A5106132807- 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
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear Physics and Applications
- Nuclear physics research studies
- Scientific Research and Discoveries
- Radiomics and Machine Learning in Medical Imaging
- Noncommutative and Quantum Gravity Theories
- Planetary Science and Exploration
- Advanced Semiconductor Detectors and Materials
- Medical Imaging Techniques and Applications
Northern Illinois University
2015-2024
Fermi National Accelerator Laboratory
2024
University of Nebraska–Lincoln
2006-2022
Gilead Sciences (United States)
2017
Centro Brasileiro de Pesquisas Físicas
2013-2016
European Organization for Nuclear Research
2012-2014
Institute of High Energy Physics
2011-2013
Florida State University
2012-2013
Northwestern University
2006-2012
University of Washington
2010-2012
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...
The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $ω_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run 2018. When combined a precision measurement magnetic field experiment's ring, determines anomaly $a_μ({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes...
We report evidence of a narrow structure, $X(5568)$, in the decay sequence $X(5568) \rightarrow B_s^0 π^{\pm}$, $B_s^0 J/ψϕ$, $J/ψ\rightarrow μ^+ μ^-$, $ϕ\rightarrow K^+K^-$. This is for first instance hadronic state with valence quarks four different flavors. The mass and natural width this are measured to be $m = 5567.8 \pm 2.9 {\rm \thinspace (stat)} ^{+0.9}_{-1.9} (syst)}$ MeV/$c^2$ $Γ= 21.9 6.4 ^{+5.0}_{-2.5} (syst)} $ MeV/$c^2$. If B_s^* π^{\pm} γπ^{\pm}$ an unseen $γ$, $m(X(5568))$...
We investigate the decay ${B}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}\ensuremath{\phi}{K}^{+}$ in a search for $X(4140)$ state, narrow threshold resonance $J/\ensuremath{\psi}\ensuremath{\phi}$ system. The data sample corresponds to an integrated luminosity of $10.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ collected by D0 experiment Fermilab Tevatron collider. observe mass peak with statistical significance 3.1...
We present a measurement of the forward–backward asymmetry in top quark–antiquark production using full Tevatron Run II data set collected by D0 experiment at Fermilab. The is performed lepton+jets final states new kinematic fitting algorithm for events with four or more jets and partial reconstruction only three jets. Corrected detector acceptance resolution effects, evaluated to be AFB=(10.6±3.0)%. Results are consistent standard model predictions which range from 5.0% 8.8%. also...
We present the observation of doubly-produced $J/\psi$ mesons with D0 detector at Fermilab in $p\bar{p}$ collisions $\sqrt{s}=1.96$ TeV. The production cross section for both singly and is measured using a sample an integrated luminosity 8.1fb$^{-1}$. For first time, double separated into contributions due to single parton scatterings. Using these measurements, we determine effective $\sigma_{eff}$, parameter characterizing spatial area parton-parton interactions related density inside nucleon.
The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of muon to a combined precision 0.46 parts per million with data collected during its first physics run in 2018. This paper documents measurement magnetic field storage ring. is monitored by nuclear resonance systems and calibrated terms equivalent proton spin spherical water sample at 34.7$^\circ$C. weighted distribution resulting $\tilde{\omega}'^{}_p$, denominator ratio...
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 present a measurement of the electron charge asymmetry in $p\overline{p}\ensuremath{\rightarrow}W+X\ensuremath{\rightarrow}e\ensuremath{\nu}+X$ events at center-of-mass energy 1.96 TeV, using data corresponding to $9.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected with D0 detector Fermilab Tevatron Collider. The is measured as function pseudorapidity and presented five kinematic bins based on transverse missing event. compared next-to-leading-order...
We report evidence for the simultaneous production of $J/\psi$ and $\Upsilon$ mesons in 8.1 fb$^{-1}$ data collected at $\sqrt{s}=$1.96 TeV by D0 experiment Fermilab $p \bar p$ Tevatron Collider. Events with these characteristics are expected to be produced predominantly gluon-gluon interactions. In this analysis, we extract effective cross section characterizing initial parton spatial distribution, $\sigma_{eff}=2.2\pm 0.7\mbox{(stat)} \pm 0.9 \mbox{(syst)} ~\mbox{mb}$.
We present a measurement of the semileptonic mixing asymmetry for ${B}^{0}$ mesons, ${a}_{\mathrm{sl}}^{d}$, using two independent decay channels: ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{D}^{\ensuremath{-}}X$, with ${D}^{\ensuremath{-}}\ensuremath{\rightarrow}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}$; and ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{D}^{*\ensuremath{-}}X$,...
We measure the inclusive single muon charge asymmetry and like-sign dimuon in $p \bar{p}$ collisions using full data set of 10.4 fb$^{-1}$ collected with D0 detector at Fermilab Tevatron. The standard model predictions asymmetries induced by CP violation are small magnitude compared to current experimental precision, so non-zero measurements could indicate new sources violation. differ from these a significance 3.6 deviations. These results interpreted framework $B$ meson mixing within CKM...
We measure the mass of top quark in lepton+jets final states using full sample pp collision data collected by D0 experiment Run II Fermilab Tevatron Collider at sqrt[s] = 1.96 TeV, corresponding to 9.7 fb(-1) integrated luminosity. use a matrix element technique that calculates probabilities for each event result from tt production or background. The overall jet energy scale is constrained situ W boson. m(t) 174.98 ± 0.76 GeV. This constitutes most precise single measurement top-quark mass.
We determine the fraction of events with double parton (DP) scattering in a single $p\overline{p}$ collision at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ samples $\ensuremath{\gamma}+3$ jet and $\ensuremath{\gamma}+b/c\text{ }\text{jet}+2$ collected D0 detector corresponding to an integrated luminosity about $8.7\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The DP fractions effective cross sections (${\ensuremath{\sigma}}_{\text{eff}}$) are measured for both event using same kinematic...
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 Deep Underground Neutrino Experiment (DUNE) is a next generation experiment aimed to study neutrino oscillation. Its long-baseline configuration will exploit Near Detector (ND) and Far (FD) located at distance of ∼1300 km. FD consist four Liquid Argon Time Projection Chamber (LAr TPC) modules. A Photon Detection System (PDS) be used detect the scintillation light produced inside detector after interactions. PDS based on collectors coupled Silicon Photomultipliers (SiPMs)....
We present a comprehensive analysis of inclusive W(→eν)+n-jet (n≥1, 2, 3, 4) production in proton-antiproton collisions at center-of-mass energy 1.96 TeV the Tevatron collider using 3.7 fb−1 data set collected by D0 detector. Differential cross sections are presented as function jet rapidities (y), lepton transverse momentum (pT) and pseudorapidity (η), scalar sum energies W boson all jets (HT), leading dijet pT invariant mass, rapidity separations for variety pairings pT-ordered...
We present a measurement of the muon charge asymmetry from decay $W$ boson via $W\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}$ using $7.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected with D0 detector at Fermilab Tevatron Collider $\sqrt{s}=1.96\text{ }\mathrm{TeV}$. The is presented in two kinematic regions transverse momentum and event missing energy: (${p}_{T}^{\ensuremath{\mu}}>25\text{ }\mathrm{GeV}$,...
We present measurements of asymmetries in angular distributions leptons produced ttbar events proton-antiproton collisions at the Fermilab Tevatron Collider. consider final states where W bosons from top quark and antiquark decays both decay into l nu (l=e, mu) resulting oppositely charged dilepton with accompanying jets. Using 9.7 fb^-1 integrated luminosity collected D0 detector, we find lepton pseudorapidity compatible predictions based on standard model.
We present a study of the inclusive production $X(4140)$ state with decay to $J/\ensuremath{\psi}\ensuremath{\phi}$ final in hadronic collisions. Based on $10.4\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collision data collected by D0 experiment at Fermilab Tevatron collider, we report first evidence for prompt an and find fraction events originating from $b$ hadrons be...
We present a search for anomalous components of the quartic gauge boson coupling WW{\gamma}{\gamma} in events with an electron, positron and missing transverse energy. The analyzed data correspond to 9.7 fb^-1 integrated luminosity collected by D0 detector ppbar collisions at sqrt(s) = 1.96 TeV. presence couplings would manifest itself as excess boosted WW events. No such is found data, we set most stringent limits date on parameters a_0^W a_C^W. When form factor Lambda_cutoff 0.5 TeV used,...
We use a sample of diphoton+dijet events to measure the effective cross section double parton interactions, which characterizes area containing interacting partons in proton-antiproton collisions, and find it be σeff=19.3±1.4(stat)±7.8(syst) mb. The was collected by D0 detector at Fermilab Tevatron collider p¯p collisions √s=1.96 TeV corresponds an integrated luminosity 8.7 fb−1.Received 17 December 2015DOI:https://doi.org/10.1103/PhysRevD.93.052008© 2016 American Physical SocietyPhysics...
We present searches for the anomalous γWW and ZWW trilinear gauge boson couplings from WW WZ production using lepton plus dijet final states a combination with results Wγ, WW, leptonic states. The analyzed data correspond to up 8.6fb−1 of integrated luminosity collected by D0 detector in pp¯ collisions at s=1.96TeV. set most stringent limits hadron collider date assuming two different relations between coupling parameters Δκγ, λ, Δg1Z cutoff energy scale Λ=2TeV. combined 68% C.L. are...