A5053072987- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Computational Physics and Python Applications
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Nuclear physics research studies
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Radioactive Decay and Measurement Techniques
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Electron and X-Ray Spectroscopy Techniques
- Algorithms and Data Compression
- Atomic and Molecular Physics
University of Minnesota
2015-2024
Twin Cities Orthopedics
2020-2022
Uppsala University
2021-2022
Institute of High Energy Physics
2014-2021
Shanghai Jiao Tong University
2021
University of Science and Technology Liaoning
2016-2020
Argosy University
2020
Joint Institute for Nuclear Research
2015-2018
Istanbul Bilgi University
2018
Ankara University
2018
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 observed the decays ${\mathit{B}}^{0}$\ensuremath{\rightarrow}${\mathit{K}}^{\mathrm{*}}$(892${)}^{0}$\ensuremath{\gamma} and ${\mathit{B}}^{\mathrm{\ensuremath{-}}}$\ensuremath{\rightarrow}${\mathit{K}}^{\mathrm{*}}$(892${)}^{\mathrm{\ensuremath{-}}}$\ensuremath{\gamma}, which are evidence for quark-level process b\ensuremath{\rightarrow}s\ensuremath{\gamma}. The average branching fraction is...
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...
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 evidence of charmless semileptonic decays B mesons. In momentum interval 2.4–2.6 GeV/c where background from b→clν is negligible, average measured b→ueν and b→uμν partial branching ratios ΔBub(2.4,2.6) =(1.8±0.4±0.3)×10−4. Inclusion data 2.2–2.4 GeV/c, lepton yield dominated by b→clν, gives ΔBub(2.2,2.6) =(3.3±0.8±0.8)×10−4. ‖Vub/Vcb‖ depends on theoretical model b→ulν decay approximately 0.1.Received 8 November 1989DOI:https://doi.org/10.1103/PhysRevLett.64.16©1990...
We report on a study of the invariant mass spectrum hadronic system in decay ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}{\ensuremath{\nu}}_{\ensuremath{\tau}}.$ This was performed with data obtained CLEO II detector operating at CESR ${e}^{+}{e}^{\ensuremath{-}}$ collider. present fits to phenomenological models which resonance parameters associated $\ensuremath{\rho}(770)$ and $\ensuremath{\rho}(1450)$ mesons are...
We have measured ${B}^{0}$B${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$ mixing by observing like-sign dilepton events in \ensuremath{\Upsilon}(4S) decay. Assuming that the semileptonic branching fractions of charged and neutral B mesons are equal decays to ${B}^{+}$${B}^{\mathrm{\ensuremath{-}}}$ 55% time 45% time, we measure parameter r be 0.19\ifmmode\pm\else\textpm\fi{}0.06\ifmmode\pm\else\textpm\fi{}0.06, where first error is statistical second systematic.
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...
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 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...
A fourth state in the upsilon energy region has been seen ${e}^{+}{e}^{\ensuremath{-}}$ collisions at Cornell Electron Storage Ring. resonance is observed with a mass 1112\ifmmode\pm\else\textpm\fi{}5 MeV above lowest state. The 9.6-MeV rms width greater than 4.6-MeV resolution of beams. characteristics new make it likely candidate for $4^{3}S$ $b\overline{b}$ system, lying threshold production $B$ mesons.
We have used the momentum spectrum of leptons produced in semileptonic $B$-meson decays to set a 90%-confidence-level upper limit on $\frac{\ensuremath{\Gamma}(b\ensuremath{\rightarrow}\mathrm{ul}\ensuremath{\nu})}{\ensuremath{\Gamma}(b\ensuremath{\rightarrow}\mathrm{cl}\ensuremath{\nu})}$ 4%. also measure branching fractions $B$ meson be (12.0\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}0.5)% for electrons and (10.8\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\pm\else\textpm\fi{}1.0)% muons.
Using the CLEO-c detector at Cornell Electron Storage Ring, we have measured inclusive and exclusive cross sections for production of D+, D0 Ds+ mesons in e+e- annihilations thirteen center-of-mass energies between 3.97 4.26 GeV. Exclusive are presented final states consisting two charm (DD, D*D, D*D*, Ds+Ds-, Ds*+Ds-, Ds*+Ds*-) processes which charm-meson pair is accompanied by a pion. No enhancement any state observed energy Y(4260).
Three narrow resonances have been observed in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation into hadrons at total energies between 9.4 and 10.4 GeV. Measurements of mass spacing ratios lepton pair widths support the interpretation these "$\ensuremath{\Upsilon}$" states as lowest triplet-$S$ levels $b\overline{b}$ quark-antiquark system.
Measurements of the ${e}^{+}{e}^{\ensuremath{-}}$ cross section above $B\overline{B}$ threshold are reported. Structures observed which could be $\ensuremath{\Upsilon}(5S)$ and $\ensuremath{\Upsilon}(6S)$ resonances. The masses widths given compared with various potential-model predictions. Average charged multiplicities inclusive lepton yields also presented.
We measure the branching ratio of purely leptonic decay D+ meson with unprecedented precision as B(D+ -> mu+ nu) = (3.82 +/- 0.32 0.09)x10^(-4), using 818/pb data taken on psi(3770) resonance CLEO-c detector at CESR collider. use this determination to derive a value for pseudoscalar constant fD+, combining measurements lifetime and assuming |Vcd| |Vus|. find fD+ (205.8 8.5 2.5) MeV. The rate asymmetry [B(D+ nu)-B(D- mu- nu)]/[B(D+ nu)+B(D- nu)] 0.08 0.08, consistent no CP violation. also set...
$B$-meson decays to final states consisting of a ${D}^{0}$ or ${D}^{*\ifmmode\pm\else\textpm\fi{}}$ and one two charged pions have been observed. The charged-$B$ mass is 5270.8 \ifmmode\pm\else\textpm\fi{} 2.3 2.0 MeV the neutral-$B$ 5274.2 1.9 MeV.
Using 2.45x10;{7} psi(2S) decays collected with the CLEO-c detector at Cornell Electron Storage Ring we present most precise measurements of magnetic dipole transitions in charmonium system. We measure B(psi(2S)-->gammaeta_{c})=(4.32+/-0.16+/-0.60)x10;{-3}, B(J/psi-->gammaeta_{c})/B(psi(2S)-->gammaeta_{c})=4.59+/-0.23+/-0.64, and B(J/psi-->gammaeta_{c})=(1.98+/-0.09+/-0.30)%. observe a distortion eta_{c} line shape due to photon-energy dependence transition rate. find that mass are sensitive...
CLEO has studied B decays to πℓν, ρℓν, and ωℓν, where ℓ=eorμ, by incorporating the missing momentum into full reconstruction. With B0 B+ modes combined according isospin predictions for relative partial widths, we obtain B(B0→π−ℓ+ν)=(1.8±0.4±0.3±0.2)×10−4 B(B0→ρ−ℓ+ν)=(2.5±0.4+0.5−0.7±0.5)×10−4, errors are statistical, systematic, estimated model dependence. We also estimate |Vub|=(3.3±0.2+0.3−0.4±0.7)×10−3.Received 1 July 1996DOI:https://doi.org/10.1103/PhysRevLett.77.5000©1996 American...
The h(c)((1)P(1)) state of charmonium has been observed in the reaction psi(2S) --> pi(0)h(c) (gammagamma)(gammaeta(c)) using 3.08 x10(6) decays recorded CLEO detector. Data have analyzed both for inclusive reaction, where decay products eta(c) are not identified, and exclusive reactions, which reconstructed seven hadronic channels. We find M(h(c)) = 3524.4 +/- 0.6 0.4 MeV corresponds to a hyperfine splitting DeltaM(hf)(1P) triple-bond <M((3)P(J)) - M((1)P(1)) +1.0 MeV, B(psi(2S) pi(0)h(c))...
An enhancement has been observed in the inclusive cross section for direct single electrons produced ${e}^{+}{e}^{\ensuremath{-}}$ annihilations at $\ensuremath{\Upsilon}(4S)$. This is interpreted as evidence a new weakly decaying particle, $B$ meson. A branching ratio $B\ensuremath{\rightarrow}\mathrm{Xe}\ensuremath{\nu}$ of [13\ifmmode\pm\else\textpm\fi{}3 (\ifmmode\pm\else\textpm\fi{}3)]% inferred, where first set errors statistical and estimated systematic error enclosed parentheses.
We report results on the differential and total cross sections for inclusive production of charmed particles ${D}^{\mathrm{*}+}$, ${D}^{\mathrm{*}0}$, ${D}^{0}$, ${D}^{+}$, ${D}_{s}$, ${\mathrm{\ensuremath{\Lambda}}}_{\mathit{c}}$ in ${\mathit{e}}^{+}$${\mathit{e}}^{\mathrm{\ensuremath{-}}}$ annihilations at \ensuremath{\surd}s=10.55 GeV. Widely used quark fragmentation models are discussed compared with measured charmed-particle momentum distributions. This comparison, as well that...