Contribution of One-Photon Annihilation at ψ(2S) in e<SUP>+</SUP>e<SUP>－</SUP> Experiment

WANG Ping; YUAN Chang-Zheng; MO Xiao-Hu

Chinese Physics C> 2003, Vol. 27> Issue(6) : 465-473

Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment

Institute of High Energy Physics, CAS, Beijing 100039, China2 China Center of Advanced Science and Technology, Beijing 100080, China

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Abstract：
The continuum one-photon annihilation at ψ(2S) in e⁺e^－ experiment is studied. Such contributions to the measured final states ωπ⁰ and π⁺π^－ at ψ(2S) mass are estimated by phenomenological models. It is found that these contributions must be taken into account in the determination of branching ratios of ψ(2S)→ωπ0 and ψ(2S)→π⁺π^－, as well as other electromagnetic decay modes. The study reaches the conclusion that in order to obtain the correct branching ratios on these decay modes at BES, at least 10pb^－1of data below the ψ(2S) peak is needed.

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WANG Ping, YUAN Chang-Zheng and MO Xiao-Hu. Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment[J]. Chinese Physics C, 2003, 27(6): 465-473.

WANG Ping, YUAN Chang-Zheng and MO Xiao-Hu. Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment[J]. Chinese Physics C, 2003, 27(6): 465-473. shu

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Received: 2002-09-12
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment

Corresponding author: WANG Ping,

Institute of High Energy Physics, CAS, Beijing 100039, China2 China Center of Advanced Science and Technology, Beijing 100080, China

Received Date: 2002-09-12

Accepted Date: 1900-01-01

Available Online: 2003-06-05

Abstract: The continuum one-photon annihilation at ψ(2S) in e⁺e^－ experiment is studied. Such contributions to the measured final states ωπ⁰ and π⁺π^－ at ψ(2S) mass are estimated by phenomenological models. It is found that these contributions must be taken into account in the determination of branching ratios of ψ(2S)→ωπ0 and ψ(2S)→π⁺π^－, as well as other electromagnetic decay modes. The study reaches the conclusion that in order to obtain the correct branching ratios on these decay modes at BES, at least 10pb^－1of data below the ψ(2S) peak is needed.

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Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment

Contribution of One-Photon Annihilation at ψ(2S) in e⁺e^－ Experiment