SANC: the process γγ → ΖΖ
| Autor: | E. Uglov, D. Y. Bardin, W. von Schlippe, P. Christova, S. G. Bondarenko, L. V. Kalinovskaya |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Radiation Transversality 010308 nuclear & particles physics Scalar (mathematics) Mandelstam variables Gauge (firearms) 01 natural sciences Helicity Atomic and Molecular Physics and Optics Permutation 0103 physical sciences Radiology Nuclear Medicine and imaging Covariant transformation Tensor 010306 general physics |
| Zdroj: | Physics of Particles and Nuclei Letters. 14:811-816 |
| ISSN: | 1531-8567 1547-4771 |
| DOI: | 10.1134/s1547477117060061 |
| Popis: | The implementation of the process $\gamma\gamma \to ZZ$ at the one-loop level within {\tt SANC} system multi-channel approach is considered. The derived one-loop scalar form factors can be used for any cross channel after an appropriate permutation of their arguments -- Mandelstam variables $s,t,u$. To check of the correctness of the results we observe the independence of the scalar form factors on the gauge parameters and the validity of Ward identity (external photon transversality). We present the complete analytical results for the covariant and tensor structures and helicity amplitudes for this process. We make an extensive comparison of our analytical and numerical results with those existing in the literature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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