TheorieGruppe
Deutsches ElektronenSynchrotron
Ein Forschungszentrum der HelmholtzGemeinschaft
Platanenallee 6, 15738 Zeuthen, Germany
"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)
Dr. Tord Riemann
Contact:
Personalities:
 Since 1977 staff at Theory Group, DESY, Zeuthen, Germany
 9/19838/1987 Lab. for Theoretical Physics, JINR Dubna, Russia
 9/19918/1992 Theory Division, CERN, Geneva, Switzerland
Responsibilities:

Since 12/2013 Principal Investigator in Research Training Group "Mass, Spectrum, Symmetry
(GK 1504):
Particle Physics in the Era of the Large Hadron Collider"
 Since 05/2005 spokesperson of the ZFITTER project
Past:
 08/200907/2011, 4/20044/2008, 9/19938/1995 Spokesperson of Theory Group, DESY, Zeuthen
 20032014 Project Leader in SFB/TRR 9 of DFG, project B1:
"Precision calculations of massive particle production processes"
 12/200611/2010 Node coordinator, member of steering committee, and network task coordinator for "Tools" of TMR Network (RTN) of the
European Commission:
"HEPTOOLS  Tools and Precision Calculations for Physics Discoveries at Colliders"
 8/20007/2004 Node coordinator of TMR Network (RTN) of the European Commission: "Particle Physics Phenomenology at High Energy Colliders"
 199309  199606 Node coordinator of EUNEPHESMA, "Phenomenology of the Standard Model and alternatives for present and future high
energy colliders",
HCM project,
framework 3C
Lehre:
2006  2011: Vorlesungen zu "Theorie des Standardmodells und Colliderphysik" an der Universität Potsdam
Seit 2013: Vorlesungen zu "Theorie des Standardmodells und Colliderphysik" an der TU Dresden (TUD)
TUD, Wintersemester 2013/2014, siehe hier:
13/14.
TUD, Wintersemester 2014/2015, siehe hier:
14/15.
Conferences and Advanced Schools:
 CoChair of "Helmholtz International School  Workshop Calculations for Modern and Future Colliders", JINR, Dubna, Russia:
2012: CALC 2012
2009: CALC 2009
2006: CALC 2006
Member of Advisory Board
 Since 2005: "International Symposium on Radiative Corrections  Applications of Quantum Field Theory to Phenomenology (Radcor)"
For a list of meetings before 2011 see
here
 Since 2005: "Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT)"
For a webpage see
ACAT2005 at DESY, Zeuthen
 Since 2005: "Matter to the deepest", University of Silesia, Katowice, Ustron
For the 2007 webpage see
here
Coorganizing the biannual series

Conference "Loops and Legs in Quantum Field Theory"
LL 2014 in Weimar
Former events:
LL 1992 in Teupitz,
LL 1994 in Teupitz,
LL 1996 in Rheinsberg,
LL 1998 in Rheinsberg,
LL 2000 in Bastei/Königstein,
LL 2002 in Kloster Banz,
LL 2004 in Zinnowitz,
LL 2008 in Eisenach,
LL 2008 in Schloss Sondershausen,
LL 2010 in Woerlitzer Park,
LL 2012 in Wernigerode
 CAPP  DESY School "Computer Algebra and Particle Physics"
CAPP 2005,
CAPP 2007,
CAPP 2009,
CAPP 2011,
CAPP 2013
Scientific Fields of Interest:
 LHC physics
 Loop calculations
 NNLO Bhabha scattering in QED

Higher order corrections in the electroweak Standard Model
(and some extensions)

Phenomenology of elementary particles;
precision tests of fundamental interactions
 Linear Collider physics; Higgs, WW, ZZ, 2f and 4f
production in e+e scattering

HERA physics; QED and electroweak corrections for deep inelastic
scattering at HERA

Ethical and legal problems related to development and sharing of software in international academic basic research; see "Summary of
the ACAT Round Table Discussion: Opensource, knowledge sharing and scientific collaboration", with F. Carminati and D. PerretGallix, DESY
14079 (arXiv:1407.0540) and Journal of Physics: Conference Series 523 (2014) 0120 (ACAT
2014)

See also the homepages on
PHOKHARA,
BABAYAGA,
PJFry,
AMBRE,
Bhabha Scattering,
DIANA_aITALC,
ZFITTER,
HECTOR
Publications:
spires search
eprint archive
Conference Talks and Lectures at Advanced Schools:
Talk by J. Gluza on the occasion of the 60th birthday of Tord Riemann, 23 June 2011, Zeuthen, Germany:
"The Bhabha Project"
2015

"Smatrix approach to the Z line shape  A reminiscence. Prospects?",
Talk held at 9th FCCee (TLEP) Physics workshop (TLEP9), 35 February 2015, Scuola Normale Superiore, Pisa, Italy,
workshop page,
[.pdf].
2014

"Massive Feynman integrals and electroweak corrections",
Talk held at final meeting of Sonderforschungsbereich/Transregio 9 of DFG
"Advances in Computational Particle Physics" for Project Group B "Predictions for High Energy Reactions",
Project B1 "Precision Predictions for Massive Particle Production (2001114)",
1519 Sep 2014, AiCPP_2014, Durbach, Germany,
workshop page,
[.pdf].
Published in the proceedings: Nucl. Part. Phys. Proc. 261262 140154,
and
arXiv/1412.3311.

"Nonplanar Feynman diagrams and
MellinBarnes representations with AMBRE", Talk held at
16th Int. WS on Advanced Computing and Analysis Techniques in Physics Research (ACAT),
Faculty of Civil Engineering, Czech Technical University, 15 September 2014, Prague,
Track 3: Computations in Theoretical Physics: Techniques and Methods,
workshop page.
Published in the proceedings in the IOP Conference Series: J. Phys. Conf. Ser. 608(2015)1, 012070.

"Electroweak corrections for top@ILC: 2004  2014  2024",
Talk held at "Workshop on Top physics at the LC",
Session on electroweak couplings and higher order corrections,
LPNHE, Paris, France, 56 March, 2014,
workshop page,
[.pdf]
2013

"Contractions of 1loop 5point
tensor Feynman integrals", Talk held at Int. Conference
Matter to the Deepest
Recent Developments In Physics of Fundamental
Interactions,
Ustron, Poland, 16 Sep, 2013,
workshop page,
[.pdf]

"Replacing 1loop tensor reduction by contractions", Talk at
11th International Symposium on Radiative Corrections
 Applications of Quantum Field Theory to Phenomenology  RADCOR 2013, 22  27 Sep 2013, Lumley Castle,
workshop page,
[.pdf]

"Contractions of 1loop 5point tensor Feynman integrals",
Talk held at
ACAT2013  15th Int. WS on Advanced Computing
and Analysis Techniques in Physics Research
May 16  21, 2013, IHEP, Beijing, China
workshop page,
[.pdf]
Round Table Discussion at ACAT2013: "Opensource, knowledge sharing and scientific collaboration",
Speakers: Prof. Gang Chen (Institute of High Energy Physics), Dr. Tord Riemann (DESY), Dr. Denis PerretGallix (LAPP/IN2P3CNRS), Prof. Lawrence Pinsky (Physics Department, University of Houston), writeup: DESY 14079 (hepph/1407.0540)

"Feynman Integrals and MellinBarnes representations",
Talk held at
"Computer Algebra and Particle Physics", The
DESY CAPP School, 11 March  15 March 2013, Zeuthen, Germany
[.pdf]
2012

"ZFITTER and LHC physics", Talk held at Parallel Session on "EW and QCD Physics" at
6th Annual Workshop of the Helmholtz Alliance "Physics at the Terascale",
35 December 2012, DESY, Hamburg, Germany,
AnnualTerascaleAlliance2012; p.23 of slides had to be changed,
[.pdf]

"Progress in tensor reduction of 1loop Feynman integrals", Talk held at
HP2: High Precision for Hard Processes, 47 September 2012, Max Planck Institute for Physics, Munich, Germany,
HP2
[.pdf]

"New results for algebraic, oneloop Tensor reduction of Feynman integrals", Talk held at
5th Helmholtz International Summer School  Workshop Dubna International Advanced School of Theoretical Physics  DIAS TH, Calculations for Modern and Future Colliders, July 23  August 2, 2012, Dubna, Russia,
CALC
[.pdf]

"Simple Feynman diagrams and simple sums", Talk held at
RISC  DESY Workshop on Advanced Summation Techniques and their Applications in Quantum Field Theory
on the occasion of the 5th year jubilee of the RISCDESY cooperation,
May 0708, 2012, RISC Institute, Castle of Hagenberg, Linz, Austria,
RISCDESY12
[.pdf]

"ZFITTER  20 years after", Talk held at "Loops and Legs in Quantum Field Theory", 1520 April 2012, Wernigerode, Germany, LL2012
[.pdf]

"New results on tensor reduction",
Talk held at regular meeting of SFB/TR9, 20 March 2012, Karlsruhe, Germany
[.pdf]

"ZFITTER in the Era of the LHC and a Linear Collider  or  The Quest for Precision",
Talk held at 3rd LCFORUM meeting, 79 February 2012, DESY, Hamburg, Germany
[.pdf]
2011

"Tensor integrals  New solutions to old problems",
Talk held at German Japanese Workshop on "Modern Trends in Quantum Chromodynamics", 35 October 2011, DESY, Zeuthen, Germany
[.pdf]

"New results for algebraic NLO Tensor reduction of Feynman integrals",
Talk held at
RADCOR, 2630 September 2011, Radisson Resort Temple Bay, Mamallapuram, India
[.pdf]

"New results for algebraic NLO Tensor reduction of Feynman integrals",
Talk at
ACAT, Sep 04 ? Sep 09, 2011, Brunel Univ., London, England
[.pdf]

"New results for algebraic NLO Tensor reduction of Feynman integrals",
Talk held at Workshop on
QCD at the LHC, Aug 21 ? Aug 25, 2011, St. Andrews, Scotland
[.pdf]

"Feynman Integrals and MellinBarnes representations",
Talk held at
"Computer Algebra and Particle Physics", The
DESY CAPP School, 21 March ? 25 March 2011, Zeuthen, Germany
[.pdf]
2010

"Bhabha scattering  Status of Theory Predictions",
Research Workshop of the Israel Science Foundation
High precision measurements of luminosity at future linear colliders and polarization of lepton beams
3  5 October 2010, School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
[.pdf]

"Algebraic tensor Feynman integral reduction",
Corfu Summer Institute, Aug 29 ? Sep 5, 2010, Corfu, Greece
[.pdf]

"Feynman Integrals  MellinBarnes representations  Sums",
Two lectures given at HumboldtUniversität zu Berlin, June 2010
[.pdf]

"Need of precision tools for ILC electroweak physics",
1st Meeting of the Linear Collider Forum (LCFORUM) of the Helmholtz Alliance for Physics at the Tera Scale
Monday 14 June 2010, DESY, Hamburg, Germany
[.pdf]

"Some variations of the reduction of oneloop Feynman tensor integrals",
ACAT, February 2010, Jaipur, India,
[.pdf]
2009

"A recursive reduction of tensor Feynman integrals", talk held at
Radcor 2009,
"9th International Symposium on Radiative Corrections  Application of Quantum Field Theory to Phenomenology", Ascona, Switzerland, October, 2009.
[.pdf]

"Evaluation of Feynman diagrams with MellinBarnes representations",
lecture given at
CALC 2009,
"Helmholtz International SchoolWorkshop on Calculations for Modern and Future Colliders", July 2009, JINR, Dubna, Russia.
[.pdf]

"Bhabha Scattering Theory State of the Art",
talk held at
FCAL collaboration meeting, June 2009, Zeuthen, Germany.
[.pdf]

"Feynman Integrals, MellinBarnes representations, Sums",
lecture given at
CAPP 2009, March/April 2009, Zeuthen, Germany.
[.pdf]

"Evaluation of Feynman Integrals: Advanced Methods",
three lectures given at
RECAPP 2009,
February 2009, Allahabad, India.
[.pdf]
2008

Seminar talk at Edinburgh University, 10 December 2008 on "NNLO contributions to Bhabha scattering"
[.pdf]

ACAT, November 2008, Erice, Italy,
[.pdf]

RadioMontecarLow Workshop, 4th Meeting of the Working Group on Radiative Corrections and Monte Carlo Generators for Low Energies, October 2008, IHEP, Beijing, China
[.pdf]

RadioMontecarLow Workshop, 3rd Meeting of Working Group on Radiative Corrections and Generators for Low Energy Hadronic Cross Section and Luminosity, April 2008, INFN, Frascati, Italy
[.pdf]
Talks before 2008: More Talks
Ph.D Students:

J. Ussovitsch, at HumboldtUniversität zu Berlin, starting November 2014. Cosupervisor: Prof. P. Uwer

I. Dubovyk, at Universität Hamburg, starting October 2014. Cosupervisor: Prof. S. Moch

Dr. V. Yundin,
Ph.D. Thesis
(HumboldtUniversität zu Berlin 2012):
"Massive loop corrections for collider physics".
Cosupervisor: Prof. J. Plefka

Dr. A. Lorca,
Ph.D. Thesis (Universität Bielefeld 2005):
" Calculation and automation of oneloop corrections to 2 to 2 fermion processes".
Cosupervisor: Prof. J. Fleischer
 Dr. M. Jack,
Ph.D. Thesis (HumboldtUniversität zu Berlin 2000):
"Semianalytical calculation of QED radiative corrections to e+e > f(bar)f with special emphasis on kinematical cuts to the final state".
Cosupervisor: Prof. M. MüllerPreussker
 Dr. J. Biebel, Ph.D.
Thesis (HumboldtUniversität zu Berlin 2001):
"Predictions for the search for anomalous couplings of gauge bosons and leptons in e+e scattering".
Cosupervisor: Prof. D.Lüst
 Dr. D. Lehner,
Ph.D. Thesis(HumboldtUniversität zu Berlin 1995)
" Initial state radiative corrections to Z0 pair production in e+e annihilation: The Semianalytical approach".
Cosupervisor: Prof. M. MüllerPreussker
Diploma Students:

F. Haas, Diploma thesis (Universität Potsdam 2008): "Application of MellinBarnes representations to the evaluation of radiative loop diagrams in Bhabha scattering". Cosupervisor: Prof. M. Wilkens

A. Krüger, Diploma thesis (HumboldtUniversität zu Berlin 1998):
"Vorhersagen für Effekte schwerer neutraler Eichbosonen am
epBeschleuniger HERA". Cosupervisor: Prof. D. Ebert
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
flavornondiagonal Zboson decays in the Standard Model (with massive,
mixing neutrinos or top quarks in the loop).
Some Fortran programs:
I do not distribute software using this platform.
In some cases you may find the programs of interest in the program repository of "Computer Physics Communications". Or you may contact me
[or coauthors] directly, you are welcome!
 ZFITTER  A Program for the SemiAnalytic 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 http://zfitter.education. See:
The ZFITTER homepage (25 June 2014),
DOI:10.3204/zfitter.education
Since 2012, there is no institutional ZFITTER support. In case of need, please contact spokesperson@zfitter.education.
The last released version is ZFITTER v.6.43.
Numerically, it is identical to ZFITTER v.6.42, distributed via the software deposit of "Computer Physics Communications".
The actual version is ZFITTER v.6.44beta.
For an overview see the article "The ZFITTER Project", in Physics of Particles and Nuclei, 2014, Vol. 45, No. 3, pp. 529549. DOI:
10.1134/S1063779614030022. © Pleiades Publishing, Ltd., 2014
Further information:
Gfitter01: previous code version
(DESY, Bereich High Energy Physics, 25 June 2013)
Fall ZFITTER/Gfitter  Stellungnahme DESY Direktorium zum Fall ZFITTER/GFitter (Helmut Dosch,
Christian Scherf, 22 March 2014)
 topfit  A Program for the SemiAnalytic Calculation
of Predictions for the Process e+e > t bart (+ photon)
Authors: J. Fleischer, A. Leike, T. Riemann, A. Werthenbach
preprint
DESY 02204, March 2003
ePrint Archive: hepph/0302259
Click
here for the DESY, Zeuthen topfit homepage
 GENTLE/4fan  A Program for the SemiAnalytic 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) 161187
preprint
DESY 96233, December 1996
ePrint Archive: hepph/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
 Predictions for Anomalous tau+ tau gamma Production at LEP 1
Authors: Jochen Biebel and Tord Riemann
Published in Z. Phys. C76 (1997) 5358
preprint
DESY 96212, October 1996, 13pp.
ePrint Archive: hepph/9610437
Click here for the program:
anotau.f
 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) 128184, hepph/9511434
DESY 95185
Source code
Additional applications are possible with v.1.11; see:
DESY 96189 (spin physics)
DESY 96213 (tagged photons)
New beta version of the
source code
 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 94125 [hepph/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/cern.ch/user/g/gruenew/public/smatasy/smata6_10.fortran
smatasy5_02.f
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.
Guest homepage of Prof. Jochem Fleischer at DESY: JF
Back to the DESY, Zeuthen Theory Group home page
Disclaimer
Tord Riemann,
Last modified:
Di 20. Jan 16:58:06 CET 2015