Engineering topics
Cheng, W.
Publications and source records attributed to Cheng, W..
Precision Measurement of the Branching Fractions of η ′ Decays
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Measurement of the branching fraction of J / ψ → ω η ′ π + π − and search for J / ψ → ω X ( 1835 ) , X ( 1835 ) → η ′ π + π − decay
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Measurement of the Dynamics of the Decays D s + → η ( ' ) e + ν e
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Study of electromagnetic Dalitz decays χ c J → μ + μ - J / ψ
Using 4.48 × 10 8 ψ (3686) events collected with the BESIII detector, we search for the decays χ cJ → μ + μ – J/ψ through the radiative decays ψ(3686) → γχ cJ , where J = 0,1,2. The decays χ c1,2 → μ + μ – J/ψ are observed, and the corresponding branching fractions are measured to be B(χ c1 → μ + μ – J/ψ) = (2.51 ± 0.18 ± 0.20) × 10 –4 and B(χ c2 → μ + μ – J/ψ) = (2.33 ± 0.18 ± 0.29) × 10 –4 , where the first uncertainty is statistical and the second one systematic. No significant χ c0 → μ + μ – J/ψ decay is observed, and the upper limit on the branching fraction is determined to be 2.0×10 –5 at 90% confidence level. Furthermore, we present a study of dimuon invariant mass dependent transition form factor for the decays χ c1,2 → μ + μ – J/ψ.
Measurement of the absolute branching fractions of Λ c + → Λ η π + and Σ ( 1385 ) + η
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Observation of D s + → p n ¯ and confirmation of its large branching fraction
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Observation of ψ ( 3686 ) → p p ¯ η ′ and improved measurement of J / ψ → p p ¯ η ′
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First Measurement of the Form Factors in D s + → K 0 e + ν e and D s + → K * 0 e + ν e Decays
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Observation of D + → f 0 ( 500 ) e + ν e and Improved Measurements of D → ρ e + ν e
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Measurement of e + e − → K + K − cross section at s = 2.00 – 3.08 GeV
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Observation of OZI-suppressed decays χ c J → ω ϕ
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Study of the decay D 0 → K ¯ 0 π − e + ν e
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Study of the D 0 → K − μ + ν μ Dynamics and Test of Lepton Flavor Universality with D 0 → K − ℓ + ν ℓ Decays
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Measurements of e + e − → K S 0 K ± π ∓ π 0 and K S 0 K ± π ∓ η at center-of-mass energies from 3.90 to 4.60 GeV
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