Chinese Physics C > 2006, Vol. 30 > Issue(8): 718-723

A Generator for Multipole Analysis of ψ′→γ′χ_cJ→γ′γJ/ψ

Institute of High Energy Physics, CAS, Beijing 100049, China2 CCASTWorld Laboratory, Beijing 100080, China

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Abstract：
To experimentally study the charmonium ψ′cascade radiative decay, ψ′→γ′χ _cJ→γ′γJ/ψ, a generator which describes correctly all angular distributions is a necessity. We can determine the photon multipolarities (or equivalently the helicity couplings) by analyzing the angular correlations. In this work, a generator with fulls description of angular distributions for such process will be introduced, as well as the measurement method of multipolarities will be discussed, which can be implemented at BESⅢ/BEPCⅡ or CLEOc.

References

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LI Gang, ZHU Yong-Sheng and WANG Zhi-Yong. A Generator for Multipole Analysis of ψ′→γ′χ _cJ→γ′γJ/ψ[J]. Chinese Physics C, 2006, 30(8): 718-723.

LI Gang, ZHU Yong-Sheng and WANG Zhi-Yong. A Generator for Multipole Analysis of ψ′→γ′χ _cJ→γ′γJ/ψ[J]. Chinese Physics C, 2006, 30(8): 718-723. shu

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Received: 2006-02-23
Revised: 2006-03-24

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沈阳化工大学材料科学与工程学院沈阳 110142

A Generator for Multipole Analysis of ψ′→γ′χ_cJ→γ′γJ/ψ

Corresponding author:LI Gang,

Institute of High Energy Physics, CAS, Beijing 100049, China2 CCASTWorld Laboratory, Beijing 100080, China

Received Date:2006-02-23
Accepted Date:2006-03-24
Available Online:2006-08-05

Abstract:To experimentally study the charmonium ψ′cascade radiative decay, ψ′→γ′χ_cJ→γ′γJ/ψ, a generator which describes correctly all angular distributions is a necessity. We can determine the photon multipolarities (or equivalently the helicity couplings) by analyzing the angular correlations. In this work, a generator with fulls description of angular distributions for such process will be introduced, as well as the measurement method of multipolarities will be discussed, which can be implemented at BESⅢ/BEPCⅡ or CLEOc.