Y. N. Guo

activity

19982008

J / ψ \to ϕ π^{+} π^{-}

and

ϕ K^{+} K^{-}

280 citations · 1.3k across the 29 of their papers we have counts for

collaborators

Showing hep-exShow all

29 papers · 1 filter

hep-ex2008★ 21 cited

First measurements of J/Psi decays into $Σ^{+} Σ ˉ^{-}$ and $Ξ^{0} Ξ ˉ^{0}$

BES Collaboration

Based on 58 million J/Psi events collected with the BESII detector at the BEPC, the baryon pair processes J/Psi to $Σ^{+} Σ ˉ^{-}$ and J/Psi to $Ξ^{0} Ξ ˉ^{0}$ are observed for the fir…

hep-ex2008★ 9 cited

Measurements of J/ψdecays into ωK \bar{K} πand ϕK \bar{K} π

BES Collaboration

The decays of $J / ψ \to ω K K ˉ π$ and $J / ψ \to ϕ K K ˉ π$ are studied using $5.8 \times 1 0^{7}$ $J / ψ$ events collected with the Beijing Spectrometer (BESII) at the Beijing Electron…

hep-ex2007★ 4 cited

Measurements of $J / ψ$ and $ψ (2 S)$ decays into $Λ Λ ˉ π^{0}$ and $Λ Λ ˉ η$

BES Collaboration, M. Ablikim

Using 58 million $J / ψ$ and 14 million $ψ (2 S)$ events collected by the BESII detector at the BEPC, branching fractions or upper limits for the decays $J / ψ$ and $ψ (2 S) \to Λ Λ ˉ π^{0}$ …

hep-ex2006★ 47 cited

Measurements of the continuum $R_{uds}$ and $R$ values in $e^{+} e^{-}$ annihilation in the energy region between 3.650 and 3.872 GeV

M. Ablikim et al

We report measurents of the continuum $R_{uds}$ near the center-of-mass energy of 3.70 GeV, the $R_{uds (c) + ψ (3770)} (s)$ and the $R_{had} (s)$ values in $e^{+} e^{-}$ annihi…

hep-ex2006★ 4 cited

Improved measurement of $ψ (2 S)$ decays into $τ^{+} τ^{-}$

BES Collaboration, M. AblikimJ

Using 14M $ψ (2 S)$ events collected at BESII, the branching fraction of $ψ (2 S) \to τ^{+} τ^{-}$ is measured to be $B r_{τ τ} = (3.10 \pm 0.21 \pm 0.38) \times 1 0^{- 3}$ , where the first error…

hep-ex2006★ 98 cited

Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)

M. Ablikim et al.

We report measurements of the branching fractions for $ψ (3770) \to D^{0} D ˉ^{0}, D^{+} D^{-}, D D ˉ$ and resonance parameters of $ψ (3770)$ and $ψ (2 S)$ . By analyzing the line-shapes of…

hep-ex2006★ 38 cited

Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega

Bes Collaboration

The decay channel J/ψ->gamma omega omega, omega -> pi+ pi- pi0 is analyzed using a sample of 5.8x10^7 J/psi events collected with the BESII detector. The omega omega invariant mass…

hep-ex2006★ 7 cited

Measurement of chi_cJ Decays to 2(pi^+pi^-)ppbar Final States

M. Ablikim

Using chi_cJ -> 2(π^+π^-) ppbar decays from 14 \times 10^6 psi(2S) events accumulated by the BESII detector at the BEPC, the intermediate states Xi^+Xi^-, Lambda Lambdabar pi^+ pi^…

hep-ex2005★ 3 cited

Measurement of branching fractions for the inclusive Cabibbo-favored ~K0(892) and Cabibbo-suppressed K0(892) decays of neutral and charged D mesons

M. Ablikim, BES Collaboration

The branching fractions for the inclusive Cabibbo-favored ~K*0 and Cabibbo-suppressed K*0 decays of D mesons are measured based on a data sample of 33 pb-1 collected at and around…

hep-ex2005★ 65 cited

Partial Wave Analysis of $χ_{c 0} \to π^{+} π^{-} K^{+} K^{-}$

M. Ablikim, BES Collaboration

A partial wave analysis of $χ_{c 0} \to π^{+} π^{-} K^{+} K^{-}$ in $ψ (2 S) \to γ χ_{c 0}$ decay is presented using a sample of 14 million $ψ (2 S)$ events accumulated by the BES II detector. The data…

hep-ex2005★ 9 cited

Experimental study of \etac decays into vector-vector final states

M. Ablikim

Using 58 million J/ψevents accumulated with the BES II detector, branching fractions for the η_{c} ->VV decays, η_{c} -> ρρ, η_{c} -> K^{*}{\bar K}^{*}, η_{c} -> ωω, and η_{c} -> ϕ…

hep-ex2005★ 15 cited

Obervation of χ_{cJ}--> omega omega decays

BES Collaboration, M. Ablikim

Decays of $χ_{c0,2}\ar\ww$ are observed for the first time using a sample of $14.0 \times 1 0^{6}$ $ψ (2 S)$ events collected with the BESII detector. The branching ratios are determined…

hep-ex2005★ 36 cited

Study of J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar

BES Collaboration, M. Ablikim

The branching ratios and Angular distributions for J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar are measured using BESII 58 million J/psi.

hep-ex2005★ 20 cited

Precise measurement of spin-averaged chi_{cJ}(1P) mass using photon conversions in psi(2S) -> gamma chi_{cJ}

M. Ablikim, J. Z. Bai

Using photon conversions to e^+e^- pairs, the energy spectrum of inclusive photons from psi(2S) radiative decays is measured by BESII at the Beijing Electron-Positron Collider. The…

hep-ex2004★ 7 cited

Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta

M. Ablikim

Based on a sample of 5.8X 10^7 J/psi events taken with the BESII detector, the branching fractions of J/psi--> 2(pi+pi-)eta and J/psi-->3(pi+pi-)eta are measured for the first time…

hep-ex2004★ 280 cited

Resonances in $J / ψ \to ϕ π^{+} π^{-}$ and $ϕ K^{+} K^{-}$

M. Ablikim

A partial wave analysis is presented of $J / ψ \to ϕ π^{+} π^{-}$ and $ϕ K^{+} K^{-}$ from a sample of 58M $J / ψ$ events in the BES II detector. The $f_{0} (980)$ is observed clearly in both sets of…

hep-ex2004★ 29 cited

Measurement of the final states $ω π^{0}$ , $ρ η$ , and $ρ η^{^{'}}$ from $\psip$ electromagnetic decays and $\ee$ annihilations

M. Ablikim

Cross sections and form factors for $\ee \to \wpi$, $ρ η$ , and $ρ\etap$ at center of mass energies of 3.650, 3.686, and 3.773 GeV are measured using data samples collected with the…

hep-ex2004★ 19 cited

Search for K_S K_L in psi'' decays

M. Ablikim

K_S K_L from psi'' decays is searched for using the psi'' data collected by BESII at BEPC, the upper limit of the branching fraction is determined to be B(psi''--> K_S K_L) < 2.1\t…

hep-ex2004★ 3 cited

First Measurement of the Branching Ratio of $J / ψ \to γ f_{2} (1270) f_{2} (1270)$

BES Collaboration, M. Ablikim

Using 58 million $J / ψ$ events taken with the BES II detector at the Beijing Electron Positron Collider, a new decay mode $J / ψ \to γ f_{2} (1270) f_{2} (1270) \to γ π^{+} π^{-} π^{+} π^{-}$ is obser…

hep-ex2004★ 19 cited

Measurements of $ψ (2 S)$ decays into $ϕ π^{0}$ , $ϕ η$ , $ϕ η^{^{'}}$ , $ω η$ , and $ω η^{^{'}}$

BES Collaboration

Decays of the $ψ (2 S)$ into Vector plus Pseudoscalar meson final states have been studied with 14 million $ψ (2 S)$ events collected with the BESII detector. Branching fractions of $ψ…

hep-ex2004★ 101 cited

Search for the Pentaquark State in $ψ (2 S)$ and $J / ψ$ Decays to $K_{S}^{0} p K^{-} n ˉ$ and $K_{S}^{0} p ˉ K^{+} n$

BES Collaboration, J. Z. Bai

Results are presented on $ψ (2 S)$ and $J / ψ$ hadronic decays to $K_{S}^{0} p K^{-} n ˉ$ and $K_{S}^{0} p ˉ K^{+} n$ final states from data samples of 14 million $ψ (2 S)$ and 58 million $J / ψ$ eve…

hep-ex2003★ 6 cited

Search for K_S K_S in J/psi and psi(2S) decays

J. Z. Bai, BES Collaboration

The CP violating processes J/psi-->K_S K_S and psi(2S)-->K_S K_S are searched for using samples of 58 million J/psi and 14 million psi(2S) events collected with the Beijing Spectro…

hep-ex2003★ 37 cited

Measurements of $ψ (2 S)$ decays into Vector- Tensor final states

J. Z. Bai et al

Decays of the $ψ (2 S)$ into vector plus tensor meson final states have been studied with 14 million $ψ (2 S)$ events collected with the BESII detector. Branching fractions of $ψ(2S) \…

hep-ex2003★ 32 cited

First observation of psi(2S)-->K_S K_L

J. Z. Bai

The decay psi(2S)-->K_S K_L is observed for the first time using psi(2S) data collected with the Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC); the…

First measurements of J/Psi decays into Σ+Σˉ− and Ξ0Ξˉ0

Measurements of J/ψdecays into ωK \bar{K} πand ϕK \bar{K} π

Measurements of J/ψ and ψ(2S) decays into ΛΛˉπ0 and ΛΛˉη

Measurements of the continuum Ruds​ and R values in e+e− annihilation in the energy region between 3.650 and 3.872 GeV

Improved measurement of ψ(2S) decays into τ+τ−

Measurements of the braching fractions for psi(3770)--> D0D0-bar,D+D-,DD-bar$ and the resonance parameters of psi(3770) and psi(2S)

Pseudoscalar production at omega omega threshold in J/psi -> gamma omega omega

Measurement of chi_cJ Decays to 2(pi^+pi^-)ppbar Final States

Measurement of branching fractions for the inclusive Cabibbo-favored ~K*0(892) and Cabibbo-suppressed K*0(892) decays of neutral and charged D mesons

Partial Wave Analysis of χc0​→π+π−K+K−

Experimental study of \etac decays into vector-vector final states

Obervation of χ_{cJ}--> omega omega decays

Study of J/psi decays to Lambda Lambdabar and Sigma0 Sigma0bar

Precise measurement of spin-averaged chi_{cJ}(1P) mass using photon conversions in psi(2S) -> gamma chi_{cJ}

Measurements of J/psi Decays into 2(pi+pi-)eta and 3(pi+pi-)eta

Resonances in J/ψ→ϕπ+π− and ϕK+K−

Measurement of the final states ωπ0, ρη, and ρη′ from $\psip$ electromagnetic decays and $\ee$ annihilations

Search for K_S K_L in psi'' decays

First Measurement of the Branching Ratio of J/ψ→γf2​(1270)f2​(1270)

Measurements of ψ(2S) decays into ϕπ0, ϕη, ϕη′, ωη, and ωη′

Search for the Pentaquark State in ψ(2S) and J/ψ Decays to KS0​pK−nˉ and KS0​pˉ​K+n

Search for K_S K_S in J/psi and psi(2S) decays

Measurements of ψ(2S) decays into Vector- Tensor final states

First observation of psi(2S)-->K_S K_L

First measurements of J/Psi decays into $Σ^{+} Σ ˉ^{-}$ and $Ξ^{0} Ξ ˉ^{0}$

Measurements of $J / ψ$ and $ψ (2 S)$ decays into $Λ Λ ˉ π^{0}$ and $Λ Λ ˉ η$

Measurements of the continuum $R_{uds}$ and $R$ values in $e^{+} e^{-}$ annihilation in the energy region between 3.650 and 3.872 GeV

Improved measurement of $ψ (2 S)$ decays into $τ^{+} τ^{-}$

Measurement of branching fractions for the inclusive Cabibbo-favored ~K0(892) and Cabibbo-suppressed K0(892) decays of neutral and charged D mesons

Partial Wave Analysis of $χ_{c 0} \to π^{+} π^{-} K^{+} K^{-}$

Resonances in $J / ψ \to ϕ π^{+} π^{-}$ and $ϕ K^{+} K^{-}$

Measurement of the final states $ω π^{0}$ , $ρ η$ , and $ρ η^{^{'}}$ from $\psip$ electromagnetic decays and $\ee$ annihilations

First Measurement of the Branching Ratio of $J / ψ \to γ f_{2} (1270) f_{2} (1270)$

Measurements of $ψ (2 S)$ decays into $ϕ π^{0}$ , $ϕ η$ , $ϕ η^{^{'}}$ , $ω η$ , and $ω η^{^{'}}$

Search for the Pentaquark State in $ψ (2 S)$ and $J / ψ$ Decays to $K_{S}^{0} p K^{-} n ˉ$ and $K_{S}^{0} p ˉ K^{+} n$

Measurements of $ψ (2 S)$ decays into Vector- Tensor final states