{*0}} (38.7 5.3 2.9) \mev$, $D_2^{*+}$ $ M_{D_2^{*+}} (2467.6 1.5 0.76) Γ_{D_2^{*+}} (34.1 6.5 4.2) \mev$. find evidence for broad structures over background in both neutral charged final state. If each is interpreted as a single L=1, $j_q=1/2$ excited charm meson resonance, masses widths are $M_{1/2}^0 =(2407 21...
Measurements of the energy and $t$ dependence diffractive $\frac{J}{\ensuremath{\psi}}$ photoproduction are presented. A significant rise in cross section over range 60-300 GeV is observed. It found that (30\ifmmode\pm\else\textpm\fi{}4)% events inelastic.
We have performed a search for CPT violation in neutral charm meson oscillations. While flavor mixing the sector is predicted to be small by Standard Model, it still possible investigate through study of proper time dependence asymmetry right-sign decay rates $D^0\to K^-π^+$ and $\d0b\to K^+π^-$. This related violating complex parameter $ξ$ parameters $x$ $y$: $A_{CPT}\propto{\rm Re} ξy-{\rm Im} ξx$ . Our 95% confidence level limit $-0.0068
We report measurements from elastic photoproduction of $\ensuremath{\omega}'\mathrm{s}$ on hydrogen for photon energies between 60 and 225 GeV, $\ensuremath{\varphi}$ 35 165 GeV deuterium 45 85 an enhancement at 1.72 GeV/${\mathit{c}}^{2}$ decaying into ${K}^{+}{K}^{\ensuremath{-}}$, inelastic $p\overline{p}$ pairs.
Direct production of electrons and muons is observed in 300-GeV $p$-Be collisions. The yields are much higher than predicted from current models. Data consistent with charge symmetry universality.
We have measured the production of $\ensuremath{\rho}+\ensuremath{\omega}$ and $J$ vector mesons, through their dimuon decay modes, by high-energy neutrons on nuclear targets at Fermilab. determined $A$ dependence to be ${A}^{0.62\ifmmode\pm\else\textpm\fi{}0.03}$ for $\ensuremath{\rho}+\ensuremath{\omega}$, ${A}^{0.93\ifmmode\pm\else\textpm\fi{}0.04}$ $J$, ${A}^{0.85\ifmmode\pm\else\textpm\fi{}0.05}$ continuum dimuons between masses.
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,...
Using data collected by the high-energy photoproduction experiment FOCUS at Fermilab we performed a Dalitz plot analysis of Cabibbo favored decay D+→K−π+π+. This study uses 53653 Dalitz-plot events with signal fraction ∼97%, and represents highest statistics, most complete for this channel. Results are presented discussed using two different formalisms. The first is simple sum Breit–Wigner functions freely fitted masses widths. It model traditionally adopted serves as comparison already...
We report on a search for the photoproduction of ${D}^{0}({\overline{D}}^{0})$ mesons in events which have zero total visible strangeness. observe an enhancement 94\ifmmode\pm\else\textpm\fi{}19 ${K}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\pi}}^{\ensuremath{\mp}}$ decay mode, corresponding to cross section \ensuremath{\sim}720 nb assuming branching ratio 0.018.
An observation of an excited ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+\mathrm{*}}$ baryon decaying to ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$${\mathrm{\ensuremath{\pi}}}^{+}$${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$, with ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}^{+}$\ensuremath{\rightarrow}${\mathit{pK}}^{\mathrm{\ensuremath{-}}}$${\mathrm{\ensuremath{\pi}}}^{+}$, is presented. We reconstruct...