Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-08-25
Comput.Phys.Commun. 88 (1995) 89-108
Physics
High Energy Physics
High Energy Physics - Phenomenology
25 pages (LaTeX), 5 figures, 1 table, see also http://www-zeuthen.desy.de/~riemann/ or http://hpl3sn02.cern.ch/homepages/gru
Scientific paper
10.1016/0010-4655(95)00016-9
SMATASY is an interface for the ZFITTER package and may be used for the model independent description of the Z resonance at LEP 1 and SLC. It allows the determination of the Z mass and width and its resonance shape parameters r and j for cross-sections and their asymmetries. The r describes the peak height and j the interference of the Z resonance with photon exchange in each scattering channel and for $\sigma_T$, $\sigma_{FB}$, $\sigma_{lr}$, $\sigma_{pol}$ etc. separately. Alternatively, the helicity amplitudes for a given scattering channel may be determined. We compare our formalism with other model independent approaches. The model independent treatment of QED corrections in SMATASY is applicable also far away from the Z peak.
Kirsch Stephane
Riemann Tord
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