P. Stefański
Lawrence Berkeley National Laboratory
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by P. Stefański.
European Physical Journal C | 1994
T. Alber; H. Appelshäuser; J. Bächler; J. Bartke; H. Bialkowska; M. A. Bloomer; R. Bock; W.J. Braithwaite; D. Brinkmann; R. Brockmann; P. Buncic; P. Chan; S.I. Chase; J. G. Cramer; P.B. Cramer; I. Derado; V. Eckardt; J. Eschke; C. Favuzzi; D. Ferenc; B. Fleischmann; P. Foka; M. Fuchs; M. Gaździcki; E. Gladysz; J. Gunther; John William Harris; M. Hoffmann; P. Jacobs; S. Kabana
AbstractMultiplicities and spectra of strange particles (
Nuclear Physics | 1995
M. Gaździcki; T. Alber; H. Appelshäuser; J. Bächler; J. Bartke; H. Bialkowska; M. A. Bloomer; R. Bock; W.J. Braithwaite; D. Brinkmann; R. Brockmann; P. Buncic; P. Chan; J. G. Cramer; P.B. Cramer; I. Derado; V. Eckardt; J. Eschke; C. Favuzzi; D. Ferenc; B. Fleischmann; P. Foka; M. Fuchs; E. Gladysz; J. Gunther; John William Harris; M. Hoffmann; P. Jacobs; S. Kabana; K. Kadija
Nuclear Physics | 1992
P. Seyboth; J. Seyerlein; R. Brockmann; M. Hoffmann; E. Gladysz; B. Fleischmann; F. Pühlhofer; G. Paić; P. Stefański; Y. Lee; O. Hansen; Peter Martin Jacobs; N. Schmitz; D. Röhrich; J. Cramer; M. Lahanas; M. A. Bloomer; R. Renfordt; P. Spinelli; J. Eschke; M. Kowalski; K. Runge; G. Vassiliadis; P. Buncic; E. E. Schmidt; M. J. LeVine; J. Bartke; A. M. Poskanzer; S. Tonse; John William Harris
\Lambda ,\bar \Lambda ,K_S^0 ,K^ +
European Physical Journal C | 1995
T. Alber; J. Bächler; J. Bartke; H. Bialkowska; M. A. Bloomer; R. Bock; W.J. Braithwaite; D. Brinkmann; R. Brockmann; P. Buncic; P. Chan; S.I. Chase; P.B. Cramer; J. G. Cramer; I. Derado; V. Eckardt; J. Eschke; C. Favuzzi; D. Ferenc; B. Fleischmann; P. Foka; P. Freund; M. Fuchs; M. Gaździcki; E. Gladysz; John William Harris; M. Hoffmann; Peter Martin Jacobs; S. Kabana; K. Kadija
Nuclear Physics | 1992
D. Ferenc; J. Baechler; J. Bartke; H. Bialkowska; M. A. Bloomer; R. Rock; R. Brockmann; P. Buncic; S.I. Chase; J. G. Cramer; I. Derado; V. Eckardt; J. Eschke; C. Favuzzi; B. Fleischmann; P. Foka; M. Fuchs; M. Gazdzicki; E. Gladysz; John William Harris; W. Heck; M. Hoffmann; Peter Martin Jacobs; K. Kadija; S. Kabana; A. Karabarbounis; R. Keidel; J. Kosiec; M. Kowalski; A. Kühmichel
andK− produced in central32S+S,32S+Ag and32S+Au collisions at 200 GeV per nucleon are presented and compared with data on strange particle production in protonnucleus and nucleon-nucleon interactions. It is shown that strangeness production in32S+Ag collisions is enhanced by a factor of two, similar to that found previously in central32S+S collisions.
European Physical Journal C | 1993
J. Bächler; J. Bartke; H. Bialkowska; R. Bock; R. Brockmann; P. Buncic; S.I. Chase; I. Derado; V. Eckardt; J. Eschke; D. Ferenc; B. Fleischmann; M. Fuchs; M. Gaździcki; H.J. Gebauer; E. Gladysz; John William Harris; W. Heck; M. Hoffmann; S. Kabana; K. Kadija; R. Keidel; J. Kosiec; M. Kowalski; A. Kühmichel; M. Lahanas; Y. Lee; M. Le Vine; A. LjubicicJr.; S. Margetis
Abstract Recent results on hadron production in central nucleus-nucleus collisions obtained by the experiment NA35 at the CERN SPS are reviewed. The first preliminary results on central Pb+Pb collisions obtained by the NA49 experiment, the successor of NA35, are also discussed. Their impact on our understanding of the properties of strongly interacting matter at different stages of the collision is underlined.
European Physical Journal C | 1994
J. Bächler; J. Bartke; H. Bialkowska; R. Bock; D. Brinkmann; R. Brockmann; P. Buncic; S. I. Chase; I. Derado; V. Eckardt; J. Eschke; D. Ferenc; B. Fleischmann; P. Foka; M. Fuchs; M. Gaździcki; E. Gladysz; John William Harris; W. Heck; M. Hoffmann; P. Jacobs; S. Kabana; K. Kadija; R. Keidel; J. Kosiec; M. Kowalski; A. Kühmichel; M. Lahanas; J.Y. Lee; A. LjubicicJr.
Abstract Enhanced strange particle production, nonstatistical multiplicity fluctuations and two-pion Bose-Einstein correlations were measured in O, S-nucleus reactions at 60 and 200 GeV/nucleon. The results indicate significant collective effects in high-energy nucleus-nucleus collisions.
Nuclear Physics | 1992
J. Baechler; J. Bartke; H. Bialkowska; M. Bloomer; R. Bock; R. Brockmann; P. Buncic; S.I. Chase; J. G. Cramer; I. Derado; V. Eckardt; J. Eschke; C. Favuzzi; D. Ferenc; B. Fleischmann; P. Foka; M. Fuchs; M. Gaździcki; E. Gladysz; O. Hansen; John William Harris; W. Heck; M. Hoffmann; P. Jacobs; S. Kabana; K. Kadija; A. Karabarbounis; R. Keidel; J. Kosiec; M. Kowalski
Results of a pion interferometry analysis are presented for the reactions S+C, S+S, S+Cu, S+Ag, S+Au and O+Au at 200 GeV per nucleon. Correlation functions were measured for pairs of negative pions in narrow windows of transverse momentum and rapidity, as a function of the three components of the momentum difference vector in cylindrical coordinates. The measured two-pion correlation functions suggest a space-time evolution of the system which proceeds in the following way for central nucleus-nucleus collisions. After interpenetration of the incident nuclei, the pion source expands in a boost invariant way along the collision axis. Estimates for the proper time interval between the onset of expansion and pion decoupling, as well as for the duration of pion emission are ∼ 4 fm/c and <2 fm/c, respectively. ThekT dependence observed forRS is consistent with the effect of resonance decays, alone or combined with slow transverse expansion. A linear dependence of the decoupling volume on the multiplicity is observed and indicates pion decoupling at a constant particle density. Presently available model predictions are briefly discussed
European Physical Journal A | 1992
J. Bächler; J. Bartke; H. Bialkowska; R. Bock; R. Brockmann; P. Buncic; S. I. Chase; I. Derado; V. Eckardt; J. Eschke; D. Ferenc; B. Fleischmann; M. Fuchs; M. Gazdzicki; H.J. Gebauer; E. Gladysz; John William Harris; W. Heck; M. Hoffmann; S. Kabana; K. Kadija; R. Keidel; J. Kosiec; M. Kowalski; A. Kühmichel; M. Lahanas; Y. Lee; M. J. LeVine; A. LjubicicJr.; S. Margetis
Abstract Pion interferometry is the unique tool to study the space-time evolution of the systems created in the ultrarelativistic nuclear collisions. Five different data sets have been analyzed in terms of cylindrical coordinates, and all yield consistent results. We conclude that the system expands longitudinally, the decoupling proper time is ∼5 fm/c, the duration of particle emission is very short
Physical Review Letters | 1994
J. Baechler; J. Bartke; H. Bialkowska; R. Bock; R. Brockmann; P. Buncic; S.I. Chase; I. Derado; V. Eckardt; J. Eschke; D. Ferenc; B. Fleischmann; P. Foka; M. Fuchs; M. Gazdzicki; E. Gladysz; John William Harris; W. Heck; M. Hoffmann; P. Jacobs; S. Kabana; K. Kadija; R. Keidel; J. Kosiec; M. Kowalski; A. Kuehmichel; M. Lahanas; J.Y. Lee; A. Ljubicic; S. Margetis
Multiplicity distributions of negatively charged particles have been studied in restricted phase space intervals for central S+S, O+Au and S+Au collisions at 200 GeV/nucleon. It is shown that multiplicity distributions are well described by a negative binomial form irrespectively of the size and dimensionality of phase space domain. A clan structure analysis reveals interesting similarities between complex nuclear collisions and a simple partonic shower. The lognormal distribution agrees reasonably well with the multiplicity data in large domains, but fails in the case of small intervals. No universal scaling function was found to describe the shape of multiplicity distributions in phase space intervals of varying size.
