The webpage has been migrated in March 2013 from http://www.ifh.de/~riemann to
http://hugoriemann.de.
Private homepage of
Dr. Tord Riemann
Researching at DESY, Zeuthen, 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)
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 05/2005 spokesperson of the ZFITTER project, see also http://zfitter.com
Since 2012, there is, presumably, no ZFITTER project at DESY.
The actual version is ZFITTER v.6.44beta. Available on request.
In case of interest, send me a private email.
 Since 2003 Project Leader in SFB/TRR 9 of DFG, project B1:
"Precision calculations of massive particle production processes"
Past:
 08/200907/2011 Spokesperson of Theory Group, DESY, Zeuthen
 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
 4/20044/2008 Spokesperson of Theory Group, DESY, Zeuthen
 9/19938/1995 Spokesperson of Theory Group, DESY, Zeuthen
Lehre:
Seit 2006 Lehraufträge an der Universität Potsdam
Vorlesungen und Übungen am Institut für Physik und Astronomie der Universität Potsdam  "Das Standardmodell der
Elementarteilchen  theoretische Einführung"
SS 2010: go
here (in German)
SS 2011, 2012, 2013: Vorlesung wird bei Bedarf angeboten.
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
Coorganizing the biannual series

Conference "Loops and Legs in Quantum Field Theory"
LL 2012 in Wernigerode
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

See also the homepages on
Ambre,
Bhabha Scattering,
DIANA_aITALC,
ZFITTER  since 2012, presumably, no DESY project,
HECTOR
Publications:
spires search
eprint archive
Conference Talks and Lectures at Advanced Schools:
Talk by J. Gluza, Zeuthen, Germany, 23 June 2011:
"The Bhabha Project"
2013

"Contraction of 1loop 5point tensor Feynman integrals",
Talk at
ACAT, May 16  21, 2013, IHEP, CAS, Beijing, China
[.pdf]

"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:

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:
Because there happened misunderstandings about the conditions of use of opensource 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 coauthors] directly.
 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 XXXXXXX.com.
 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