Precision Measurement of the Decay Σ + → p γ in the Process J / ψ → Σ + Σ ¯ −
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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Engineering topics
Chen, Y. B.
Publications and source records attributed to Chen, Y. B..
Precision measurement of the matrix elements for η → π + π − π 0 and η → π 0 π 0 π 0 decays
Not Available
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
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.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Observation of the decay χ c J → Ω − Ω ¯ +
Not Available
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Observation of the Y ( 4230 ) and evidence for a new vector charmoniumlike state Y ( 4710 ) in e + e − → K S 0 K S 0 J / ψ
Not Available
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
First direct measurement of the absolute branching fraction of Σ + → Λ e + ν e
Not Available
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗