Engineering topics
Gao, Y. N.
Publications and source records attributed to Gao, Y. N..
Study of Λ c + → Λ μ + ν μ and test of lepton flavor universality with Λ c + → Λ ℓ + ν ℓ decays
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Measurement of e + e − → ϕ π + π − cross sections at center-of-mass energies from 2.00 to 3.08 GeV
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Determination of the C P -even fraction of D 0 → K S 0 π + π − π 0
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Cross-section measurements of e + e − → ϕ K + K − and e + e − → ϕ K S 0 K S 0 at center-of-mass energies between 3.7730 GeV and 4.7008 GeV
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Measurement of the absolute branching fraction of the inclusive decay Λ ¯ c − → n ¯ + X
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Measurement of the absolute branching fraction of the inclusive decay D s + → π + π + π − X
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Search for baryon and lepton number violating decays of Ξ 0 hyperons
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First simultaneous measurement of Ξ 0 and Ξ ¯ 0 asymmetry parameters in ψ ( 3686 ) decay
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First Study of Reaction Ξ 0 n → Ξ − p Using Ξ 0 -Nucleus Scattering at an Electron-Positron Collider
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Improved measurement of the branching fractions of the inclusive decays D + → K S 0 X and D 0 → K S 0 X
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Search for the semi-leptonic decays Λ c + → Λ π + π - e + ν e and Λ c + → p K S 0 π - e + ν e
We search for the semi-leptonic decays $Λ^+_c$ → Λπ + π - e + ν e and $Λ^+_c$ → p$K^0_S$π - e + ν e in a sample of 4.5 fb -1 of e + e - annihilation data collected in the center-of-mass energy region between 4.600 GeV and 4.699 GeV by the BESIII detector at the BEPCII. No significant signals are observed, and the upper limits on the decay branching fractions are set to be B($Λ^+_c$ → Λπ + π - e + ν e ) < 3.9 × 10 -4 and B($Λ^+_c$ → p$K^0_S$π - e + ν e ) < 3.3 × 10 -4 at the 90% confidence level, respectively
Measurements of Normalized Differential Cross Sections of Inclusive π 0 and K S 0 Production in e + e − Annihilation at Energies from 2.2324 to 3.6710 GeV
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Measurement of e + e − → Λ Λ ¯ η from 3.5106 to 4.6988 GeV and study of Λ Λ ¯ mass threshold enhancement
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Precision Measurement of the Decay Σ + → p γ in the Process J / ψ → Σ + Σ ¯ −
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Precision measurement of the matrix elements for η → π + π − π 0 and η → π 0 π 0 π 0 decays
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Helicity amplitude analysis of χcJ → ϕϕ
Using (447.9 ± 2.3) million ψ(3686) events collected with the BESIII detector, the decays of χcJ → ΦΦ (J = 0, 1, 2) have been studied via the decay ψ(3686) → γχcJ. The branching fractions of the decays χcJ → ΦΦ (J = 0, 1, 2) are determined to be (8.59 ± 0.27 ± 0.20) × 10-4, (4.26 ± 0.13 ± 0.15) × 10-4, and (12.67 ± 0.28 ± 0.33) × 10-4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ(3686) → γχcJ , χcJ → ΦΦ, Φ → K+K-, the polarization parameters of the χcJ → ΦΦ decays are determined for the first time.