Marek's Picture
Marek A. Zielinski

Senior Scientist
Experimental High Energy Physics
Fermilab PK177
P.O. Box 500
Batavia, Ill 60510 
(630) 840-2373
Rochester FAX (585) 273-3237 ;  Secretary (585) 275-5306
(630) 840-8886
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Biographical Sketch

Marek Zielinski was born in Cracow, the ancient capital of Poland. He had lived there until 1987 when he moved to the United States. Currently, he  lives with his wife and son in Naperville, IL, near Fermilab. He obtained his education in Poland receiving MS in Physics in 1974 and PhD in 1978 from the Jagellonian University - the oldest Polish university, founded in1364.

Dr. Zielinski joined the Rochester group for the first time in 1981 to participate in the research program at Fermilab. During the following decade, he worked, alternatively, at Fermilab with the Rochester group and at the Jagellonian University. His research related to results from Fermilab experiment E272 on Primakoff and diffractive production of mesons constituted the foundation for his Habilitation Degree, received from the Institute for Nuclear Research in Cracow in 1987. At the Jagellonian University, he held teaching positions (as Assistant, Senior Assistant, and Assistant Professor) and did research in theory and phenomenology of particle physics. He was also an editor for Acta Physica Polonica  from 1978 to 1990.

While at Fermilab, Dr. Zielinski has been employed by the University of Rochester first as  Research Associate and then as Senior Research Associate. He has worked on  various aspects of experiments E272, E706, E672, E781, and, currently, DZero under the tutelage of Professors T. Ferbel and P. Slattery. Dr. Zielinski has made presentations at numerous conferences and has  published  more than 100 articles in refereed journals. He also has been active in organizing workshops and conference sessions related to his research interests. During his career as a scientist, Dr. Zielinski has worked with more than  50 graduate students. He considers the educational aspects of his work to be among the most satisfying and rewarding experiences. In recent years has has served as head of the Calorimeter Simulation and Calorimeter Software Algorithms Groups of the  Dzero experiment at  Fermilab (1997--2000), as co-organizer of "Multi-Hadron Final States" session at International Conference on Deep Inelastic Scattering, DIS 2002, as  co-convener, Run II QCD Physics Group, Dzero Fermilab  (2000-2003), as  co-Chair, Calorimeter Task Force, Dzero Fermilab (2002-2003) and as Co-Leader, Run II Top Physics Monte Carlo Subgroup of Dzero  at Fermilab (2002-currrently).


Dr. Zielinski's  research interests are in High Energy Physics. He started his activities in the field as a theorist. His Master's and PhD theses were concerned with theory  and  phenomenology of particle production in high energy interactions, particularly within the frameworks of the quark model and perturbative QCD. His involvement with the experimental program began at Fermilab experiment E272 with work on meson excitation  in the nuclear Coulomb field  and diffractive interactions of pions  with nuclei. He was primarily responsible for Partial Wave Analysis of coherent three-pion production on nuclei and for the first determination of the radiative  width of the a1 meson. He continued this line of research as a member of Fermilab experiment E781,  leading to the new determination of the radiative width of the a2 meson.

The next experiment, E706, Dr. Zielinski participated in, was aimed at testing QCD predictions for large momentum-transfer production of direct photons and mesons. He was in charge of software for the reconstruction of electromagnetic signals from the E706 lead and liquid-argon calorimeter. He also led various aspects of data analysis and Monte Carlo simulations. Results from E706 indicated the need for improvements in the theoretical calculations and received significant attention from theorists and phenomenologists, as well as from the heavy-ion community at RHIC. In addition, Dr. Zielinski took part in the research program of experiment E672 on hadronic production of states containing charm and bottom quarks; E672 and E706 shared Meson West Spectrometer and operated in tandem.

Subsequently, Dr. Zielinski focused on the Fermilab collider experiment DZero. In the period leading to the start-up of Run 2, he was responsible for the simulation of the calorimeter detectors and headed  the calorimeter-software group. Later, he was appointed a co-chair of Calorimeter Task Force charged with investigation of a wide range of issues in the performance of calorimeter hardware and software. Modifications of jet reconstruction, implementation of better energy-weighting factors, corrections for non-linearity of response, and refinements of simulation software and offline  zero-suppression, performed under his leadership, provided a greatly improved  understanding of calorimeter signals. Within QCD Group, he also guided detailed studies of  jet properties, essential not only for physics analyses but also for commissioning of the calorimeters.

As a co-convener of QCD Physics Group, Dr. Zielinski helped to establish its initial physics priorities and goals. He was directly involved in the analyses of inclusive jet and di-jet cross sections - the flagship measurements of QCD Group. With significantly more data expected to accumulate in Run 2, the results on the inclusive jet cross section will provide powerful constraints on global fits to parton distributions within the nucleon. Distribution in di-jet mass is of particular interest in searching for quark substructure or any hypothetical heavy resonances, a long-sought possibility for physics beyond the standard model. Although his current involvement in the QCD analyses is diminishing in favor of work on the physics of the top quark, Dr. Zielinski already helped to establish the procedures needed for carrying out this research program in Run 2.

Currently, Dr. Zielinski serves as a co-leader of the Monte-Carlo subgroup of Top Physics Group. He is in charge of generating signal and background Monte-Carlo samples for the top-quark measurements and maintaining a variety of software tools. His participation in Fermilab Workshops on Matrix Element Techniques and Monte Carlo Tuning, and experience with QCD and calorimeter issues, serve well to complement this work.

Dr. Zielinski's future research interests are in the top-quark physics and searching for novel physics aspects related to electroweak symmetry breaking, at DZero and at the LHC collider.

Selected Publications

V. M. Abazov et al.,
``Direct search for charged Higgs bosons in decays of top quarks,''
Phys. Rev. Lett. 88, 151803 (2002).

L.Apanasevich et al.,
``kT effects in direct photon production,''
Phys. Rev. D 59, 074007 (1999).

L. Apanasevich et al.,
``Evidence for parton kT effects in high-pT particle production,''
Phys. Rev. Lett. 81, 2642 (1998).

M. Zielinski,
``Radiative decays of light mesons,''
Acta Phys. Polon. B18, 455 (1987).

M. Zielinski et al.,
``Evidence for the electromagnetic production of the A1,''
Phys. Rev. Lett. 52, 1195 (1984).

For a complete Vitae see postscript or pdf.

For a SLAC/SPIRES List of Zielinski's publications click (here for full list) 
click (here for citation summary format )
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This page was last updated Fri, Mar 7, 2003; 3:13:17 PM 
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