Two-photon exchange to proton electromagnetic properties in time-like region

CHEN Dian-Yong; ZHOU Hai-Qing; DONG Yu-Bing

doi:10.1088/1674-1137/33/12/049

Chinese Physics C> 2009, Vol. 33> Issue(12) : 1336-1339 DOI: 10.1088/1674-1137/33/12/049

Two-photon exchange to proton electromagnetic properties in time-like region

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Abstract：
The contributions of two-photon exchange in the process e⁺+e^－→p+p including N and Δ intermediate states are estimated in a simple hadronic model. The corrections to the unpolarized cross section as well as to the polarized observables P_x and P_z are evaluated. The results show the corrections to unpolarized cross section are small and the angle dependence becomes weak at small s after considering the N and Δ(1232) contributions simultaneously, while the correction to P_z is enhanced.

References

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CHEN Dian-Yong, ZHOU Hai-Qing and DONG Yu-Bing. Two-photon exchange to proton electromagnetic properties in time-like region[J]. Chinese Physics C, 2009, 33(12): 1336-1339. doi: 10.1088/1674-1137/33/12/049

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Received: 2009-08-07
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Two-photon exchange to proton electromagnetic properties in time-like region

Corresponding author: CHEN Dian-Yong,

Received Date: 2009-08-07

Accepted Date: 1900-01-01

Available Online: 2009-12-05

Abstract:

The contributions of two-photon exchange in the process e⁺+e^－→p+p including N and Δ intermediate states are estimated in a simple hadronic model. The corrections to the unpolarized cross section as well as to the polarized observables P_x and P_z are evaluated. The results show the corrections to unpolarized cross section are small and the angle dependence becomes weak at small s after considering the N and Δ(1232) contributions simultaneously, while the correction to P_z is enhanced.

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Two-photon exchange to proton electromagnetic properties in time-like region

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