Analytical Helicity Amplitudes for Z→3γ and It's Related Processes and Discussion of Polarization Vectors

GOU Liang; DONG FangXiao; ZHOU XianJian

Chinese Physics C> 2000, Vol. 24> Issue(12) : 1098-1105

Analytical Helicity Amplitudes for Z→3γ and It's Related Processes and Discussion of Polarization Vectors

Institute of High Energy Physics, CAS, Beijing 100039, China

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Abstract：
The analytical helicity amplitudes for Z→3γ and it's related processes via w-loop and charged scalar loop are presented. There are some differences between our results and those in Glover paper for Z→3γ via w-loop and fermion loop. Although these differences do not contradict the result of total decay width for Z→3γ, but the different helicity amplitudes have measurable physical meanings. We discuss the definition of polarization vector and point out the error of Glover paper.

References

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GOU Liang, DONG FangXiao and ZHOU XianJian. Analytical Helicity Amplitudes for Z→3γ and It's Related Processes and Discussion of Polarization Vectors[J]. Chinese Physics C, 2000, 24(12): 1098-1105.

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Received: 1999-05-30
Revised: 1900-01-01

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