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ZFITTER v.6.21 - A Semi-Analytical Program for Fermion Pair Production in e+e- Annihilation
High Energy Physics - Phenomenology · Submitted 23 Aug 1999
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We describe ZFITTER, a Fortran program based on a semi-analytical approach to fermion pair production in e+e- annihilation at a wide range of centre-of-mass energies, including the PETRA, TRISTAN, LEP1/SLC, and LEP2 energies.
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The abstract, sentence by sentence
We describe ZFITTER, a Fortran program based on a semi-analytical approach to fermion pair production in e+e- annihilation at a wide range of centre-of-mass energies, including the PETRA, TRISTAN, LEP1/SLC, and LEP2 energies. A flexible treatment of complete O(alpha) QED corrections and of some higher order contributions is made possible with three calculational chains containing different realistic sets of restrictions in the photon phase space. Numerical integrations are at most one-dimensional. Complete O(alpha) weak loop corrections supplemented by selected higher-order terms may be included. The program calculates Delta r, the Z width, differential cross-sections, total cross-sections, integrated forward-backward asymmetries, left-right asymmetries, and for tau pair production also final-state polarization effects. Various interfaces allow fits to be performed with different sets of free parameters.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We describe ZFITTER, a Fortran program based on a semi-analytical approach to fermion pair production in e+e- annihilation at a wide range of centre-of-mass energies, including the PETRA, TRISTAN, LEP1/SLC, and LEP2 energies. | contribution 0.96 | 0.78 | 0.18 | asserted 1.00 |
| s1 | A flexible treatment of complete O(alpha) QED corrections and of some higher order contributions is made possible with three calculational chains containing different realistic sets of restrictions in the photon phase space. | method 0.98 | 0.80 | 0.07 | asserted 0.59 |
| s2 | Numerical integrations are at most one-dimensional. | method 0.95 | 0.75 | 0.04 | asserted 1.00 |
| s3 | Complete O(alpha) weak loop corrections supplemented by selected higher-order terms may be included. | method 0.88 | 0.59 | 0.05 | hedged possibility 0.99 |
| s4 | The program calculates Delta r, the Z width, differential cross-sections, total cross-sections, integrated forward-backward asymmetries, left-right asymmetries, and for tau pair production also final-state polarization effects. | contribution 0.90 | 0.81 | 0.13 | asserted 1.00 |
| s5 | Various interfaces allow fits to be performed with different sets of free parameters. | method 0.59 | 0.71 | 0.05 | asserted 0.99 |
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The paper
Original abstract
We describe ZFITTER, a Fortran program based on a semi-analytical approach to fermion pair production in e+e- annihilation at a wide range of centre-of-mass energies, including the PETRA, TRISTAN, LEP1/SLC, and LEP2 energies. A flexible treatment of complete O(alpha) QED corrections and of some higher order contributions is made possible with three calculational chains containing different realistic sets of restrictions in the photon phase space. Numerical integrations are at most one-dimensional. Complete O(alpha) weak loop corrections supplemented by selected higher-order terms may be included. The program calculates Delta r, the Z width, differential cross-sections, total cross-sections, integrated forward-backward asymmetries, left-right asymmetries, and for tau pair production also final-state polarization effects. Various interfaces allow fits to be performed with different sets of free parameters.
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References
How later papers used it
68 later papers cite it
5 later papers by other authors are listed below: 5 used its method or tool. 1 more paper by the same authors is listed: 1 used its method or tool.
Uses its method or tool 6 of 38 papers with this label · 1 by the same authors
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Now we complete them with explicit formulas of Improved Born Approximation (IBA), which includes electroweak (EW) corrections as in the formalism outlined in [ref] .
TauSpinner algorithms for including spin and New Physics effects in $\bar q q \rightarrow Z/\gamma^* \to \tau \tau$ process (2025) · Introduction · 0.80
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Obtained its one-loop Standard Model results using ZFITTER from this paper and SMATASY, which also accounts for phase space factors for massive final-state fermions.
Hypercharge-Universal Topcolor (2007) · 1.00 · paraphrased: the licence does not allow quoting
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Used the DIZET library of O(alpha) electroweak corrections and a method of inserting electroweak corrections into Born-like parts of spin amplitudes essentially the same as in this paper.
QED Interference in Charge Asymmetry Near the Z Resonance at Future Electron-Positron Colliders (2018) · 1.00 · paraphrased: the licence does not allow quoting
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Employed the so called Improved Born Approximation of this paper.
The TauSpinner approach for electroweak corrections in LHC Z to ll observables (2018) · 0.87 · paraphrased: the licence does not allow quoting
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Obtained its Standard Model predictions using ZFITTER of this paper, which requires input values for M_Z, M_t, m_H, alpha_s(M_Z), and Delta alpha_had^(5).
Fermionic Effective Operators and Higgs Production at a Linear Collider (2007) · 1.00 · paraphrased: the licence does not allow quoting
By the same authors
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are complete in $^(2)_0(p)$ up to 2-loops, while the EW corrections are taken from DIZET 6.21 [ref] (i.e. they are at 1+1/2 loops), exactly according to the prescription shown in eqs.
Standard Model Theory for the FCC-ee Tera-Z stage (2018) (same authors) · Introduction · 0.97
How the literature uses it
63 arXiv papers cite this in 107 sentences
Papers citing it · 54 sentences without a confident label
Uses its method or tool 35 papers
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We calculate theoretical predictions using ZFITTER 6.43 [ref] and ZEFIT 6.10 [ref] which we modified for a $Z'$ with free couplings to the b-quark and the electron.
New Vector Boson Near the Z-pole and the Puzzle in Precision Electroweak Data · Introduction · 0.85
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We calculate theoretical predictions using ZFITTER 6.43 [ref] and ZEFIT 6.10 [ref] which we modified for a $Z'$ with free couplings to the b-quark and the electron.
Z' near the Z-pole · Numerical analysis · 0.99
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Now we complete them with explicit formulas of Improved Born Approximation (IBA), which includes electroweak (EW) corrections as in the formalism outlined in [ref] .
TauSpinner algorithms for including spin and New Physics effects in $\bar q q \rightarrow Z/\gamma^* \to \tau \tau$ process · Introduction · 0.80
Uses its data or values 4 papers
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The experimental value of $g_L^bb̅$ is derived from measurements of $R_b$, the ratio of the $Z→b b̅$ width to the width of the hadronic decays, and $A_b$, the forward-backward asymmetry for $Z$ decays into $bb̅$ [ref] : [equation] The SM value was computed using ZFITTER [ref] in Ref. [ref] , leading to [equation] while the LW prediction is given by Eq. ([ref]) and Eq. ([ref]).
Custodial Isospin Violation in the Lee-Wick Standard Model · Constraints from the $Z b_L b̅_L$ Coupling · 0.96
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The precision of the IFI calculations quoted at the end of the LEP era was $δ≃0.1%$ at the $Z$ peak and $δ≃0.3%$ far away from the $Z$ resonance; see Refs. [ref] .
QED Interference in Charge Asymmetry Near the Z Resonance at Future Electron-Positron Colliders · Introduction · 0.89
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In what follows we will employ $g_L^u=0.34674$, $g_R^u=-0.15470$, $g_L^d=-0.42434$, $g_R^d=0.077345$ [ref] , and $A_e=0.1462$ [ref] .
Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests · Introduction · 0.99
Compares with it 3 papers
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For the evaluation of IFI component ambiguities an additional comparison [ref] with the semi-analytical code ZFITTER [ref] was used.
Multi-photon Monte Carlo event generator KKMCee for lepton and quark pair production in lepton colliders · The evolution of the code · 0.90
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To verify the correctness of the results, first of all, we check the Ward identities and the independence of scalar form factors on the gauge parameters, and secondly, we perform extensive numerical comparisons of our results with independent calculations known in the literature: with ZFITTER [ref] , FeynArts [ref] , the GRACE system [ref] , the topfit program [ref] , etc.
Standard Model Theory for the FCC-ee Tera-Z stage · The SANC project · 0.99
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In this section, we show numerical comparisons between GRIFFIN and the Dizet library of EW radiative corrections [ref] for the EWPOs and the differential cross-section.
GRIFFIN: A C++ library for electroweak radiative corrections in fermion scattering and decay processes · Sample results and comparisons · 1.00
Cites it as background 4 papers
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We recall conventions from [ref] .
The TauSpinner approach for electroweak corrections in LHC Z to ll observables · Improved Born Approximation · 0.86
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The computer package DIZET was created as electroweak and QCD library of the ZFITTER program [ref] which was one of the main tools for the high-precision verification of the Standard Model at LEP [ref] .
Computer package DIZET v. 6.45 · Introduction · 0.84
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All this is described in much detail in the published program versions [ref] and in the theoretical papers quoted therein.
Standard Model Theory for the FCC-ee Tera-Z stage · Introduction · 0.88
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