60 Result(s)
within
Y F Wang
Physics
Elementary Particles, Quantum Field Theory
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Article
Measurement of electroweak parameters from hadronic and leptonic decays of theZ 0
We have studied the reactionse + e −→hadrons,e + e −, μ+ μ− and τ+ τ−, in the energy range 88.2 \( \leqq \sqrt s \leqq 94.2\) ...
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Article
Studies of hadronic event structure and comparisons with QCD models at theZ 0 resonance
The structure of hadronic events fromZ 0 decay is studied by measuring event shape variables, factorial moments, and the energy flow distribution. The distributions, after correction for detector effects and init...
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Article
Search for non-minimal Higgs bosons inZ 0 decays
We report on a search for the neutral and charged Higgs bosons predicted by models of spontaneous symmetry breaking with more than one Higgs doublet field. No signals are observed. We set model-independent lim...
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Measurement of cross sections and leptonic forward-backward asymmetries at theZ pole and determination of electroweak parameters
We report on the measurement of the leptonic and hadronic cross sections and leptonic forward-backward asymmetries at theZ peak with the L3 detector at LEP. The total luminosity of 40.8 pb−1 collected in the year...
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Article
Measurement of the branching ratiosb →e ν X, μ ν X, τ ν X andν X
The inclusive semileptonic branching ratios b→eνX,μ νX,τ νX andνX have been measured at LEP with the L3 detector. The analysis is based on 2-jet hadronic Z decays obtained in the data collected between 1991 and 1...
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Article
Experimental studies of the π+π-π+π-π0, K+K-π+π-π0 and pp̄π+π-π0 final states produced in e+e- annihilation at \(\sqrt{s}= 3.773\) and 3.650 GeV
We report measurements of the observed cross sections for e+e-→ωπ+π-, ωK+K-, ωpp̄, K+K-ρ0π0, K+K-ρ+π-+c.c., K*0K-π+π0+c.c., K*+K-π+π-+c.c., φπ+π-π0 and ΛΛ̄π0 at
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Article
Open AccessStudy of J/ψ decaying into ωpp̄
The decay J/ψ→ωpp̄ is studied using a 5.8×107 J/ψ event sample accumulated with the BES II detector at the Bei**g Electron–Positron Collider. The decay branching fraction is measured to be B(J/ψ→ωpp̄)=(9.8±0.3±1...
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Article
Open AccessExperimental studies of e + e −→ some charmless processes containing K S 0 at \(\sqrt{s}=3.773\) and 3.65 GeV
We measure the observed cross sections for the charmless processes e + e −→K S
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Article
Open AccessSearch for ψ(3770)→ charmless final states involving η or π 0 mesons
We search for ψ(3770)→π + π − η, K + K − ...
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Article
Open AccessThe Physics of the B Factories
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Article
Open AccessImproved measurement of the absolute branching fraction of \(D^{+}\rightarrow \bar{K}^0 \mu ^{+}\nu _{\mu }\)
By analyzing 2.93 fb \(^{-1}\) ...
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Article
Open AccessObservation of X(2370) and search for X(2120) in \(J/\psi \rightarrow \gamma K{\bar{K}} \eta '\)
Using a sample of \(1.31\times 10^{9} ~J/\psi \)1.31×109J/ψ events collected with the BESIII detector, we perform a study of \(J/\psi \rightarrow \gamma K{\bar{K}}\eta '\)J/ψ→γKK¯η′. X(2370) is observed in the $$...
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Article
Open AccessPrecise measurements of branching fractions for \( {\mathrm{D}}_{\mathrm{s}}^{+} \) meson decays to two pseudoscalar mesons
We measure the branching fractions for seven D s + \( {D}_s^{+} \) two-body decays to pseudo-scalar mesons, by analyzing data collected at s \( \sqrt{s} \) = 4.178 ∼ 4.226 GeV with the BESIII detector...
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Article
Open AccessMeasurement of the absolute branching fraction of the inclusive decay \(\Lambda _c^+ \rightarrow K_S^0X\)
We report the first measurement of the absolute branching fraction of the inclusive decay \(\Lambda _c^+ \rightarrow K_S^0X\)
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Article
Open AccessMeasurement of the D → K−π+π+π− and D → K−π+π0 coherence factors and average strong-phase differences in quantum-correlated \( D\overline{D} \) decays
The decays D → K−π+π+π− and D → K−π+π0 are studied in a sample of quantum-correlated D ...
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Article
Open AccessSearch for the rare semi-leptonic decay J/ψ → D−e+νe + c.c.
Using 10.1 × 109 J/ψ events produced by the Bei**g Electron Positron Collider (BEPCII) at a center-of-mass energy ...
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Article
Open AccessAmplitude analysis and branching-fraction measurement of \( {D}_s^{+}\to {K}_S^0{\pi}^{+}{\pi}^0 \)
By using 6.32 fb−1 of data collected with the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, we perform an amplitude analysis of the decay
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Article
Open AccessObservation of e+e− → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV
Using a total of 5.25 fb−1 of e+e− collision data with center-of-mass energies from 4.236 to 4.600 GeV, we report the first observation of the process e+e− → ηψ(2S) with a statistical significance of 4.9 standard...
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Article
Open AccessObservation of the decays χcJ → \( {\mathrm{nK}}_{\mathrm{S}}^0\overline{\Lambda} \) + c.c.
By analyzing 4.48 × 108 ψ(3686) events collected with the BESIII detector, we observe the decays χcJ → ...
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Article
Open AccessMeasurement of branching fractions of J/ψ and ψ(3686) decays to Σ+ and \( \overline{\Sigma} \) −
Using 1310.6 × 106 J/ψ and 448.1 × 106 ψ(3686) events collected with the BESIII detector, the branching fractions of J/ψ decays to Σ+ ...
