Precision Calculation Project Report

Abstract

The complete list of definitions for quantities relevant in the analysis of SLD/LEP-1 results around the Z-resonance is given. The common set of conventions adopted by the programs TOPAZ0 and ZFITTER, following the recommendations of the LEP electroweak working group, is reviewed. The relevance of precision calculations is discussed in detail both for pseudo-observables (PO) and for realistic observables (RO). The model-independent approach is also discussed. A critical assessment is given of the comparison between TOPAZ0 and ZFITTER.

Figures (16)

• Figure 1: Relative deviations between TOPAZ0 and ZFITTER for total fermionic cross-section. DD-mode is shown with SD-modes corresponding to no-cut or a $M^2(f\overline f)$-cut of $0.01\,s$.
• Figure 2: Absolute deviations between TOPAZ0 and ZFITTER for de-convoluted forward-backward asymmetries.
• Figure 3: Relative deviations between TOPAZ0 and ZFITTER for $\sigma(\mu)$, $A^{\mu}_{_{\rm FB}}$ and $\sigma(\rm had)$ for different values of the Higgs boson mass in SD no-cut mode.
• Figure 4: Relative deviations between TOPAZ0 and ZFITTER for muonic and hadronic cross-section in DD, SD, CA3 and CF3 modes. The last three are corresponding to a cut $M^2(f\overline f)$ of $0.01\,s$.
• Figure 5: Relative deviations between TOPAZ0 and ZFITTER for muonic and hadronic cross-section in DD, SD, CA3 and CF3 modes. The last three are corresponding to a cut on $s'$ of $0.01\,s$.