- Website of the ZFITTER project

[1] http://zfitter.education was legally a private one. In scientific communications, institutional webpage are preferred.

The ZFITTER webpage before zfitter.education exists yet and contains some documentations,

[2] http://zfitter.com. This private webpage was the homepage of ZFITTER from 20 June 2013 till March 2014.

ZFITTER contact:

Any of the main ZFITTER authors A. Akhundov, A. Arbuzov, D. Bardin (spokesperson from 1985 till 2005), P. Christova, L. Kalinovskaya, A. Olshevsky, S. Riemann, T. Riemann (spokesperson since 2005).

Preferrably, please contact the spokesperson,

[3] spokesperson@zfitter.education

Left photograph, from left to right: Lida Kalinovskaya, Pena Christova, Dima Bardin, Tord Riemann, Sabine Riemann, Andrej Arbuzov (Photograph made on occasion of 5th Helmholtz International Summer School "Calculations for Modern and Future Colliders", July 23 - August 2, 2012, Dubna, Russia, CALC 2012.)

Middle and right photographs: Sasha Olshevsky and Arif Akhundov. © tordriemann@googlemail.com 2012, © JINR, Dubna, 2012, © A. Akhundov (priv.)

[4] http://cpc.cs.qub.ac.uk/licence/licence.html.

The ZFITTER project exists since about 1985. Its development was driven mainly at JINR, Dubna, Russia, in cooperation with other institutions in Azerbaidshan, Bulgaria, Germany, Russia.

The project comprizes about 2.2 millions of Euros (equivalent to 155 millions of Rubles or 2.4 millions of dollars), if only counting the investment of about 30 FTE's (Full Time Equivalents) on a regular basis of highly qualified scientists with present-day salary in e.g. Germany. About half of that is due to project management, and half is due to creation of the software. One half of the second, in turn, is due to the creation of the Standard Model library of ZFITTER: 7.5 FTE, 550,000 Euro. The same amount is due to the treatment of QED corrections in ZFITTER.

The estimates are very conservative. They are mentioned here in order to evidence the importance of a proper use of ZFITTER.

The excellence and uniqueness of the ZFITTER project are highly esteemed in the scientific community.

The ZFITTER team was honored for

The honored ZFITTER authors:

Professor D. Bardin (JINR, Dubna), Professor M. Bilenky (then JINR, Dubna), Professor P. Christova (Univ. Shoumen, Bulgaria), Professor M. Jack (Florida A&M University, Tallahassee, Florida), Professor L. Kalinovskaya (JINR, Dubna), Professor A. Olshevsky (JINR, Dubna), Dr. S. Riemann (DESY, Zeuthen), Dr. T. Riemann (DESY, Zeuthen).

ZFITTER is being used for an uncountable amount of experimental and phenomenological studies. The masses of the top quark and of the (assumed) Higgs boson were predicted with ZFITTER, from virtual quantum corrections to lower-energy observables, prior to their discoveries in 1995 and 2012.

The perhaps most important applications for the elementary particle physics community may be found at the webpage of the LEP electroweak working group

[5] LEPEWWG.

The prediction of the Higgs mass, assuming the Standard Model being valid, derived from radiative corrections to precision observables measured at LEP and other facilities, is visualized in the popular Blue Band Plot of the LEPEWWG [figure from [5]]:

See also

[6] lepewwg.web.cern.ch/LEPEWWG/plots/winter12/w12_blueband.pdf

The precision electroweak measurements yield a mass of the Standard-Model Higgs boson which is lower than about 152 GeV (one-sided 95 percent confidence level upper limit derived from ΔΧ² = 2.7 for the blue band, thus including both the experimental and the theoretical uncertainty).

The Blue Band Plot of the LEPEWWG is made with the ZFITTER package, in its latest version of 2008 with ZFITTER v. 6.43.

It is cited in the

[7]

[8] http://zfitter.education.

The following three ZFITTER packages are available from the

[9] CPC Catalogue identifier ABRL:

http://cpc.cs.qub.ac.uk/summaries/ABRL_v1_0.html.

Authors of the Fortran package DIZET: Dubna-Zeuthen EWRC group (see also the list of authors in [10])

Authors of the program description: D.Yu. Bardin, P.Ch. Christova, M.S. Bilenky, T. Riemann, M. Sachwitz, H. Vogt

[10] CPC Catalogue identifier ADMJ:

http://cpc.cs.qub.ac.uk/summaries/ADMJ_v1_0.html.

Authors of the Fortran package ZFITTER v6.21 (quote from the program description): D. Bardin, M. Bilenky (1987-1994), A. Chizhov (1987-1991), P. Christova (since 1997), O. Fedorenko (1990), M. Jack (1997 [-2000]), L. Kalinovskaya (since 1997), A. Olshevsky, S. Riemann, T. Riemann, M. Sachwitz (1987-1991), A. Sazonov (1987-1991), Yu. Sedykh (1989-1991), I. Sheer (1991-1992), L. Vertogradov (1990).

Extra list of authors for the Standard Model library of ZFITTER (quote from the program description): A. Akhundov (1985-1989), D. Bardin, M. Bilenky (1987-1994), P. Christova, L. Kalinovskaya (since 1997), S. Riemann, T. Riemann, M. Sachwitz (1987-1991), H. Vogt (1989).

The author of the subpackage BHANG v4.67 of ZFITTER v6.21 for Bhabha scattering is M. Bilenky (quote from the program description).

Authors of the program description: D. Bardin, M. Bilenky, P. Christova, M. Jack, L. Kalinovskaya, A. Olchevski, S. Riemann, T. Riemann.

[11] CPC Catalogue identifier ADMJ:

http://cpc.cs.qub.ac.uk/summaries/ADMJ_v2_0.html.

Authors of the original Fortran package ZFITTER (quote from the program description): D. Bardin, P. Christova, M. Jack, L. Kalinovskaya, A. Olchevski, S. Riemann, T. Riemann. Further authors of ZFITTER v6.42: A. Akhundov, A. Arbuzov, plus the authors mentioned for ZFITTER v6.21 and DIZET and BHANG, see above.

Authors of the program description: A.B. Arbuzov, M. Awramik, M. Czakon, A. Freitas, M.W. Grünewald, K. Mönig, S. Riemann, T. Riemann.

Several authors of the 2005 program description were not considered as authors of the ZFITTER software: M. Awramik, M. Czakon, A. Freitas, M.W. Grünewald, K. Mönig; although A. Freitas and, to a lesser extent, M. Awramik, made notable contributions to the code version 6.42.

The authors of the program description instead constituted the ZFITTER support group. From 2005 till March 1, 2011, the date of beginning of the Gfitter incident (see below).

The main ZFITTER authors A. Akhundov, A. Arbuzov, D. Bardin, P. Christova, L. Kalinovskaya, A. Olchevski, S. Riemann, T. Riemann are until now the present responsibles of the project.

Quote from the program description in Comput. Phys. Commun. 174(2006)728,

DIZET_v6.45.tgz

Note added 10 November 2020:

The authors of DIZET v6.45 are: A. Arbuzov, J. Gluza, L. Kalinovskaya, S. Riemann, T. Riemann, V. Yermolchyk

The package was not yet officially released, but may downloaded here under the conditions which were also relevant for the ZFITTER package. Including respecting the CPC program library's copyright statement.

A description of the specifics of the version is under development. See also the README.txt in the package DIZET_v6.45.tgz.

- a selection

[12] D. Bardin and N. Shumeiko,

Nucl. Phys. B127 (1977) 242. doi:10.1016/0550-3213(77)90213-9.

[13] D. Bardin and O. Fedorenko,

Dubna preprint JINR-P2-11413 (1978), unpublished, scan: JINR-P2-11413.pdf.

[14] D. Bardin and O. Fedorenko,

Dubna preprint JINR-P2-11414 (1978), unpublished, scan: JINR-P2-11414.pdf.

[15] D. Bardin, P. Khristova, and O. Fedorenko,

Nucl. Phys. B175 (1980) 435. doi:10.1016/0550-3213(80)90021-8.

[16] D.Y. Bardin, P.K. Khristova, and O. Fedorenko,

Nucl. Phys. B197 (1982) 1. doi:10.1016/0550-3213(82)90152-3.

[17] G. Mann and T. Riemann,

Annalen Phys. 40 (1984) 334, Zeuthen preprint PHE 83-03, scan: KEK.

[18] A. Akhundov, D. Bardin, and T. Riemann,

Phys. Lett. B166 (1986) 111. Dubna preprint JINR-E2-85-454, doi:10.1016/0370-2693(86)91166-4.

[19] A. Akhundov, D. Bardin, and T. Riemann,

Nucl. Phys. B276 (1986) 1, doi:10.1016/0550-3213(86)90014-3.

[20] D. Bardin, S. Riemann, and T. Riemann,

Z. Phys. C32 (1986) 121-125, doi:10.1007/BF01441360.

[21] D. Bardin, M. Bilenky, O. Fedorenko, and T. Riemann,

1988, Dubna preprint JINR-E2-88-324, unpublished, scan: KEK.

[22] D.Yu. Bardin, A. Leike, T. Riemann, M. Sachwitz,

Phys. Lett. B206 (1988) 539-542. doi:10.1016/0370-2693(88)91625-5.

[23] D. Bardin, M. Bilenky, G. Mitselmakher, T. Riemann, and M. Sachwitz,

Z. Phys. C44 (1989) 493, doi:10.1007/BF01415565 (PHE 88-03 ,KEK scanned paper)

[23a] D. Bardin and A. Chizhov,

[24] D.Yu. Bardin, M.S. Bilenky, A. Chizhov, A. Sazonov, Yu. Sedykh, T. Riemann, M. Sachwitz,

Phys. Lett. B229 (1989) 405

[25] M.S. Bilenky, A.A. Sazonov,

JINR-E2-89-792, submitted to: Phys. Lett.B

[26] D. Bardin, M. Bilenky, A. Chizhov, A. Sazonov, O. Fedorenko, T. Riemann, and M. Sachwitz,

Nucl. Phys. B351 (1991) 1-48 (PHE 89-19, March 1989). (E-print hep-ph/9801208)

[27] D.Y. Bardin, M.S. Bilenky, P. Christova, T. Riemann, M. Sachwitz, and H. Vogt,

Comput. Phys. Commun. 59 (1990) 303-312. (PHE 89-09, June 1989), KEK scanned document:)

[27a] D. Bardin, W. Hollik, and T. Riemann,

[28] D. Bardin, M. Bilenky, A. Sazonov, Y. Sedykh, T. Riemann, and M. Sachwitz,

Phys. Lett. B255 (1991) 290-296 (PHE 90-17, October 1990) . (E-print hep-ph/9801209)

[29] D. Bardin, M. Bilenky, A. Chizhov, O. Fedorenko, S. Ganguli, A. Gurtu, M. Lokajicek, G. Mitselmakher, A. Olshevsky, J. Ridky, S. Riemann, T. Riemann, M. Sachwitz, A. Sazonov, A. Schaile, Y. Sedykh, I. Sheer, and L. Vertogradov,

CERN-TH-6443-92, E-print arXiv:hep-ph/9412201, 1992.

[30] D. Bardin, M. Bilenky, P. Christova, M. Jack, L. Kalinovskaya, A. Olchevski, S. Riemann, and T. Riemann,

Comput. Phys. Commun. 133 (2001) 229-395. (E-print hep-ph/9908433)

[31] D. Bardin, L. Kalinovskaya, S. Riemann, T. Riemann [may be: et al.],

Subsection 4.4 of

[32] A. Arbuzov,

hep-ph/9907500.

[33] A. Arbuzov,

Phys. Lett. B470 (1999) 252-258, doi:10.1016/S0370-2693(99)01290-3, [hep-ph/9908361].

[34] P. Christova, M. Jack, and T. Riemann,

Phys. Lett. B456 (1999) 264-269, [hep-ph/9902408].

[35] D.Y. Bardin, L. Kalinovskaya, and G. Nanava,

hep-ph/0012080.

[36] D.Y. Bardin, P. Christova, L. Kalinovskaya, and G. Passarino,

Eur. Phys. J. C22 (2001) 99-104, [hep-ph/0102233].

[37] M. Awramik, M. Czakon, A. Freitas, and G. Weiglein,

Phys. Rev. Lett. 93 (2004) 201805, [hep-ph/0407317].

[38] A. Arbuzov, M. Awramik, M. Czakon, A. Freitas, M. Grünewald, K. Mönig, S. Riemann, and T. Riemann,

Comput.Phys.Commun. 174 (2006) 728-758. (E-print hep-ph/0507146)

[39] D.Y. Bardin and G. Passarino,

monography, Oxford University Press, 1999. International series of monographs on physics, 104

[40] G. Alekseev, D. Bardin, M. S. Bilenky, I. Boyko, G. Chelkov, L. Kalinovskaya, B. Khomenko, N. Khovansky, O. Kuznetsov, Z. Krumshtein, V. Malyshev, M. Nikolenko, A. Olshevsky, V. Pozdnyakov, N. Pukhaeva, A. Sadovsky, Y. Sedykh, A. Sisakian, O. Smirnova, L. Tkachev, I. Tyapkin, L. Vertogradov, A. Vodopianov, N. Zimin, A. Zinchenko, and A. Zinchenko,

Part. Nucl. Lett. 98 (2001) 5-22.

[41] D.Y. Bardin,

a historical overwiev, J. Phys. G29 (2003) 75-82, [hep-ph/0101295].

[42] T. Riemann,

a short historical overwiev, Riemann's talk at the conference Loops and Legs 2012 . The contribution to the proceedings of the conference

LL2012_036.pdf was retracted.

A comprehensive historical overwiev is:

[43] A. Akhundov, A. Arbuzov, S. Riemann and T. Riemann,

Physics of Particles and Nuclei (May 2014), Volume 45, Issue 3, pp 529-549,

http://link.springer.com/article/10.1134/S1063779614030022, arXiv:1302.1395

The authors of the article got the

Latest news:

The representative of University of Hamburg makes the following summarizing statement in March 2016:

In English:

The document, as well as the Report of the Ombudskollegium of UHH (dated in November 2015), is available on justified request.

The proposed opportunity of a healing contact of J. Haller and T. Riemann was not perceived by J. Haller.

We will give notice on the consequences of Gfitter's activities after the final statement by UHH.