Engineering topics
Hu, C.
Publications and source records attributed to Hu, C..
Observation of the electromagnetic doubly OZI-suppressed decay J / ψ → ϕ π 0
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Measurement of B ( ψ ( 3770 ) → γ χ c 1 ) and search for ψ ( 3770 ) → γ χ c 2
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Measurements of ψ ( 3686 ) → K − Λ Ξ ¯ + + c . c . and ψ ( 3686 ) → γ K − Λ Ξ ¯ + + c . c .
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Study of e + e − → ω χ c J at Center of Mass Energies from 4.21 to 4.42 GeV
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Search for the Y ( 4140 ) via e + e − → γ ϕ J / ψ at s = 4.23 , 4.26 and 4.36 GeV
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Observation of e + e − → π 0 π 0 h c and a Neutral Charmoniumlike Structure Z c ( 4020 ) 0
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Conceptual design of a fast-ion D-alpha diagnostic on experimental advanced superconducting tokamak
To investigate the fast ion behavior, a fast ion D-alpha (FIDA) diagnostic system has been planned and is presently under development on Experimental Advanced Superconducting Tokamak. The greatest challenges for the design of a FIDA diagnostic are its extremely low intensity levels, which are usually significantly below the continuum radiation level and several orders of magnitude below the bulk-ion thermal charge-exchange feature. Moreover, an overlaying Motional Stark Effect (MSE) feature in exactly the same wavelength range can interfere. The simulation of spectra code is used here to guide the design and evaluate the diagnostic performance. The details for the parameters of design and hardware are presented.
Study of e + e - → p p ¯ π 0 in the vicinity of the ψ ( 3770 )
The process e + e - →pp¯π 0 has been studied by analyzing data collected at √s=3.773 GeV, at s√=3.650 GeV, and during a ψ(3770) line shape scan with the BESIII detector at the BEPCII collider. The Born cross section of pp¯π 0 in the vicinity of the ψ(3770) is measured, and the Born cross section of ψ(3770)→pp¯π 0 is extracted considering interference between resonant and continuum production amplitudes. Two solutions with the same probability and a significance of 1.5σ are found. The solutions for the Born cross section of ψ(3770)→pp¯π 0 are 33.8±1.8±2.1 pb and 0.06 +0.10 -0.04 +0.01 -0.01 pb (<0.22 pb at a 90% confidence level). Using the estimated cross section and a constant decay amplitude approximation, the cross section σ(pp¯→ψ(3770)π 0 ) is calculated for the kinematic situation of the planned P¯ANDA experiment. The maximum cross section corresponding to the two solutions is expected to be less than 0.79 nb at 90% confidence level and 122±10 nb at a center-of-mass energy of 5.26 GeV.
Measurement of the D → K − π + strong phase difference in ψ ( 3770 ) → D 0 D ¯ 0
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