The webpage has been migrated in March 2013 from to

     Private homepage  
     Dr. Tord Robert Riemann  
     Retired (1 December 2016) from research staff at DESY, Zeuthen location, Theory Group  


"Zwei Dinge erfüllen das Gemüth mit immer neuer und zunehmender Bewunderung und Ehrfurcht, je öfter und anhaltender sich das Nachdenken damit beschäftigt: der bestirnte Himmel über mir und das moralische Gesetz in mir.
Beide darf ich nicht als in Dunkelheiten verhüllt, oder im Überschwenglichen, außer meinem Gesichtskreise suchen und blos vermuthen; ich sehe sie vor mir und verknüpfe sie unmittelbar mit dem Bewusstsein meiner Existenz."
Immanuel Kant, Kritik der praktischen Vernunft, Beschluß (Riga 1788)

Sabine u. Tord  Riemann, NYC 2005

Dr. Tord Riemann



See also German Wikipedia.
Prof. Dr. Albrecht Wagner: Note on occasion of Tord Riemann's 25 years of service at IfH/DESY on 1 March 2002 (in German)
Talk by J. Gluza, Zeuthen, Germany, 23 June 2011: "The Bhabha Project"

Tord Riemann, CV Summary 2015
Tord Riemann, Curriculum Vita 2015
Spires Citesummary Tord Riemann


inSPIRE search search
Tord Riemann, Publications 2015

The ZFITTER project

The official webpage of the ZFITTER collaboration has changed in 2015:

The Report of the Ombuds-Kollegium of Hamburg University (17 November 2015) is available on justified request.

The Foundation for Polish Science has awarded to Tord Riemann the Alexander von Humboldt Polish Honorary Research Fellowship that is being carried out at University of Silesia in cooperation with the host prof. Janusz Gluza. Reference:>.



Conferences and Advanced Schools:

Founder and from 1992 to 2016 organizer of the bi-annual workshop series Conference "Loops and Legs in Quantum Field Theory"
The "Loops and Legs" series was organized 1992 till 1996 with changing workshop titles and got its name in 1998.
The "Loops and Legs" workshop series seems to be interrupted in 2020 and might hopefully be re-activated in 2022.

2005 - 2015: Co-organizer of the bi-annual series of advanced DESY Schools

Scientific Fields of Interest:

Conference Talks and Lectures at Advanced Schools:

Talks before 2008: More Talks

Ph.D Students:

See the Mathematics Genealogy Project: Tord Riemann. The last two students are in processing there (17 Dec 2019).

Diploma Students:

2001 First Prize of the Joint Institute for Nuclear Research, Dubna

awarded January 19, 2001 by the Scientific Council of the JINR Dubna for the project
"Theoretical support of experiments at the Z resonance on precision tests of the standard model (Project ZFITTER)"

An old story: LFV Z decays

Here you may find some references from the Eighties on flavor-nondiagonal Z-boson decays in the Standard Model (with massive, mixing neutrinos or top quarks in the loop).

Some Fortran programs:

Because there happened misunderstandings about the conditions of use of open-source software, it might not be appropriate to further distribute software using this platform. All the corresponding links have been deactivated. In some cases you may find the programs of interest in the program repository of "Computer Physics Communications", or you may contact me [ or co-authors] directly.

  1. ZFITTER - A Program for the Semi-Analytic Calculation of Predictions for the Process e+e- -> 2f
    click here for the DESY ZFITTER home page.
    The earlier zfitter homepage has been relocated to

  2. topfit - A Program for the Semi-Analytic Calculation of Predictions for the Process e+e- -> t bar-t (+ photon)
    Authors: J. Fleischer, A. Leike, T. Riemann, A. Werthenbach
    preprint DESY 02-204, March 2003
    e-Print Archive: hep-ph/0302259
    Click here for the DESY, Zeuthen topfit homepage

  3. GENTLE/4fan - A Program for the Semi-Analytic Calculation of Predictions for the Process e+e- -> 4f
    Authors: D. Bardin, J. Biebel, D. Lehner, A. Leike, A. Olchevski, T. Riemann
    Published in Comput. Phys. Commun. 104 (1997) 161-187
    preprint DESY 96-233, December 1996
    e-Print Archive: hep-ph/9612409
    Click here for the DESY, Zeuthen GENTLE homepage:
    See also for J. Biebel's project ZAC on anomalous ZZZ and ZZA couplings in the Process e+e- -> 4f

  4. Predictions for Anomalous tau+ tau- gamma Production at LEP 1
    Authors: Jochen Biebel and Tord Riemann
    Published in Z. Phys. C76 (1997) 53-58
    preprint DESY 96-212, October 1996, 13pp.
    e-Print Archive: hep-ph/9610437
    Click here for the program: anotau.f

  5. HECTOR 1.00 - A program for the calculation of QED, QCD and electroweak corrections to ep and lN deep inelastic neutral and charged current scattering
    Authors: A. Arbuzov, D. Bardin, J.Bluemlein, P. Christova, L. Kalinovskaya, T. Riemann
    Picture (Caution: 1.9 Mb!)
    click here for the DESY, Zeuthen HECTOR home page
    Comput. Phys. Commun. 94 (1996) 128-184, hep-ph/9511434 DESY 95-185
    Source code
    Additional applications are possible with v.1.11; see:
    DESY 96-189 (spin physics)
    DESY 96-213 (tagged photons)
    New beta version of the source code

  6. SMATASY: a program for the model independent description of the Z resonance
    Authors since version 5.02: Martin Gruenewald, Stefan Kirsch and Tord Riemann
    Preprint DESY 94-125 [hep-ph/9408365];
    Preprint publ. in Comput. Phys. Commun. 88 (1995) 89
    Find here version 6.10 (15 May 1999), running with ZFITTER v.6.10:
    /afs/ /smatasy /smata6_10.fortran
    This version runs together with ZFITTER_beta (Feb 1997), click here: zfitr_beta_02_1997.uu
    SMATASY (May 1998) runs together with ZFITTER v. 5_1 (March 1998), click here: smata5_10.fortran and here: zfitr_beta_02_1997.uu
    The SMATASY code may be found here. In March 2000, the last one is here.

Email: Tord Robert Riemann, return webpage:, Last modified:
Mi 15. Jan 18:10:55 CET 2020
Sa 21. Dez 18:55:32 CET 2019

Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. © 1990-2020 by Tord R. Riemann