L. Gibbons
A5031650189- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Distributed and Parallel Computing Systems
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Scientific Computing and Data Management
- Algorithms and Data Compression
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Radioactive Decay and Measurement Techniques
- Cold Atom Physics and Bose-Einstein Condensates
Cornell University
2012-2024
AstraZeneca (United Kingdom)
2024
Kansas State University
2013-2014
Fairfield University
2014
European Organization for Nuclear Research
2012-2014
University of Iowa
2013
University of Colorado Boulder
2012
University of Florida
2000-2012
Université Claude Bernard Lyon 1
2011
University of Puerto Rico-Mayaguez
2006
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 have measured the inclusive $b\ensuremath{\rightarrow}s\ensuremath{\gamma}$ branching ratio to be $(2.32\ifmmode\pm\else\textpm\fi{}0.57\ifmmode\pm\else\textpm\fi{}0.35)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$, where first error is statistical and second systematic. Upper lower limits on ratio, each at 95% C.L., are $B(b\ensuremath{\rightarrow}s\ensuremath{\gamma})<4.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$...
Using 13.5 ${\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data collected with the CLEO II detector, we have observed a narrow resonance decaying to ${D}_{s}^{*+}{\ensuremath{\pi}}^{0}$ mass near $2.46\mathrm{GeV}{/c}^{2}.$ The search for such state was motivated by recent discovery BaBar Collaboration at $2.32\mathrm{GeV}{/c}^{2},$ ${D}_{\mathrm{sJ}}^{*}{(2317)}^{+},$ that decays ${D}_{s}^{+}{\ensuremath{\pi}}^{0}.$ Reconstructing...
We have measured the branching fraction and photon energy spectrum for radiative penguin process b-->s gamma. find Beta(b-->s gamma) = (3.21+/-0.43+/-0.27(+0.18)(-0.10))x10(-4), where errors are statistical, systematic, from theory corrections. obtain first second moments of above 2.0 GeV, <E( gamma)> 2.346+/-0.032+/-0.011 <E(2)(gamma)>-<E(gamma)>(2) 0.0226+/-0.0066+/-0.0020 GeV(2), statistical systematic. From moment, we (in modified minimal subtraction renormalization scheme, to order...
This article reports world averages for measurements of b-hadron, c-hadron, and tau-lepton properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at least through end 2009. Some presented use data spring 2010. For averaging, common input parameters used in various analyses are adjusted (rescaled) to values, known correlations taken into account. The include branching fractions, lifetimes, neutral meson mixing parameters, CP violation semileptonic decays.
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...
Background SERENA-1 (NCT03616587) is a Phase 1, multi-part, open-label study of camizestrant in pre- and post-menopausal women with ER+, HER2− advanced breast cancer. Parts A B aim to determine the safety tolerability monotherapy define doses for clinical evaluation. Patients Methods Women aged 18 years or older metastatic recurrent cancer, refractory (or intolerant) therapy were assigned 25 mg up 450 once daily (QD; escalation) 75, 150, 300 QD (expansion). Safety tolerability, anti-tumor...
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 2205 new measurements 667 papers, we list, evaluate, and average measured properties gauge bosons, leptons, quarks, mesons, baryons. We also summarize searches for hypothetical particles such as Higgs heavy neutrinos, supersymmetric particles. All the particle search limits are listed in Summary Tables. give numerous tables, figures, formulae, reviews topics Standard Model, detectors,...
This article reports world averages for measurements of b-hadron and c-hadron properties obtained by the Heavy Flavor Averaging Group (HFAG) using results available at end 2007. For averaging, common input parameters used in various analyses are adjusted (rescaled) to values, known correlations taken into account. The include branching fractions, lifetimes, neutral meson mixing parameters, CP violation semileptonic decays.
Using data collected with the CLEO detector operating at CESR e+e- collider sqrt[s]=3.97-4.26 GeV, we investigate 15 charmonium decay modes of psi(4040), psi(4160), and Y(4260) resonances. We confirm, 11 sigma significance, BABAR Y(4260)-->pi+pi- J/psi discovery, make first observation Y(4260)--> pi(0)pi(0) (5.1 sigma), find evidence for Y(4260)-->K+K- J/psi(3.7 sigma). measure cross sections sqrt[s]=4.26 GeV as sigma(pi+pi- J/psi)=58(+12)(-10)+/-4 pb, sigma(pi(0)pi(0) J/psi)=23(+12)(-8)+/-1...
A measurement of the CP-violation parameter Re(ɛ’/ɛ) has been made using full E731 data set. We find Re(ɛ’/ɛ)=(7.4±5.2±2.9)×10−4 where first error is statistical and second systematic.Received 18 January 1993DOI:https://doi.org/10.1103/PhysRevLett.70.1203©1993 American Physical Society
Using $13.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collision data taken in the $\ensuremath{\Upsilon}(1S\ensuremath{-}4S)$ region with CLEO III detector at CESR collider, a search has been made for new resonance $Y(4260)$ recently reported by BABAR Collaboration. The production initial state radiation (ISR), and its decay into ${\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}J/\ensuremath{\psi}$, are confirmed. A good quality fit to our is...
We report the first determination of relative strong-phase difference between D^0 -> K^0_S,L K^+ K^- and D^0-bar K^-. In addition, we present updated measurements pi^+ pi^- pi^-. Both exploit quantum coherence a pair mesons produced from psi(3770) decays. The differences measured are important for determining Cabibbo-Kobayashi-Maskawa angle gamma/phi_3 in B^- D^0-tilde decays, where is or meson decaying to K^0_S h^+ h^- (h=pi,K), manner independent model assumed describe decay. Using our...
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 the first measurement of D*+ width using 9/fb e+ e- data collected near Upsilon(4S) resonance by CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction that takes advantage small vertical size CESR beam spot to measure energy release distribution from -> D0 pi+ decay. find Gamma(D*+) = 96 +- 4 (Statistical) 22 (Systematic) keV. also in decay compute Delta m m(D*+) - m(D0) 145.412 0.002 0.012 MeV/c^2
Using the entire CLEO-c \psi(3770)-> D\bar{D} event sample, corresponding to an integrated luminosity of $818 pb^-1 and approximately 5.4 million events, we present a study decays D^0 -> \pi^- e^+ \nu_e, K^- D^+ \pi^0 \bar{K}^0 \nu_e. Via tagged analysis technique, in which one D is fully reconstructed hadronic mode, partial rates for semileptonic by other are measured several q^2 bins. We fit these using form factor parameterizations report results, including shape parameters branching...
We extract a relatively precise value for the decay constant of ${D}^{+}$ meson by measuring $\mathcal{B}({D}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}\ensuremath{\nu})=(4.40\ifmmode\pm\else\textpm\fi{}{0.66}_{\ensuremath{-}0.12}^{+0.09})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ using $281\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ data taken on $\ensuremath{\psi}(3770)$ resonance with CLEO-$c$ detector. find...
Using $20.7\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data taken at $\sqrt{s}=3.671\text{ }\mathrm{GeV}$ with the $\mathrm{CLEO}\mathrm{\text{\ensuremath{-}}}c$ detector, precision measurements electromagnetic form factors charged pion, kaon, and proton have been made for timelike momentum transfer $|{Q}^{2}|=13.48\text{ }{\mathrm{GeV}}^{2}$ by reaction ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{h}^{+}{h}^{\ensuremath{-}}$. The...
Using $281\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ collisions recorded at the $\ensuremath{\psi}(3770)$ resonance with CLEO-c detector CESR (Cornell Electron Storage Ring), we determine absolute hadronic branching fractions charged and neutral $D$ mesons using a double tag technique. Among measurements for three ${D}^{0}$ six ${D}^{+}$ modes, obtain reference...
Using 13.5 inverse fb of e+e- annihilation data collected with the CLEO II detector we have observed a narrow resonance in Ds*+pi0 final state, mass near 2.46 GeV. The search for such state was motivated by recent discovery BaBar Collaboration at 2.32 GeV, DsJ*(2317)+ that decays to Ds+pi0. Reconstructing Ds+pi0 and states data, observe peaks both corresponding reconstructed difference distributions, dM(Dspi0)=M(Dspi0)-M(Ds) dM(Ds*pi0)=M(Ds*pi0)-M(Ds*), them values 350 MeV. We interpret...
Previous reports on the safety of exercise testing have been based surveys from different facilities with a variety protocols and patient types. From 1971 through 1987, 71,914 maximal tests conducted in population low prevalence known coronary heart disease under uniform conditions at single medical facility resulted six major cardiac complications including one death. No occurred past 10 years 45,000 tests. The overall complication rate men women is 0.8 per 10,000 95% confidence intervals...