1995/12/14 by Dietrich Lehner, Lehner, Dietrich
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9512301
133 pages, 13 figures, full gzipped postscript available from http://www.ifh.de/~lehner/diss.ps.gz
arxiv created 1995/12/14 · openalex publication_date 1995/12/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A total and differential cross-section calculation for the Electroweak Standard Model reaction e+ e- → (Z0 Z0) → f1f1f2f2(γ) including the effects of the finite Z0 width and, for the first time, all QED initial state radiative corrections (ISR) is presented. A semi-analytical technique is used: All angular phase space integrations, five for the tree level process, seven if ISR is included, are carried out analytically. The remaining phase space variables are the invariant masses of the two decaying Z0 bosons for tree level plus the reduced center of mass energy squared in the ISR case. Invariant masses are submitted to high precision numerical integration. Semi-analytical and numerical results for e+ e- center of mass energies between √(s)=130GeV and 1TeV are reported. It is shown that the radiatively corrected cross-section splits into a universal, leading logarithm part with the tree level cross-section factorizing on one hand and a non-universal contribution on the other hand. A generalization to the case of Standard Model neutral boson pair production, e+ e- → (Z0 Z0, Z0 γ, γγ) → f1f1 f2f2(γ), is worked out in detail. The relevance of the presented calculation for the phenomenology of e+ e- collider physics is discussed, especially for W and Higgs physics both of which will be important topics in the near future. All significant technical details of the calculation are explained.