The processes $e^-e^+\toγγ, Z γ, ZZ$ in SM and MSSM

Details The processes $e^-e^+\toγγ, Z γ, ZZ$ in SM and MSSM The processes $e^-e^+\toγγ, Z γ, ZZ$ in SM and MSSM

2002-11-21

arxiv.org/abs/hep-ph/0211327v1

Phys.Rev.D67:013012,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

Short version (16 pages and 9 figures) of the paper hep-ph/0207273, to appear in Phy.Rev.D. e-mail: renard@lpm.univ-montp2.fr

Scientific paper

10.1103/PhysRevD.67.013012

We present the results of a complete analysis of the one loop electroweak corrections to $e^-e^+\to\gamma\gamma, ~Z\gamma, ~ZZ$ in the Standard (SM) and the Minimal Supersymmetric Standard Model (MSSM). A special emphasis is put on the high energy behaviour of the various helicity amplitudes and the way the logarithmic structure is generated. The large magnitude of these effects, which induce striking differences between the SM and MSSM cases at high energies, offers the possibility of making global tests which could check the consistency of these models, and even decide whether any additional new physics is required.

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