Search Results - "Ke, Z.J."
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Evidence of ψ(3770) non-DD¯ decay to J/ψπ+π
Published in Physics letters. B (06-01-2005)“…Evidence of ψ(3770) decays to a non-DD¯ final state is observed. A total of 11.8±4.8±1.3ψ(3770)→J/ψπ+π− events are obtained from a data sample of 27.7 pb−1…”
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2
Measurements of the mass and full-width of the ηc meson
Published in Physics letters. B (06-03-2003)“…In a sample of 58 million J/ψ events collected with the BES II detector, the process J/ψ→γηc is observed in five different decay channels: γK+K−π+π−,…”
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3
Partial wave analysis of J/ ψ→ γ( π+π−π+π−)
Published in Physics letters. B (2000)“…BES data on J/ ψ→ γ( π + π − π + π −) have been analyzed into partial waves. We fit with resonances having J PC =2 ++ at 1275 MeV, 0 ++ at 1500 MeV, 2 ++ at…”
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4
Search for lepton flavor violation process J/ψ→eμ
Published in Physics letters. B (22-05-2003)“…Using a sample of 5.8×107J/ψ events, the Beijing Spectrometer experiment has searched for the decay J/ψ→eμ. Four candidates, consistent with the estimated…”
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5
Partial wave analysis of J/ ψ→ γ( ηπ+π−)
Published in Physics letters. B (1999)“…A partial wave analysis of BES J/ ψ→ γ( ηπ + π −) data has been performed in the mass region 1.1 to 2.0 GeV. A peak is observed due to η(1440) in the ηπ + π −…”
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6
Evidence of ψ ( 3770 ) non- D D ¯ decay to J / ψ π + π
Published in Physics letters. B (01-01-2005)Get full text
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7
Partial wave analysis of J/ ψ→ γ( K+K−π+π−)
Published in Physics letters. B (2000)“…BES data on J/ ψ→ γ( K + K − π + π −) are presented. The K ∗ K ̄ ∗ contribution peaks strongly near threshold. It is fitted with a broad 0 −+ resonance with…”
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8
Charmonium Decays to Axial-Vector Plus Pseudoscalar Mesons
Published in Physical review letters (01-09-1999)Get full text
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9
Study of [formula omitted] production from [formula omitted]
Published in Physics letters. B (01-06-2001)“…Data are presented on the reaction J/ψ→p p ̄ η using 7.8×10 6 J/ψ triggers collected by the BEjing Spectrometer (BES). A partial wave analysis is performed. A…”
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10
Partial wave analysis of J/ ψ→ γ( K±KS0π∓)
Published in Physics letters. B (01-03-2000)“…BES data on J/ ψ→ γ( K ± K S 0 π ∓) are presented. There is a strong peak due to η(1440)/ ι, which is fitted with a Breit–Wigner amplitude with s-dependent…”
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Evidence for the leptonic decay D→μν
Published in Physics letters. B (01-06-1998)Get full text
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12
A measurement of [formula omitted] decay widths
Published in Physics letters. B (01-07-1995)“…The cross sections for e + e − → hadrons, e + e −, μ + μ − have been measured in the vicinity of the J Ψ resonance using the BES detector operated at BEPC. The…”
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13
Study of the hadronic decays of [chi][sub c] states
Published in Physical review. D, Particles and fields (01-10-1999)“…Hadronic decays of the [ital P]-wave spin-triplet charmonium states [chi][sub cJ](J=0,1,2) are studied using a sample of [psi](2S) decays collected by the BES…”
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14
Direct measurement of B ( D s + → φ X + )
Published in Physical review. D, Particles and fields (01-01-1998)Get full text
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