Author: "S Hegyi" - Searchworks@Jio Institute Digital Library Search Results

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92 results on '"S Hegyi"'

1. Three-dimensional two-pion source image from Pb+Pb collisions at sNN=17.3 GeV: New constraints for source breakup dynamics

Author: Michal Kreps, V. Trubnikov, I. K. Yoo, Christof Roland, D. Flierl, R. Lacey, J. Bartke, O. Chvala, M. Vassiliou, Miroslav Pikna, J. G. Cramer, C. Höhne, Dezso Varga, P. Seyboth, B. Lungwitz, J. Gál, S. Kniege, Marek Gaździcki, Z. Fodor, S. Hegyi, M. van Leeuwen, P. Szymanski, Gunther Roland, D. Panayotov, St Mrówczyński, Kreso Kadija, Christoph Blume, Andrzej Rybicki, D. Barna, Andras Laszlo, H. Ströbele, Rainer Arno Ernst Renfordt, B. Baatar, V. I. Kolesnikov, Scott Pratt, T. R. Schuster, Adam Ryszard Kisiel, Maciej Rybczyński, T. Antičić, V. Nicolic, Alexander Malakhov, E. Skrzypczak, D. Vranic, G. Pálla, Zbigniew Wlodarczyk, D. J. Prindle, Jozsef Molnar, Latchezar Betev, Ferenc Sikler, J. Pluta, Andreas Petridis, A. Wojtaszek, V. Eckardt, I. Szentpetery, Marek Kowalski, A. Karev, M. Słodkowski, J. Sziklai, F. Pühlhofer, J. Bracinik, Panagiotis Christakoglou, E. Gladysz, Leander Litov, P. Dinkelaker, Branislav Sitar, Gabor Istvan Veres, V. Cerny, C. Alt, M. Botje, Pawel Danielewicz, R. Korus, N. Schmitz, W. Peryt, Helena Bialkowska, Panagiota Foka, T. Susa, James Alexander, M. Szuba, Apostolos Panagiotou, G. L. Melkumov, P. Csato, P. Chung, Predrag Buncic, R. Stock, V. Genchev, G. Stefanek, Bożena Boimska, Peter Levai, A. Sandoval, M. Mateev, Gyorgy Vesztergombi, M. K. Mitrovski, Katarzyna Grebieszkow, V. Friese, and M. Makariev
Subjects: Physics, Source function, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Dynamics (mechanics), Breakup, 01 natural sciences, Nuclear physics, Transverse plane, Pion, Flow (mathematics), 0103 physical sciences, Proper time, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Beam (structure)
Abstract: Source imaging methodology is used to provide a three-dimensional two-pion source function for mid-rapidity pion pairs with p T 70 MeV / c in central (0–7%) Pb + Pb collisions at s NN = 17.3 GeV . Prominent non-Gaussian tails are observed in the pion pair transverse momentum (outward) and in the beam (longitudinal) directions. Model calculations reproduce them with the assumption of Bjorken longitudinal boost invariance and transverse flow blast-wave dynamics; they also yield a proper time for breakup and emission duration for the pion source.
Published: 2010

2. Bose–Einstein correlations of charged kaons in central Pb+Pb collisions at Ebeam=158 GeV per nucleon

Author: S.V Afanasiev, T Anticic, B Baatar, D Barna, J Bartke, R.A Barton, M Behler, L Betev, H Białkowska, A Billmeier, C Blume, C.O Blyth, B Boimska, M Botje, J Bracinik, R Bramm, R Brun, P Bunčić, V Cerny, O Chvala, J.G Cramer, P Csató, P Dinkelaker, V Eckardt, P Filip, Z Fodor, P Foka, P Freund, V Friese, J Gál, M Gaździcki, G Georgopoulos, E Gładysz, S Hegyi, C Höhne, G Igo, P.G Jones, K Kadija, A Karev, V.I Kolesnikov, T Kollegger, M Kowalski, I Kraus, M Kreps, M van Leeuwen, R Lednicky, P Lévai, A.I Malakhov, S Margetis, C Markert, B.W Mayes, G.L Melkumov, C Meurer, A Mischke, M Mitrovski, J Molnár, J.M Nelson, G Pálla, A.D Panagiotou, K Perl, A Petridis, M Pikna, L Pinsky, F Pühlhofer, J.G Reid, R Renfordt, W Retyk, C Roland, G Roland, A Rybicki, T Sammer, A Sandoval, H Sann, N Schmitz, P Seyboth, F Siklér, B Sitar, E Skrzypczak, G.T.A Squier, R Stock, H Ströbele, T Susa, I Szentpétery, J Sziklai, T.A Trainor, D Varga, M Vassiliou, G.I Veres, G Vesztergombi, D Vranić, A Wetzler, C Whitten, I.K Yoo, J Zaranek, and J Zimányi
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Transverse plane, Pion, Large Hadron Collider, Nuclear Theory, High Energy Physics::Experiment, Bose–Einstein correlations, Nuclear Experiment, Beam (structure), NA49 experiment
Abstract: Bose-Einstein correlations of charged kaons were measured near mid-rapidity in central Pb+Pb collisions at 158 A$\cdot$GeV by the NA49 experiment at the CERN SPS. Source radii were extracted using the Yano-Koonin-Podgoretsky and Bertsch-Pratt parameterizations. The results are compared to published pion data. The measured $m_\perp$ dependence for kaons and pions is consistent with collective transverse expansion of the source and a freeze-out time of about 9.5 $fm$.
Published: 2003

3. Energy dependence of Λ and production at CERN-SPS energies

Author: A. Mischke, S.V. Afanasiev, T. Anticic, B. Baatar, D. Barna, J. Bartke, R.A. Barton, M. Behler, L. Betev, H. Białkowska, A. Billmeier, C. Blume, C.O. Blyth, B. Boimska, M. Botje, J. Bracinik, R. Bramm, R. Brun, P. Buncˇić, V. Cerny, O. Chvala, J.G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, P. Filip, H.G. Fischer, Z. Fodor, P. Foka, P. Freund, V. Friese, J. Gál, M. Gaździcki, G. Georgopoulos, E. Gładysz, S. Hegyi, C. Höhne, G. Igo, P.G. Jones, K. Kadija, A. Karev, V.I. Kolesnikov, T. Kollegger, M. Kowalski, I. Kraus, M. Kreps, M. van Leeuwen, P. Lévai, A.I. Malakhov, S. Margetis, C. Markert, B.W. Mayes, G.L. Melkumov, C. Meurer, M. Mitrovski, J. Molnár, J.M. Nelson, G. Pálla, A.D. Panagiotou, K. Perl, A. Petridis, M. Pikna, L. Pinsky, F. Pühlhofer, J.G. Reid, R. Renfordt, W. Retyk, C. Roland, G. Roland, A. Rybicki, T. Sammer, A. Sandoval, H. Sann, N. Schmitz, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, G.T.A. Squier, R. Stock, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, T.A. Trainor, D. Varga, M. Vassiliou, G.I. Veres, G. Vesztergombi, D. Vranić, S. Wenig, A. Wetzler, C. Whitten, I.K. Yoo, J. Zaranek, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Meson, High Energy Physics::Phenomenology, Hyperon, Lambda, High Energy Physics::Experiment, Production (computer science), Rapidity, Nuclear Experiment, Energy (signal processing), Bar (unit)
Abstract: Rapidity distributions for $\Lambda$ and $\bar{\Lambda}$ hyperons in central Pb-Pb collisions at 40, 80 and 158 A$\cdot$GeV and for ${\rm K}_{s}^{0}$ mesons at 158 A$\cdot$GeV are presented. The lambda multiplicities are studied as a function of collision energy together with AGS and RHIC measurements and compared to model predictions. A different energy dependence of the $\Lambda/\pi$ and $\bar{\Lambda}/\pi$ is observed. The $\bar{\Lambda}/\Lambda$ ratio shows a steep increase with collision energy. Evidence for a $\bar{\Lambda}/\bar{\rm p}$ ratio greater than 1 is found at 40 A$\cdot$GeV.
Published: 2003

4. Ξ− and production in central Pb+Pb collisions at 158 GeV/c per nucleon

Author: S.V Afanasiev, T Anticic, D Barna, J Bartke, R.A Barton, L Betev, H Białkowska, A Billmeier, C Blume, C.O Blyth, B Boimska, M Botje, J Bracinik, R Bramm, R Brun, P Bunčić, V Cerny, J.G Cramer, P Csató, P Dinkelaker, V Eckardt, P Filip, H.G Fischer, Z Fodor, P Foka, P Freund, V Friese, J Gál, M Gaździcki, G Georgopoulos, E Gładysz, S Hegyi, C Höhne, G Igo, P.G Jones, K Kadija, A Karev, V.I Kolesnikov, T Kollegger, M Kowalski, I Kraus, M Kreps, M van Leeuwen, P Lévai, A.I Malakhov, S Margetis, C Markert, B.W Mayes, G.L Melkumov, A Mischke, J Molnár, J.M Nelson, G Pálla, A.D Panagiotou, K Perl, A Petridis, M Pikna, L Pinsky, F Pühlhofer, J.G Reid, R Renfordt, W Retyk, C Roland, G Roland, A Rybicki, T Sammer, A Sandoval, H Sann, N Schmitz, P Seyboth, F Siklér, B Sitar, E Skrzypczak, G.T.A Squier, R Stock, H Ströbele, T Susa, I Szentpétery, J Sziklai, T.A Trainor, D Varga, M Vassiliou, G.I Veres, G Vesztergombi, D Vranić, S Wenig, A Wetzler, C Whitten, I.K Yoo, J Zaranek, and J Zimányi
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Cascade, Phase space, Hyperon, Inverse, Transverse mass, Rapidity, Nucleon, Spectral line
Abstract: Results of the production of Xi and Xi-bar hyperons in central Pb+Pb interactions at 158 GeV/c per nucleon are presented. This analysis utilises a global reconstruction procedure, which allows a measurement of 4pi integrated yields to be made for the first time. Inverse slope paramters, which are determined from an exponential fit to the transverse mass spectra, are shown. Central rapidity densities are found to be 1.49 +- 0.08 and 0.33 +- 0.04 per event per unit of rapidity for Xi and Xi-bar respectively. Yields integrated to full phase space are 4.12 +- 0.02 and 0.77 +- 0.04 for Xi and Xi-bar. The ratio of Xi-bar/Xi at mid-rapidity is 0.22 +- 0.03.
Published: 2002

5. CHEMISTRY EXPERIMENTS -FOR COMPARATIVE ANALYSES FOR DEMONSTRATING ENVIRONMENTAL DIFFERENCES ON VENUS, EARTH, MARS, AND TITAN -BUILT ON EDUCATIONAL SPACE PROBES HUNVEYOR AND HUSAR

Author: Bérczi, A Róka, Z Nyíri, T Varga, A Fabriczy, Cs Peták, Gy Hudoba, S Hegyi, A Lang, I Gyollai, and A Gucsik
Published: 2014
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6. Event-by-Event Fluctuations of the Kaon-to-Pion Ratio in CentralPb+PbCollisions at 158 GeV per Nucleon

Author: Gunther Roland, Miroslav Pikna, G. Georgopoulos, P. Seyboth, A. M. Poskanzer, Andreas Petridis, A. Billmeier, J. Sziklai, Christina Markert, G. Odyniec, R. Janik, S. Afanasiev, F. Eckhardt, H. Sann, C. O. Blyth, A. Wetzler, E. Schäfer, L. Betev, Dezso Varga, G. Igo, R. A. Barton, Daniel Ferenc, J. Gál, Siegfried Wenig, C. Höhne, J. Bartke, Helena Bialkowska, J. Zimányi, G. E. Cooper, C. A. Whitten, Fuqiang Wang, Andre Mischke, I. Szentpetery, H. Ströbele, J. Bächler, P. Foka, M. Vassiliou, Christof Roland, M. Botje, Alexander Malakhov, N. Schmitz, Dieter Røhrich, F. Pühlhofer, V. Hlinka, Tome Anticic, B. W. Mayes, J. W. Harris, Lincoln D. Carr, M. Ivanov, I. K. Yoo, Gyorgy Vesztergombi, F. P. Brady, Jozsef Molnar, G.T.A. Squier, J. M. Nelson, Thomas A. Trainor, R. Snellings, T. Ullrich, K. Kadija, J. G. Cramer, D. Barna, Rainer Arno Ernst Renfordt, Peter Strmen, Marek Gaździcki, V. Eckardt, H. G. Ritter, P. Filip, Tatjana Susa, V. I. Kolesnikov, P. Jacobs, T. A. Yates, Peter Levai, D. Vranic, Lee Stuart Barnby, P. Freund, B. Lasiuk, Z. Fodor, J. Bracinik, S. Voloshin, M. Toy, E. Skrzypczak, Ferenc Sikler, A. Sandoval, H. G. Fischer, V. Friese, D. D. Weerasundara, N. Xu, R. Bramm, Gabor Istvan Veres, Predrag Buncic, Lawrence Pinsky, B. Boimska, W. Retyk, D. Cebra, S. Margetis, S. Trentalange, Apostolos Panagiotou, M. van Leeuwen, J. Ftacnik, G. L. Melkumov, D. J. Prindle, Jeffrey G. Reid, Marek Kowalski, T. Sammer, E. Gladysz, S. Hegyi, Andrzej Rybicki, Imrich Szarka, Rene Brun, P. Csato, R. Stock, Gergely Palla, Branislav Sitar, C. Blume, Peter Graham Jones, and Thorsten Sven Kollegger
Subjects: Physics, Quantum chromodynamics, Particle physics, Meson, Nuclear Theory, Hadron, General Physics and Astronomy, Fermion, Nuclear physics, Baryon, Pion, High Energy Physics::Experiment, Nuclear Experiment, Nucleon, Event (particle physics)
Abstract: We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio of charged kaons to charged pions is determined for individual central Pb+Pb collisions. After accounting for the fluctuations due to detector resolution and finite number statistics we derive an upper limit on genuine nonstatistical fluctuations, which could be related to a first- or second-order QCD phase transition. Such fluctuations are shown to be very small.
Published: 2001

7. Correlations and fluctuations in Pb+Pb collisons

Author: V. Eckardt, Z. Fodor, G. Odyniec, H. G. Fischer, Siegfried Wenig, R. A. Barton, Juraj Bracinik, Alexander Malakhov, P. Seyboth, Jozsef Molnar, Branislav Sitar, Gyorgy Vesztergombi, G.T.A. Squier, Imrich Szarka, C. O. Blyth, Lincoln D. Carr, Christoph Blume, D. D. Weerasundara, A. M. Poskanzer, J. G. Cramer, Panagiota Foka, Andrzej Rybicki, T. Susa, P. Freund, L. S. Pinsky, Marek Gaździcki, S. Margetis, H. Sann, J. Grebieszkow, F. Pühlhofer, Jeffrey G. Reid, H. G. Ritter, K. Kadija, C. Höhne, Bożena Boimska, Rene Brun, Peter Levai, J. Ftacnik, F. P. Brady, J. Zimányi, D. Cebra, J. Sziklai, Apostolos Panagiotou, I. K. Yoo, N. Schmitz, Dieter Røhrich, Peter Graham Jones, G. L. Melkumov, S. Voloshin, M. Toy, J. M. Nelson, G.E. Cooper, J. Bartke, J. Bächler, M. Vassiliou, G. Pálla, Peter Strmen, L. Betev, D. J. Prindle, C. P. A. Roland, E. Schäfer, V. Hlinka, A. Yu. Semenov, Marek Kowalski, T. Ullrich, T. Sammer, H. Ströbele, E. Gladysz, B. W. Mayes, A. Billmeier, S. Trentalange, P. Csato, Peter Martin Jacobs, R. Stock, Predrag Buncic, R. Janik, Andreas Petridis, D. Barna, D. Varga, F. Eckhardt, V. I. Kolesnikov, A. Sandoval, T. A. Yates, Gabor Istvan Veres, E. Skrzypczak, S. Hegyi, G. Igo, M. Oldenburg, Helena Bialkowska, Rainer Arno Ernst Renfordt, W. Retyk, R.J.M. Snellings, D. Vranic, N. Xu, Gunther Roland, B. Lasiuk, Christina Markert, C. A. Whitten, Ferenc Sikler, R. Ganz, M. V. Ivanov, V. Friese, Miroslav Pikna, I. Szentpetery, Lee Stuart Barnby, R. Lednicky, Thomas A. Trainor, J. Gál, Daniel Ferenc, Fuqiang Wang, and J. W. Harris
Subjects: Nuclear physics, Physics, Nuclear reaction, Nuclear and High Energy Physics, Strange matter, Deuterium, Nuclear Experiment, Anisotropy, Deconfinement, Event (particle physics), Atomic and Molecular Physics, and Optics, Charged particle, NA49 experiment
Abstract: Results on two-particle correlations, deuteron production, event anisotropy and event-by-event fluctuations of 〈 p T 〉 and K/π were obtained by the NA49 experiment in Pb+Pb collisions at 158 A·GeV beam energy. The interpretation of the measurements is discussed in light of the search for deconfinement.
Published: 2001

8. Production of φ-mesons in p+p, p+Pb and central Pb+Pb collisions at GeV

Author: D. J. Prindle, Marek Kowalski, T. Sammer, E. Gladysz, J. Gál, H. G. Fischer, F. Pühlhofer, Lawrence Pinsky, Christoph Blume, L. Betev, Andrzej Rybicki, J. M. Nelson, Gyorgy Vesztergombi, Daniel Ferenc, Fuqiang Wang, Tatjana Susa, R. Ganz, Rene Brun, Norbert Schmitz, P. Seyboth, J. W. Harris, Kreso Kadija, B. W. Mayes, V. Eckardt, Miroslav Pikna, C. O. Blyth, S. Voloshin, S. Afanasiev, N. Xu, P. Freund, Lee Stuart Barnby, F. Eckhardt, Rainer Arno Ernst Renfordt, Peter Martin Jacobs, Peter Graham Jones, Marian Ivanov, H. G. Ritter, Predrag Buncic, J. G. Cramer, Lincoln D. Carr, D. Cebra, Peter Levai, S. Trentalange, Apostolos Panagiotou, Dieter Røhrich, G. Odyniec, Marek Gaździcki, G. Igo, M. Oldenburg, Andreas Petridis, R. Janik, V. I. Kolesnikov, G. L. Melkumov, C. P. A. Roland, T. A. Yates, E. Skrzypczak, G. Pálla, J. Grebieszkow, Dezso Varga, Jozsef Molnar, G.T.A. Squier, D. Vranic, S. Margetis, T. Ullrich, D. Barna, R. A. Barton, A. Sandoval, E. Schäfer, A. Yu. Semenov, A. Billmeier, S. Hegyi, G.E. Cooper, I. Szentpetery, Ferenc Sikler, R.J.M. Snellings, Peter Strmen, A. M. Poskanzer, F. P. Brady, Helena Bialkowska, Andre Mischke, Branislav Sitar, D. D. Weerasundara, B. Boimska, J. Sziklai, J. Ftacnik, Panagiota Foka, Christina Markert, P. Csato, R. Stock, V. Friese, C. Höhne, C. A. Whitten, Thomas A. Trainor, Juraj Bracinik, Gunther Roland, Imrich Szarka, M. Toy, Alexander Malakhov, J. Bächler, M. Vassiliou, Jeffrey G. Reid, V. Hlinka, Tome Anticic, J. Zimányi, Gabor Istvan Veres, Siegfried Wenig, W. Retyk, B. Lasiuk, Z. Fodor, H. Sann, I. K. Yoo, J. Bartke, and H. Ströbele
Subjects: Physics, Nuclear and High Energy Physics, Minimum bias, Meson, Analytical chemistry, Electron beam processing, Yield ratio, Atomic physics, Multiplicity (chemistry), Phi meson
Abstract: Yields and phase space distributions of φ -mesons emitted from p+p (minimum bias trigger), p+Pb (at various centralities) and central Pb+Pb collisions are reported ( E beam =158 A GeV). The decay φ →K + K − was used for identification. The φ / π ratio is found to increase by a factor of 3.0±0.7 from inelastic p+p to central Pb+Pb. Significant enhancement in this ratio is also observed in subclasses of p+p events (characterized by high charged-particle multiplicity) as well as in the forward hemisphere of central p+Pb collisions. In Pb+Pb no shift or significant broadening of the φ -peak is seen.
Published: 2000

9. Deuteron production in central Pb+Pb collisions at 158A GeV

Author: P. Freund, G. Roland, Gyorgy Vesztergombi, R. Snellings, E. Schäfer, H. G. Ritter, Siegfried Wenig, S. Afanasiev, F. Eckhardt, Rainer Arno Ernst Renfordt, D. Cebra, S. Trentalange, Apostolos Panagiotou, Andrzej Rybicki, Andreas Petridis, L. Betev, P. Jacobs, Peter Levai, J. G. Cramer, J. Zimányi, Dezso Varga, G. Igo, M. Oldenburg, J. W. Harris, C. O. Blyth, Ferenc Sikler, Dieter Røhrich, I. Szentpetery, G. L. Melkumov, Rene Brun, P. Strmen, F. P. Brady, Daniel Ferenc, Fuqiang Wang, M. Vassiliou, Andre Mischke, C. Roland, Marek Gaździcki, V. Hlinka, R. A. Barton, C. Blume, A. Semenov, Tome Anticic, N. Xu, Zoltan Fodor, D. J. Prindle, Jozsef Molnar, P. Seyboth, V. Friese, G.T.A. Squier, Norbert Schmitz, V. Eckardt, D. D. Weerasundara, T. Ullrich, J. Bächler, Marek Kowalski, S. Margetis, T. Sammer, B. Boimska, Lee Stuart Barnby, E. Gladysz, Kreso Kadija, I. K. Yoo, R. Ganz, S. Hegyi, J. Sziklai, B. Sitar, S. Voloshin, A. M. Poskanzer, Peter Graham Jones, B. W. Mayes, H. G. Fischer, P. Csato, A. Sandoval, M. Pikna, R. Janik, A. Billmeier, J. Bracinik, Lawrence Pinsky, Christina Markert, G. Odyniec, E. Skrzypczak, R. Stock, J. Grebieszkow, F. Pühlhofer, M. Ivanov, J. M. Nelson, V. I. Kolesnikov, Lincoln D. Carr, T. A. Yates, D. Vranic, D. Barna, Helena Bialkowska, Gergely Palla, J. Ftáčnik, Thomas A. Trainor, I. Szarka, C. Höhne, G. E. Cooper, C. A. Whitten, Jeffrey G. Reid, J. Gál, P. Bunčić, H. Ströbele, P. Foka, C. Struck, H. Sann, M. Toy, J. Bartke, Alexander Malakhov, Gabor Istvan Veres, W. Retyk, B. Lasiuk, and Tatjana Susa
Subjects: Coalescence (physics), Physics, Nuclear and High Energy Physics, Large Hadron Collider, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Inverse, Exponential function, Nuclear physics, Pion, Deuterium, Electron beam processing, Transverse mass, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment
Abstract: Experimental results on deuteron emission from central Pb+Pb collisions ( E beam =158A GeV, fixed target), obtained by NA49 at the CERN SPS accelerator, are presented. The transverse mass m t distribution was measured near mid-rapidity (2.0 y m t − m 0 c 2 (0 p t c ) for the 4% most central collisions. An exponential fit gives an inverse slope T d =(450±30) MeV and a yield dN d / dy =0.34±0.03. The coalescence factor B 2 ( m t = m 0 )=(3.5±1.0)·10 −4 GeV 2 and its m t -dependence are determined and discussed in terms of a model that includes the collective expansion of the source created in a collision. The derived Gaussian size parameter R G of the emission volume is consistent with earlier HBT results on the source of pion emission.
Published: 2000

10. Beyond KNO: multiplicative cascades and novel multiplicity scaling laws

Author: S. Hegyi
Subjects: Particle system, Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Cascade, Multiplicative function, Multiplicity (mathematics), Parton, Multiplicative cascade, Scaling, Mathematical physics
Abstract: The collapse of multiplicity distributions P n onto a universal scaling curve arises when P n is expressed as a function of the standardized multiplicity ( n − c )/ λ with c and λ being location and scale parameters governed by leading particle effects and the growth of average multiplicity. It is demonstrated that self-similar multiplicative cascade processes such as QCD parton branching naturally lead to a novel type of scaling behavior of P n which manifests itself in Mellin space through a location change controlled by the degree of multifractality and a scale change governed by the depth of the cascade. Applying the new scaling rule it is shown how to restore data collapsing behavior of P n measured in hh collisions at ISR and SPS energies.
Published: 1999

11. Log-KNO scaling: a new empirical regularity at very high energies?

Author: S. Hegyi
Subjects: Quantum chromodynamics, Physics, Coupling constant, Nuclear and High Energy Physics, Scaling law, Logarithm, Multiplicative function, Multiplicity (mathematics), Statistical physics, Collision, Scaling
Abstract: The running of the QCD coupling constant as well as multiplicative cascades of varying depth are found to give rise to data collapsing behavior of the multiplicity distributions after suitable location and scale change in the logarithm of multiplicity. Hence the onset of a log-KNO scaling law is predicted in high-energy collision processes. It is shown that the available multiplicity data in e+e− and p p collisions can be collapsed onto the same scaling curve.
Published: 1999

12. Correlation studies in quark jets using combinants

Author: S Hegyi
Subjects: Quark, Physics, Nuclear and High Energy Physics, symbols.namesake, Particle physics, Superposition principle, symbols, Multiplicity (mathematics), Rapidity, Poisson distribution, Cluster analysis
Abstract: A brief summary of the basic properties of combinants is provided. Their behavior is analysed using the Opal multiplicity data for light quark jets in restricted rapidity bins. For | Δy |≤1 the combinants do not exclude clustering effects with Poisson superposition. For | Δy |≤2 this pattern of correlations is ruled out by the sign-changing oscillations of combinants, as well as other models which predict oscillations alternating in sign. The future experimental possibilities concerning combinants are discussed.
Published: 1999

13. Baryon Stopping and Charged Particle Distributions in CentralPb+PbCollisions at 158 GeV per Nucleon

Author: C. Roland, Rainer Arno Ernst Renfordt, S. Margetis, A. Piper, N. Xu, Andrzej Rybicki, Jeffrey G. Reid, H. Ströbele, C. A. Whitten, Rene Brun, C. Bormann, P. Foka, R. Brockmann, R. Ganz, H. Hümmler, Ferenc Sikler, Lee Stuart Barnby, H. L. Caines, Norbert Schmitz, D. D. Weerasundara, Peter Graham Jones, Andreas Petridis, J. Sziklai, T. Ullrich, V. Friese, D. Schmischke, B. Boimska, E. Schäfer, Helena Bialkowska, F. Eckhardt, J. Gál, A. Yu. Semenov, J. Bächler, S. Hegyi, G. L. Melkumov, C. O. Blyth, W. Retyk, S. Schönfelder, Gyorgy Vesztergombi, M. Vassiliou, W. Geist, M. Fuchs, G. Roland, Siegfried Wenig, L. Wood, R. Zybert, A. Sandoval, R.J. Porter, Thomas A. Trainor, Alexander Malakhov, H. Appelshäuser, H. G. Fischer, G. Igo, M. Oldenburg, J. Dunn, D. Irmscher, H. Sann, S. Poziombka, D. Cebra, J. Günther, S. Trentalange, M. I. Ferguson, A. M. Poskanzer, Apostolos Panagiotou, S. J. Bailey, T. Wienold, X. Z. Zhu, A. Billmeier, Peter Levai, J. Zimányi, Christina Markert, G. Odyniec, I. Huang, A. Mock, D. J. Prindle, Torsten Henkel, J. Grebieszkow, B. Lasiuk, P. Freund, Marek Kowalski, H. Rudolph, E. Gladysz, P. Seyboth, J. Bartke, J. W. Harris, H. G. Ritter, V. I. Kolesnikov, P. Jacobs, V. Eckardt, T. A. Yates, F. P. Brady, D. Vranic, R. A. Barton, Fuqiang Wang, L. A. Hill, G. E. Cooper, M. Toy, D. Flierl, J. G. Cramer, E. Skrzypczak, I. Szentpetery, Marek Gaździcki, Zoltan Fodor, F. Pühlhofer, J. M. Nelson, Dieter Røhrich, Jozsef Molnar, R. Bock, G.T.A. Squier, K. Kadija, Predrag Buncic, F. Gabler, Gergely Palla, P. Csato, and R. Stock
Subjects: Physics, Nuclear reaction, Proton, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Super Proton Synchrotron, Nuclear physics, Baryon, Rapidity, Atomic physics, Nuclear Experiment, Nucleon
Abstract: Net proton and negative hadron spectra for central Pb+Pb collisions at 158thinspthinspGeV per nucleon at the CERN Super Proton Synchrotron were measured and compared to spectra from lighter systems. Net baryon distributions were derived from those of net protons. Stopping (rapidity shift with respect to the beam) and mean transverse momentum {l_angle}p{sub T}{r_angle} of net baryons increase with system size. The rapidity density of negative hadrons scales with the number of participant nucleons for nuclear collisions, whereas their {l_angle}p{sub T}{r_angle} is independent of system size. The {l_angle}p{sub T}{r_angle} dependence upon particle mass and system size is consistent with larger transverse flow velocity at midrapidity for Pb+Pb compared to S+S central collisions. {copyright} {ital 1999} {ital The American Physical Society}
Published: 1999

14. Ξ and production in 158 GeV/nucleon Pb+Pb collisions

Author: H. Appelshäuser, J. Bächler, S.J. Bailey, D. Barna, L.S. Barnby, J. Bartke, R.A. Barton, H. Białkowska, A. Billmeier, C.O. Blyth, R. Bock, C. Bormann, F.P. Brady, R. Brockmann, R. Brun, P. Bunčić, H.L. Caines, L.D. Carr, D. Cebra, G.E. Cooper, J.G. Cramer, M. Cristinziani, P. Csato, J. Dunn, V. Eckardt, F. Eckhardt, M.I. Ferguson, H.G. Fischer, D. Flierl, Z. Fodor, P. Foka, P. Freund, V. Friese, M. Fuchs, F. Gabler, R. Ganz, W. Geist, J. Gal, M. Gaździcki, E. Gładysz, J. Grebieszkow, J. Günther, J.W. Harris, S. Hegyi, T. Henkel, L.A. Hill, H. Hümmler, G. Igo, D. Irmscher, P. Jacobs, P.G. Jones, K. Kadija, V.I. Kolesnikov, A. Konashenok, M. Kowalski, B. Lasiuk, P. Lévai, F. Liu, A.I. Malakhov, S. Margetis, C. Markert, G.L. Melkumov, A. Mock, J. Molnár, J.M. Nelson, M. Oldenburg, G. Odyniec, G. Palla, A.D. Panagiotou, A. Petridis, A. Piper, R.J. Porter, A.M. Poskanzer, D.J. Prindle, F. Pühlhofer, W. Rauch, J.G. Reid, R. Renfordt, W. Retyk, H.G. Ritter, D. Röhrich, C. Roland, G. Roland, H. Rudolph, A. Rybicki, A. Sandoval, H. Sann, A.Yu. Semenov, E. Schäfer, D. Schmischke, N. Schmitz, S. Schönfelder, P. Seyboth, J. Seyerlein, F. Sikler, E. Skrzypczak, R. Snellings, G.T.A. Squier, R. Stock, H. Ströbele, Chr. Struck, T. Susa, I. Szentpetery, J. Sziklai, M. Toy, T.A. Trainor, S. Trentalange, T. Ullrich, M. Vassiliou, G. Veres, G. Vesztergombi, D. Vranić, F. Wang, D.D. Weerasundara, S. Wenig, C. Whitten, T. Wienold, L. Wood, N. Xu, T.A. Yates, J. Zimanyi, X.-Z. Zhu, and R. Zybert
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Yield (chemistry), Hadron, Hyperon, Transverse mass, Rapidity, Nucleon, Spectral line, Bar (unit)
Abstract: We report measurements of Xi and Xi-bar hyperon absolute yields as a function of rapidity in 158 GeV/c Pb+Pb collisions. At midrapidity, dN/dy = 2.29 +/- 0.12 for Xi, and 0.52 +/- 0.05 for Xi-bar, leading to the ratio of Xi-bar/Xi = 0.23 +/- 0.03. Inverse slope parameters fitted to the measured transverse mass spectra are of the order of 300 MeV near mid-rapidity. The estimated total yield of Xi particles in Pb+Pb central interactions amounts to 7.4 +/- 1.0 per collision. Comparison to Xi production in properly scaled p+p reactions at the same energy reveals a dramatic enhancement (about one order of magnitude) of Xi production in Pb+Pb central collisions over elementary hadron interactions.
Published: 1998

15. F emission in central Pb+Pb collisions at 158 GeV/u

Author: J. Gál, F. Pühlhofer, J. Dunn, Christina Markert, J. M. Nelson, Siegfried Wenig, Andreas Petridis, P. Csato, R. Stock, C. Bormann, Fuqiang Wang, D. D. Weerasundara, R. J. Porter, F. P. Brady, R. A. Barton, D. Schmischke, H. L. Caines, S. Margetis, S. Trentalange, D. J. Prindle, Peter Martin Jacobs, C. A. Whitten, R. Brockmann, V. Friese, E. Schäfer, A. Yu. Semenov, Predrag Buncic, Lee Stuart Barnby, Christof Roland, A. Piper, Marek Kowalski, Rainer Arno Ernst Renfordt, I. Huang, L. Wood, C. O. Blyth, Panagiota Foka, P. Szymanski, T. Ullrich, L. A. Hill, Helena Bialkowska, Jeffrey G. Reid, A. Mock, H. G. Fischer, J. Seyerlein, T. Wienold, F. Gabler, S. Schönfelder, S. Poziombka, Gyorgy Vesztergombi, F. Eckhardt, B. Lasiuk, A. M. Poskanzer, E. Gladysz, E. Skrzypczak, Torsten Henkel, X.-Z. Zhu, D. Flierl, H. Appelshäuser, Ferenc Sikler, N. Schmitz, Gunther Roland, Dieter Røhrich, Falk Pühlhofer, R. Zybert, G. Odyniec, G. Igo, M. Oldenburg, J. Zimányi, Z. Fodor, P. Freund, Jozsef Molnar, G.T.A. Squier, H. Hümmler, Thomas A. Trainor, J. Bächler, J. W. Harris, M. Vassiliou, Peter Graham Jones, G.E. Cooper, M. I. Ferguson, J. Sziklai, A. Billmeier, G. Pálla, W. Retyk, P. Seyboth, S. J. Bailey, D. Cebra, J. Günther, Apostolos Panagiotou, G. L. Melkumov, Kreso Kadija, V. Eckardt, Alexander Malakhov, Andrzej Rybicki, Rene Brun, A. Sandoval, S. Hegyi, M. Fuchs, J. G. Cramer, Marek Gaździcki, V. I. Kolesnikov, T. A. Yates, D. Vranic, H. Rudolph, I. Szentpetery, W. Rauch, M. Toy, J. Grebieszkow, H. Sann, J. Bartke, H. Ströbele, R. K. Bock, H. G. Ritter, Peter Levai, and D. Irmscher
Subjects: Nuclear physics, Physics, Nuclear and High Energy Physics, Large Hadron Collider, Yield (chemistry), Strangeness, Square (algebra), NA49 experiment
Abstract: Data on φ -production obtained by the CERN NA49 experiment for central Pb+Pb collisions at 158 GeV/u are presented. Compared with pp interactions the φ -yield shows substantial strangeness enhancement: the φ /π ratio is found to increase by a factor of 2.6 ± 0.6, which is approximately the square of the K/π enhancement.
Published: 1998

16. Spectator Nucleons in Pb+Pb Collisions at 158 A·GeV

Author: P. Csato, Siegfried Wenig, D. Irmscher, J. W. Harris, P. B. Cramer, F. Gabler, B. Lasiuk, J. Dunn, Christina Markert, I. Sakrejda, Panagiota Foka, C. Bormann, J. Gál, A. M. Poskanzer, V. Eckardt, F. Eckhardt, J. G. Cramer, R. A. Barton, Peter Graham Jones, Marek Gaździcki, S. Poziombka, Jozsef Molnar, A. Mock, P. Freund, G. Odyniec, T. Wienold, Torsten Henkel, A. Sandoval, J. Zimányi, G. Igo, Z. Fodor, V. Friese, M. I. Ferguson, Lee Stuart Barnby, X. Z. Zhu, E. Skrzypczak, Gunther Roland, S. Hegyi, Norbert Schmitz, Christof Roland, A. Piper, J. Grebieszkow, M. Toy, H. Hümmler, E. Schäfer, M. Fuchs, A. Yu. Semenov, S. J. Bailey, F. P. Brady, I. Huang, H. Appelshäuser, Andreas Petridis, L. A. Hill, C. O. Blyth, Rainer Arno Ernst Renfordt, M. Vassiliou, Andrzej Rybicki, T. Ullrich, S. Margetis, W. Rauch, L. Wood, Fuqiang Wang, Jeffrey G. Reid, G. L. Melkumov, N. Buncic, Dieter Røhrich, P. Seyboth, W. Retyk, F. Pühlhofer, S. White, J. Seyerlein, H. Sann, J. Sziklai, H. G. Ritter, R. Stock, G.E. Cooper, P. Chan, J. M. Nelson, Peter Levai, Kreso Kadija, I. Szentpetery, D. Flierl, T. A. Yates, Ferenc Sikler, Alexander Malakhov, D. Vranic, D. D. Weerasundara, Thomas A. Trainor, R. Brockmann, J. Bartke, S. Schönfelder, Gyorgy Vesztergombi, D. Schmischke, H. Rudolph, H. G. Fischer, Peter Martin Jacobs, H. Ströbele, Helena Bialkowska, Predrag Buncic, R. K. Bock, R. J. Porter, G. T. A. Squier, D. J. Prindle, G. Pálla, Marek Kowalski, C. A. Whitten, R. Zybert, E. Gladysz, D. Cebra, J. Günther, S. Trentalange, Apostolos Panagiotou, P. Gorodetsky, H. L. Caines, J. Bächler, and V. I. Kolesnikov
Subjects: Physics, Nuclear and High Energy Physics, Range (particle radiation), Particle physics, Large Hadron Collider, Nuclear Theory, Hadron, Nuclear physics, Deuterium, Nuclear fusion, Neutron, Impact parameter, Nuclear Experiment, Nucleon
Abstract: The composition of forward-going projectile spectator matter in fixed-target Pb+Pb collisions at 158 A · GeV at the CERN SPS has been studied as a function of centrality. The data were measured with the NA49 veto calorimeter. We observe that forward-going spectator matter in central collisions consists of 9 neutrons, 7 protons, and half a deuteron on average. At large impact parameters most spectator nucleons are bound in fragments. The relative resolution of the average impact parameter derived from the measurement of spectator neutrons is roughly 19% in the range from zero to half maximum impact parameters.
Published: 1998

17. Directed and elliptic flow in 158 GeV/nucleon Pb + Pb collisions

Author: J. W. Harris, Jozsef Molnar, F. P. Brady, V. Eckardt, K. Kadija, D. Flierl, D. D. Weerasundara, G.T.A. Squier, M. I. Ferguson, A. Sandoval, D. Irmscher, Siegfried Wenig, D. Schmischke, C. O. Blyth, S. Hegyi, M. Fuchs, C. Bormann, R. J. Porter, S. Margetis, H. G. Fischer, Andrzej Rybicki, H. Appelshäuser, R. A. Barton, J. G. Cramer, S. Schönfelder, Gyorgy Vesztergombi, Helena Bialkowska, D. J. Prindle, Dieter Røhrich, Rene Brun, H. G. Ritter, Marek Gaździcki, Christof Roland, A. Piper, T. Wienold, R. Zybert, S. Voloshin, G.E. Cooper, Rainer Arno Ernst Renfordt, E. Skrzypczak, Marek Kowalski, G. Pálla, Peter Levai, M. Toy, Andreas Petridis, I. Huang, L. Wood, Panagiota Foka, E. Gladysz, F. Eckhardt, P. Freund, J. Sziklai, Ferenc Sikler, F. Pühlhofer, G. L. Melkumov, G. Odyniec, J. Grebieszkow, J. Bächler, M. Vassiliou, V. I. Kolesnikov, G. Igo, M. Oldenburg, E. Schäfer, J. M. Nelson, A. Yu. Semenov, R. Brockmann, P. Csato, R. Stock, J. Seyerlein, Norbert Schmitz, Peter Martin Jacobs, T. A. Yates, D. Vranic, Predrag Buncic, Gunther Roland, P. Seyboth, F. Gabler, H. Rudolph, T. Ullrich, I. Szentpetery, Alexander Malakhov, L. A. Hill, D. Cebra, J. Günther, Peter Graham Jones, S. Trentalange, Apostolos Panagiotou, C. A. Whitten, J. Dunn, Christina Markert, V. Friese, Thomas A. Trainor, S. Poziombka, J. Zimányi, A. Mock, Torsten Henkel, B. Lasiuk, Z. Fodor, H. Hümmler, Jeffrey G. Reid, W. Retyk, W. Rauch, H. Sann, J. Bartke, J. Gál, H. Ströbele, R. K. Bock, Fuqiang Wang, A. M. Poskanzer, Lee Stuart Barnby, H. Caines, and S. J. Bailey
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Elliptic flow, Physics::Fluid Dynamics, Nuclear physics, Pion, Flow (mathematics), Transverse momentum, Rapidity, Nuclear Experiment, Nucleon, Beam (structure)
Abstract: The directed and elliptic flow of protons and charged pions has been observed from the semi-central collisions of a 158 GeV/nucleon Pb beam with a Pb target. The rapidity and transverse momentum dependence of the flow has been measured. The directed flow of the pions is opposite to that of the protons at high rapidity but both exhibit negative flow at low p t . The elliptic flow of both is fairly independent of rapidity but rises with p t .
Published: 1998

18. H-function extension of the NBD in the light of experimental data

Author: S. Hegyi
Subjects: Physics, High Energy Physics - Phenomenology, Nuclear and High Energy Physics, Mellin transform, Particle physics, High Energy Physics - Phenomenology (hep-ph), Negative binomial distribution, FOS: Physical sciences, Experimental data, Extension (predicate logic), Function (mathematics), Mathematical physics
Abstract: The recently introduced H-function extension of the Negative Binomial Distribution is investigated. The analytic form of P(n) is rederived by means of the Mellin transform. Applications of the HNBD are provided using experimental data for P(n) in e+e-, e+p, inelastic pp and non-diffractive p-pbar reactions., 8 pages REVTeX, 1 eps figure embedded
Published: 1997

19. Preliminary results on Pb+Pb collisions from the Grid-TOF data analysed in Budapest

Author: S. Schönfelder, Gyorgy Vesztergombi, J. W. Harris, L. A. Hill, G. E. Cooper, M. A. Bloomer, I. Huang, L. Wood, V. Eckardt, X.-Z. Zhu, J. Dunn, J. Bächler, M. Vassiliou, B. Lasiuk, C. Bormann, D. Vranic, I. Derado, K. Runge, I. Szentpetery, A. M. Poskanzer, F. P. Brady, P. Seyboth, P. B. Cramer, Jozsef Molnar, M. I. Ferguson, R. Brockmann, J. G. Cramer, A. Piper, K. Kadija, S. Euler, S. Trentalange, Marek Gaździcki, W. Heck, P. Csato, D. Irmscher, G. Odyniec, H. Appelshäuser, R. Stock, H. G. Fischer, M. Toy, J. Grebieszkow, C. O. Blyth, N. Schmitz, Dieter Røhrich, Thomas A. Trainor, P. Chan, E. Skrzypczak, T. Wienold, Peter Levai, Panagiota Foka, F. Eckhardt, J. Gál, J. Zimányi, H. L. Caines, P. Jacobs, F. Pühlhofer, G. Igo, J. M. Nelson, H. G. Ritter, M. A. Howe, Z. Fodor, A. Petridis, Predrag Buncic, C. A. Whitten, T. Alber, P. Freund, G. Pálla, J. Gunther, E. Schäfer, J. Seyerlein, W. Rauch, H. Ströbele, Helena Bialkowska, H. Sann, R. Zybert, J. Bartke, D. J. Prindle, Marek Kowalski, H. Rudolph, E. Gladysz, F. Bieser, J. Sziklai, J. W. Mitchell, D. Cebra, Apostolos Panagiotou, A. Kühmichel, A. Sandoval, S. Hegyi, M. Fuchs, A. Mock, Siegfried Wenig, S. Margetis, W. Retyk, Ferenc Sikler, Peter Graham Jones, R. K. Bock, and R. Renfordt
Subjects: Condensed Matter::Quantum Gases, Physics, Nuclear and High Energy Physics, Large Hadron Collider, Physics::Instrumentation and Detectors, Nuclear Theory, Detector, Hadron, General Physics and Astronomy, Grid, Tracking (particle physics), Particle identification, Spectral line, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, NA49 experiment
Abstract: The first results from the NA49 experiment, using a large acceptance tracking detector with particle identification, are presented which have been obtained from the recent Pb-ion run at the CERN SPS. Preliminary spectra of kaons and protons identified by the Grid-TOF detector as well as Bose-Einstein correlations are shown.
Published: 1996

20. Hadron yields and hadron spectra from the NA49 experiment

Author: D. D. Weerasundara, C. Bormann, J. Bächler, D. Schmischke, M. Vassiliou, P. Seyboth, D. Irmscher, Rainer Arno Ernst Renfordt, A. Piper, H. G. Fischer, Ferenc Sikler, C. O. Blyth, Siegfried Wenig, J. Sziklai, Kreso Kadija, F. Pühlhofer, G.E. Cooper, H. G. Ritter, Peter Levai, J. Gál, D. Cebra, J. Günther, J. W. Harris, J. M. Nelson, M. Toy, Apostolos Panagiotou, G. L. Melkumov, I. Huang, L. Wood, J. Grebieszkow, S. Schönfelder, V. Eckardt, P. B. Cramer, X.-Z. Zhu, G. Odyniec, J. G. Cramer, Gyorgy Vesztergombi, Andreas Petridis, F. P. Brady, P. Freund, Lee Stuart Barnby, M. Cyprian, Peter Graham Jones, Marek Gaździcki, N. Bunicic, J. W. Mitchell, Christof Roland, A. M. Poskanzer, H. Appelshäuser, Jozsef Molnar, R. Bock, M. I. Ferguson, Helena Bialkowska, S. Margetis, T. Wienold, E. Skrzypczak, S. Poziombka, R. Zybert, S. Trentalange, J. Zimányi, R. Brockmann, V. I. Kolesnikov, T. A. Yates, D. Vranic, D. J. Prindle, H. Rudolph, D. Flierl, Peter Martin Jacobs, Marek Kowalski, I. Szentpetery, Predrag Buncic, S. Euler, E. Gladysz, A. Mock, Z. Fodor, H. Hümmler, G. Pálla, Andrzej Rybicki, E. Schäfer, A. Yu. Semenov, A. Sandoval, J. Seyerlein, H. L. Caines, S. Hegyi, M. Fuchs, W. Retyk, Alexander Malakhov, P. Csato, R. Stock, F. Gabler, B. Lasiuk, I. Derado, Panagiota Foka, O. Dietz, L. A. Hill, Thomas A. Trainor, P. Chan, H. Sann, J. Dunn, Christina Markert, S. Afanasiev, F. Eckhardt, J. Bartke, G. Igo, H. Ströbele, W. Rauch, N. Schmitz, Dieter Røhrich, Gunther Roland, M. A. Howe, C. A. Whitten, and T. Alber
Subjects: Physics, Nuclear physics, S system, Nuclear and High Energy Physics, Particle physics, Nuclear Theory, Hadron, Nuclear Experiment, Nucleon, Central region, NA49 experiment, Spectral line
Abstract: Preliminary inclusive spectra of negative hadrons, net protons and neutral strange particles are presented, measured by the NA49 experiment in central Pb+Pb collisions at 158 GeV per nucleon. Comparison of their yields with those from the lighter S+S system suggests that the yields scale approximately with the number of participating nucleons.
Published: 1996

21. Stopping and collective effects at SPS energies

Author: J. Dunn, Christina Markert, Siegfried Wenig, M. A. Howe, S. Poziombka, Serguei Afanasiev, F. Pühlhofer, J. Zimányi, J. G. Cramer, J. Sziklai, C. A. Whitten, C. O. Blyth, M. I. Ferguson, J. M. Nelson, A. M. Poskanzer, T. Alber, Lee Stuart Barnby, F. P. Brady, W. Rauch, S. Schönfelder, Gyorgy Vesztergombi, Andreas Petridis, D. Prindle, Norbert Schmitz, L. A. Hill, C. Bormann, Helena Bialkowska, G. L. Melkumov, M. Vassiliou, Marek Kowalski, R. Zybert, S. Margetis, Peter Martin Jacobs, H. Sann, Marek Gaździcki, R. Brockmann, E. Gladysz, Predrag Buncic, Peter Graham Jones, G. Odyniec, E. Schäfer, Jozsef Molnar, D. Irmscher, R. Bock, J. W. Mitchell, P. Seyboth, A. Yu. Semenov, S. Euler, J. Bartke, M. Toy, T. A. Yates, D. Vranic, F. Eckhardt, M. Cyprian, Gunther Roland, J. Grebieszkow, Christof Roland, P. Chan, J. W. Harris, H. Rudolph, H. G. Ritter, E. Skrzypczak, P. B. Cramer, N. Buncic, Rainer Arno Ernst Renfordt, J. Seyerlein, Peter Levai, A. Piper, H. Ströbele, G. Igo, J. Gál, D. Cebra, J. Günther, V. Eckardt, S. Trentalange, Apostolos Panagiotou, T. A. Trainor, I. Szentpetery, I. Huang, Ferenc Sikler, P. Freund, L. Wood, D. D. Weerasundara, D. Schmischke, D. Flierl, H. G. Fischer, Dieter Røhrich, H. Appelshäuser, G.E. Cooper, G. Pálla, X. Z. Zhu, K. Kadija, A. Sandoval, S. Hegyi, M. Fuchs, J. Bächler, V. I. Kolesnikov, H. L. Caines, Andrzej Rybicki, T. Wienold, P. Csato, R. Stock, Panagiota Foka, O. Dietz, F. Gabler, B. Lasiuk, I. Derado, A. Mock, Z. Fodor, H. Hümmler, W. Retyk, and Alexander Malakhov
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Proton, Spectrometer, Nuclear Theory, Collision, Projection (linear algebra), Nuclear physics, Time of flight, Energy flow, Rapidity, Nuclear Experiment, Nucleon
Abstract: We discuss preliminary data on stopping for central Pb + Pb collisions at 158 GeV/nucleon. The (net) proton rapidity density measured by the NA49 Time Projection Chambers, NA49 Time of Flight and the NA44 spectrometer is presented. Slightly higher stopping is observed relative to S + S at 200 GeV/nucleon. The rapidity density exhibits a plateau around mid-rapidity which is qualitatively different from results at the AGS and BEVALAC/SIS energies. The second part of the paper discusses the azimuthal correlation of the energy flow. Preliminary results reveal that the ‘fireball’ preserves the information of the collision geometry even at SPS energies.
Published: 1996

22. Testing QCD predictions for multiplicity distributions at HERA

Author: S. Hegyi
Subjects: Physics, Quantum chromodynamics, High Energy Physics - Phenomenology, Nuclear and High Energy Physics, Particle physics, High Energy Physics - Phenomenology (hep-ph), Scattering, Negative binomial distribution, FOS: Physical sciences, Perturbative QCD, High Energy Physics::Experiment, Multiplicity (mathematics), HERA
Abstract: On the basis of a recently introduced generalization of the negative binomial distribution the influence of higher-order perturbative QCD effects on multiplicity fluctuations are studied for deep inelastic e^+p scattering at HERA energies. It is found that the multiplicity distributions measured by the H1 Collaboration indicate violation of infinite divisibility in agreement with pQCD calculations. Attention is called to future experimental analysis of combinants whose nontrivial sign-changing oscillations are predicted using the generalized negative binomial law., Comment: 10 pages LaTeX, 2 figures in separate Postscript file
Published: 1996

23. Transverse Energy Production inPb208+ Pb Collisions at 158 GeV per Nucleon

Author: A. Petridis, H. L. Caines, H. Sann, H. G. Ritter, J. Kecskemeti, P. Chan, R. Bock, X. Z. Zhu, Gergely Palla, J. Seyerlein, I. Derado, D. J. Prindle, M. Fuchs, F. Eckhardt, J. Bartke, Panagiota Foka, M. A. Bloomer, P. Seyboth, C. Bormann, P. B. Cramer, J. G. Cramer, P. Buncic, Zoltan Fodor, A. Sandoval, C. O. Blyth, G. Igo, R. Brockmann, Rainer Arno Ernst Renfordt, S. Margetis, E. Skrzpczak, E. Gładysz, Helena Bialkowska, J. Sziklai, T. A. Trainor, Kreso Kadija, P. Csato, I. Szentpetery, R. Stock, P. Freund, H. G. Fischer, J. G̈nther, S. Schönfelder, A. Piper, Marek Kowalski, J. Palinkas, Gyorgy Vesztergombi, Ferenc Sikler, F. P. Brady, Siegfried Wenig, H. Rudolph, L. A. Hill, C. A. Whitten, M. I. Ferguson, A. M. Poskanzer, S. Hegyi, G. Odyniec, I. Huang, G. E. Cooper, B. Lasiuk, L. Wood, W. Rauch, H. Ströbele, J. Bächler, M. Toy, J. Grebieszkow, J. M. Nelson, T. Wienold, D. Irmscher, J. Dunn, T. Alber, A. K̈hmichel, Peter Graham Jones, S. Euler, J. Gál, M. A. Howe, R. Zybert, W. Retyk, P. Jacobs, F. P̈hlhofer, D. Cebra, S. Trentalange, Apostolos Panagiotou, A. Mock, F. Bieser, J. W. Mitchell, J. Zimányi, V. Eckardt, K. Runge, Norbert Schmitz, J. W. Harris, E. Schäfer, M. Vassiliou, M. Gaadzicki, W. Heck, D. Vranic, Dieter Røhrich, and H. Appelshäuser
Subjects: Particle physics, Energy loss, Energy (psychological), Energy density, General Physics and Astronomy, Humanities
Abstract: Author(s): Margetis, S.; Alber, T.; Appelshauser, H.; Bachler, J.; Bartke, J.; Bialkowska, H.; Bieser, F.; Bloomer, M.A.; Blyth, C.O.; Bock, R.; Bormann, C.; Brady, F.P.; Brockmann, R.; Buncic, P.; Caines, H.L.; Cebra, D.; Chan, P.; Cooper, G.E.; Cramer, J.G.; Cramer, P.B.; Csato, P.; Derado, I.; Dunn, J.; Eckardt, V.; Eckhardt, F.; Euler, S.; Ferguson, M.I.; Fischer, H.G.; Fodor, Z.; Foka, P.; Freund, P.; Fuchs, M.; Gal, J.; Gasdzicki, M.; Gladysz, E.; Grebieszkow, J.; Gunther, J.; Harris, J.W.; Heck, W.; Hegyi, S.; Hill, L.A.; Huang, I.; Howe, M.A.; Igo, G.; Irmscher, D.; Jacobs, P.; Jones, P.G.; Kadija, K.; Kecskemeti, J.; Kowalski, M.; Kuhmichel, A.; Lsdiuk, B.; Margetis, S.; Mitchell, J.W.; Mock, A.; Nelson, J.M.; Odyniec, G.J.; Palinkas, J.; Palla, G.; Panagiotou, A.D.; Petridis, A.; Piper, A.; Poskanzer, A.M.; Prindle, D.J.; Puhlhofer, F.; Rauch, W.; Renfordt, R.; Retyk, W.; Ritter, Hans G.; Rohrich, D.; Rudolph, H.; Runge, K.; Sandoval, A.; Sann, H.; Schafer, E.; Schmitz, N.; Schonfelder, S.; Seyboth, P.; Seyerlein, J.; Sikler, F.; Skrzypczak, E.; Stock, R.; Stroebele, H.; Szentpetery, I.; Sziklai, J.
Published: 1995

24. Scaling laws in hierarchical clustering models with Poisson superposition

Author: S. Hegyi
Subjects: Physics, Quantum chromodynamics, Nuclear and High Energy Physics, Particle physics, Void (astronomy), Scaling law, Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, Poisson distribution, Hierarchical clustering, High Energy Physics - Phenomenology, symbols.namesake, Superposition principle, High Energy Physics - Phenomenology (hep-ph), symbols, Statistical physics, Cumulant, Scaling
Abstract: Properties of cumulant- and combinant ratios are studied for multihadron final states composed of Poisson distributed clusters. The application of these quantities to ``detect'' clusters is discussed. For the scaling laws which hold in hierarchical clustering models (void scaling, combinant scaling) a generalization is provided. It is shown that testing hierarchical models is meaningful only for phase-space volumes not larger than the characteristic correlation length introduced by Poisson superposition. Violation of the scaling laws due to QCD effects is predicted., Comment: 14 pages, Plain TeX, no figures
Published: 1994

25. Combinants, scaling, and linked pair approximation

Author: S. Hegyi
Subjects: Physics, Nuclear and High Energy Physics, Pair approximation, Negative binomial distribution, Multiplicity (mathematics), Computer Science::Social and Information Networks, Statistical physics, Scaling, lcsh:Physics, lcsh:QC1-999
Abstract: Properties of multiplicity combinants are studied with regard to the linked Pair Approximation (LPA) for the higher order cumulant correlations. A generalization of the so-called χ-scaling test of the LPA is presented. It is obtained by the construction of a whole set of scaling functions χ N on the basis of combinants. The scaling functions are investigated for the Negative Binomial Distribution.
Published: 1993

26. Azimuthal Anisotropy ofπ0Production inAu+AuCollisions atsNN=200 GeV: Path-Length Dependence of Jet Quenching and the Role of Initial Geometry

Author: L. Tomášek, V. S. Pantuev, T. Horaguchi, Charles Maguire, Kiyoshi Tanida, E. Kistenev, K. Okada, B. Sahlmueller, H. En'yo, M. J. Leitch, Y. Tanaka, K. A. Drees, S. Hegyi, L. Baksay, B. Love, J. P. Wood, K. Das, E. P. Hartouni, A. G. Litvinenko, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, O. Drapier, Frank Ellinghaus, M. Issah, T. Kempel, Dong-Hun Kim, E. R. Kinney, B. Azmoun, A. Král, F. Matathias, Kensuke Homma, E. Richardson, Maya Hachiya Shimomura, K. Watanabe, D. P. Morrison, S. Campbell, Y. I. Makdisi, S. Bathe, Y. J. Kwon, Agneta Oskarsson, R. A. Soltz, S. Afanasiev, K. Shoji, A. Kozlov, Tatsuya Chujo, P. Constantin, R. Seto, M. Grosse Perdekamp, Y. Berdnikov, M. E. Connors, Y. Akiba, M. Ouchida, M. Mishra, S. Nagamiya, P. W. Stankus, M. J. Tannenbaum, N. Means, D. Kotchetkov, J. Newby, H. Torii, K. I. Hahn, B. Bassalleck, M. Oka, S. Dairaku, A. Deshpande, Vaclav Vrba, Klaus Johannes Reygers, D. Hornback, Rui Wei, Peter Christiansen, T. L. Thomas, M. Rosati, M. Heffner, Alice Mignerey, A. Dion, Taku Gunji, H. Gong, I. Danchev, J. Seele, J. Jin, D. Winter, D. Yu Peressounko, M. Konno, Ryugo S. Hayano, P. Tarján, E. M. Takagui, A. Taranenko, F. Kajihara, Y. Riabov, M. Virius, Kenta Shigaki, Kazushi Miki, Takao Sakaguchi, Brajesh K. Singh, M. Nguyen, Atsushi Taketani, A. S. Nyanin, K. N. Barish, A. D. Frawley, Rachid Nouicer, A. A. Vinogradov, C. H. Chen, Y. Watanabe, Y. Ikeda, A. Enokizono, P. Liebing, S. Huang, H. Qu, Senta Greene, C. L. Woody, A. Berdnikov, S. Tarafdar, S. Butsyk, E. J. Mannel, R. Pak, W. Holzmann, Jiangyong Jia, Y. Goto, A. Glenn, A. T. Basye, I. Younus, R. S. Towell, S. Zhou, I. Garishvili, Hideki Hamagaki, K. Aoki, F. Wei, B. Fadem, E. O'Brien, Eva Haslum, B. Lenzi, G. David, N. Kamihara, S. Sano, Kyeongpil Lee, I. V. Sourikova, S. D. Rolnick, J. Ide, C. Pinkenburg, D. Kawall, C. Y. Chi, Ajit Kumar Mohanty, T. A. Shibata, Kazuyoshi Kurita, G. Roche, T. Sato, C. Baumann, S. Kametani, H. Themann, T. Ichihara, C. P. Singh, B. M. Johnson, M. L. Brooks, A. Drees, Jongmin Lee, O. Dietzsch, M. Proissl, A. Isupov, J. Sziklai, E. T. Atomssa, H. Valle, Marisilvia Donadelli, V. Bumazhnov, D. Lynch, X. He, Andry Malala Rakotozafindrabe, Brian Cole, J. Murata, Takahiro Fusayasu, Dipanwita Dutta, M. Gonin, D. S. Jumper, Y. Aramaki, V. Peresedov, T. Dahms, R. Tanabe, Alexander Malakhov, Gerd Joachim Kunde, J. Koster, Julia Velkovska, D. Silvermyr, I. Shein, A. Yu. Semenov, A. Sukhanov, Rushan Han, H. Masui, L. S. Zolin, H. Pereira, Vladimir Samsonov, Y. Morino, W. J. Park, Christopher Rosen, A. A. Bickley, K. Sedgwick, I. Ravinovich, Tamas Ferenc Csorgo, A. Yanovich, M. Bai, J. L. Nagle, S. Yokkaichi, K. B. Lee, S. N. White, A. K. Purwar, K. Fujiwara, Zhiying You, Y. J. Mao, R. Bennett, M. Kawashima, Y. L. Yamaguchi, M. Finger, J. H. Kang, Zvi Hirsh Citron, J. S. Haggerty, Mate Csanad, Hongfang Liu, D. E. Fields, K. Nakano, B. V. Jacak, W. E. Sondheim, E. Leitner, M. Naglis, D. Ivanischev, D. Roach, K. M. Kijima, C. L. Silva, P. A. Rukoyatkin, Y. Onuki, Y. S. Lai, M. McCumber, H. W. Van Hecke, B. Meredith, Xingguo Li, S. P. Sorensen, M. Chiu, A. Kiss, Masayasu Ishihara, John Hill, Henner Buesching, Steve Edwards, Toru Sugitate, Jan Rak, R. Lacey, O. Chvala, Seong H. Kim, J. Hanks, Sung Keun Park, N. N. Ajitanand, J. T. Mitchell, C. A. Ogilvie, Kisung Lee, T. K. Hemmick, Yasuo Miake, R. Seidl, J. G. Lajoie, Marcus Hohlmann, I. J. Choi, A. Kravitz, François Fleuret, R. P. Pisani, Takahiro Nakamura, L. Kochenda, Vladislav Manko, L. A. Linden Levy, M. Slunečka, R. Granier de Cassagnac, Susumu Oda, K. Sakashita, A. Durum, Y. Fukao, A. Adare, S. Belikov, Catherine Micaela Silvestre, K. Yamaura, Jason Kamin, T. Hester, S. P. Stoll, Martin Purschke, S. Sawada, C. Vale, J. Ying, S. S.E. Rosendahl, G. Bunce, A. Franz, N. A. Sparks, Christine Angela Aidala, Y. Nakamiya, D. Jouan, A. Morreale, Z. Fraenkel, R. K. Choudhury, G. Baksay, K. S. Joo, N. Grau, M. Wysocki, D. Sharma, R. Ichimiya, K. S. Sim, Motoi Inaba, R. M. Wright, C. M. Camacho, Prashant Shukla, S. F. Pate, Y. J. Kim, H. Al-Bataineh, V. Papavassiliou, R. Yang, K. Imai, K. Karatsu, Anne Marie Sickles, G. R. Young, B. Komkov, Norio Saito, Minghui Liu, M. A. L. Leite, Kenneth Francis Read, R. Belmont, J. S. Kapustinsky, A. V. Kazantsev, V. Babintsev, G. S. Kyle, James Alexander, R. Averbeck, Byung-Sik Hong, P. Mikeš, A. Bazilevsky, Philippe Rosnet, Alexandre Lebedev, D. M. Lee, K. Kiriluk, E. H. Kim, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Tadaaki Isobe, P. L. McGaughey, Jen-Chieh Peng, R. Vértesi, Inkyu Park, J. E. Frantz, Xiong Wang, Alexei Khanzadeev, E. Stenlund, Dong Jo Kim, J. Hamblen, J. M. Durham, T. V. Moukhanova, E. J. Desmond, M. Togawa, E. Vazquez-Zambrano, J. Park, A. Veicht, Y. Tsuchimoto, I. Tserruya, Yu. Efremenko, I. E. Yushmanov, V. Singh, H. A. Gustafsson, Johannes Peter Wessels, C. Zhang, Eunja Kim, Beomkyu Kim, K. Boyle, Wei Xie, M. I. Nagy, D. Watanabe, M. D. Malik, E. Vznuzdaev, P. Ružička, Viktor Riabov, S. Esumi, W. A. Zajc, V. Baublis, A. Denisov, V. Cianciolo, D. Isenhower, A. Toia, Sergey Fokin, M. Kurosawa, P. Chung, A. Datta, and H. Pei
Subjects: Physics, Quantum chromodynamics, 010308 nuclear & particles physics, Elliptic flow, Hadron, General Physics and Astronomy, Perturbative QCD, Elementary particle, 01 natural sciences, Gluon, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Anisotropy, Jet quenching
Abstract: We have measured the azimuthal anisotropy of pi(0) production for 1 < p(T) < 18 GeV/c for Au + Au collisions at root s(NN) = 200 GeV. The observed anisotropy shows a gradual decrease for 3 less than or similar to p(T) less than or similar to 7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least similar to 10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-length dependence steeper than what is implied by current PQCD energy-loss models show reasonable agreement with the data.
Published: 2010

27. Elliptic and Hexadecapole Flow of Charged Hadrons inAu+AuCollisions atsNN=200 GeV

Author: D. Sharma, R. Ichimiya, B. Azmoun, A. Král, M. Oka, A. Dion, Atsushi Taketani, A. Enokizono, P. Liebing, Martin Purschke, Mate Csanad, A. Morreale, Z. Fraenkel, C. M. Camacho, M. Rosati, R. K. Choudhury, K. Karatsu, S. Dairaku, E. H. Kim, Alice Mignerey, Y. Nakamiya, Sung Keun Park, Prashant Shukla, L. Tomášek, V. S. Pantuev, R. A. Soltz, S. F. Pate, Marisilvia Donadelli, M. Gonin, Anne Marie Sickles, V. Bumazhnov, Y. J. Mao, B. Meredith, N. N. Ajitanand, S. Esumi, H. Al-Bataineh, R. Pak, M. Grosse Perdekamp, M. E. Connors, E. J. Desmond, A. A. Vinogradov, Minghui Liu, A. Sukhanov, H. Pereira, S. Tarafdar, Y. Tanaka, W. A. Zajc, Andry Malala Rakotozafindrabe, G. Baksay, M. Togawa, E. Vazquez-Zambrano, N. Kamihara, G. R. Young, S. Bathe, H. Qu, K. A. Drees, V. Baublis, A. Denisov, Takao Sakaguchi, R. P. Pisani, V. Cianciolo, K. Okada, Y. Morino, Jiangyong Jia, Y. Goto, Kenneth Francis Read, S. Hegyi, Eva Haslum, B. Lenzi, B. Sahlmueller, H. En'yo, J. H. Kang, John Hill, V. Papavassiliou, K. N. Barish, M. Virius, Y. J. Kim, Agneta Oskarsson, M. J. Leitch, J. Park, Y. Onuki, J. S. Haggerty, Sergey Fokin, Hideki Hamagaki, K. Aoki, R. Tanabe, Kazuyoshi Kurita, K. Tanida, S. Afanasiev, G. David, J. T. Mitchell, A. D. Frawley, Jan Rak, Takahiro Nakamura, Peter Christiansen, A. Drees, M. Kurosawa, Y. Fukao, R. Seidl, Tadaaki Isobe, B. Komkov, R. Lacey, J. Newby, D. Winter, L. Baksay, D. Yu Peressounko, Y. J. Kwon, T. Hester, Y. Berdnikov, Y. Akiba, Toru Sugitate, R. Granier de Cassagnac, A. Adare, Vladislav Manko, M. Slunečka, Y. Tsuchimoto, P. Tarján, Johannes Peter Wessels, M. Ouchida, S. P. Sorensen, Charles Maguire, S. Huang, C. H. Chen, M. Mishra, Norio Saito, S. Nagamiya, N. A. Sparks, K. Sakashita, H. A. Gustafsson, S. Belikov, P. L. McGaughey, N. Means, M. A. L. Leite, P. Chung, K. Das, M. Wysocki, E. P. Hartouni, Susumu Oda, D. Hornback, D. Kotchetkov, O. Chvala, C. Zhang, M. Heffner, I. E. Yushmanov, S. Sano, W. Holzmann, Vaclav Vrba, Klaus Johannes Reygers, A. Durum, Maya Hachiya Shimomura, Seong H. Kim, M. Issah, N. Grau, Jason Kamin, A. Glenn, E. Kistenev, P. Ružička, K. S. Sim, C. Vale, A. Taranenko, T. Kempel, Dong-Hun Kim, Rui Wei, Senta Greene, Alexei Khanzadeev, Y. I. Makdisi, J. G. Lajoie, Beomkyu Kim, K. Boyle, Christine Angela Aidala, S. P. Stoll, I. Ravinovich, Kazushi Miki, A. V. Kazantsev, Catherine Micaela Silvestre, A. Datta, E. Stenlund, Rushan Han, A. T. Basye, Wei Xie, Motoi Inaba, Brajesh K. Singh, K. Yamaura, R. M. Wright, Viktor Riabov, R. Belmont, J. S. Kapustinsky, S. Sawada, V. Babintsev, H. Pei, A. K. Purwar, B. Fadem, K. Fujiwara, E. O'Brien, Vladimir Samsonov, I. J. Choi, A. Kravitz, S. S.E. Rosendahl, G. Bunce, M. Bai, O. Dietzsch, J. Ying, A. Franz, P. Mikeš, G. S. Kyle, T. Horaguchi, C. L. Woody, A. Berdnikov, K. B. Lee, F. Matathias, François Fleuret, Y. S. Lai, K. Watanabe, M. Proissl, E. T. Atomssa, H. Valle, A. Yu. Semenov, Kensuke Homma, E. Richardson, Y. L. Yamaguchi, Ajit Kumar Mohanty, James Alexander, T. A. Shibata, M. J. Tannenbaum, Dipanwita Dutta, P. Constantin, H. Torii, K. Shoji, T. Sato, R. Averbeck, Byung-Sik Hong, K. I. Hahn, A. Bazilevsky, E. Leitner, Hongfang Liu, D. Jouan, D. E. Fields, T. C. Awes, Kyoichiro Ozawa, T. Liška, B. Bassalleck, Julia Velkovska, B. V. Jacak, D. Roach, Philippe Rosnet, J. S. Bok, M. Chiu, M. Konno, J. Hamblen, P. W. Stankus, J. M. Durham, Tamas Ferenc Csorgo, K. M. Kijima, S. N. White, Alexandre Lebedev, C. A. Ogilvie, M. McCumber, D. M. Lee, Zhiying You, M. I. Nagy, R. Bennett, T. K. Hemmick, H. W. Van Hecke, I. V. Sourikova, J. L. Nagle, M. Kawashima, T. L. Thomas, D. Isenhower, A. Toia, D. Watanabe, K. Kiriluk, Yasuo Miake, M. D. Malik, S. Yokkaichi, Xingguo Li, T. V. Moukhanova, E. Vznuzdaev, M. Finger, L. Kochenda, M. L. Brooks, Y. Ikeda, Ryugo S. Hayano, Jongmin Lee, E. J. Mannel, Y. Riabov, A. Kiss, R. Vértesi, J. Hanks, Kenta Shigaki, M. Nguyen, D. Lynch, C. Pinkenburg, Zvi Hirsh Citron, Henner Buesching, Taku Gunji, H. Gong, J. Seele, Steve Edwards, A. S. Nyanin, G. Roche, F. Kajihara, Rachid Nouicer, D. S. Jumper, K. S. Lee, T. Dahms, K. Nakano, X. He, Marcus Hohlmann, L. A. Linden Levy, S. Butsyk, Y. Aramaki, V. Peresedov, W. E. Sondheim, S. Zhou, D. Ivanischev, S. D. Rolnick, J. Koster, J. E. Frantz, H. Masui, A. A. Bickley, B. Love, P. A. Rukoyatkin, T. Ichihara, A. G. Litvinenko, Takahiro Fusayasu, Alexander Malakhov, A. Kozlov, R. Seto, D. Silvermyr, L. S. Zolin, W. J. Park, Christopher Rosen, I. Danchev, A. Yanovich, R. S. Towell, I. Garishvili, F. Wei, Kyeongpil Lee, J. Ide, C. Y. Chi, C. Baumann, S. Kametani, C. P. Singh, B. M. Johnson, A. Isupov, J. Sziklai, Brian Cole, J. Jin, E. M. Takagui, D. Kawall, H. Themann, J. Murata, Gerd Joachim Kunde, I. Shein, K. Sedgwick, A. Deshpande, Y. Watanabe, I. Younus, Jen-Chieh Peng, M. Naglis, C. L. Silva, Masayasu Ishihara, Inkyu Park, Xiong Wang, Dong Jo Kim, A. Veicht, I. Tserruya, Yu. Efremenko, V. Singh, R. Yang, K. Imai, Eunja Kim, J. P. Wood, Alexander Milov, I. Nakagawa, R. Luechtenborg, T. Engelmore, O. Drapier, Frank Ellinghaus, E. R. Kinney, D. P. Morrison, S. Campbell, Tatsuya Chujo, and K. S. Joo
Subjects: Physics, Nuclear reaction, 010308 nuclear & particles physics, Elliptic flow, Hadron, General Physics and Astronomy, Elementary particle, Fermion, 01 natural sciences, Charged particle, Nuclear physics, Pseudorapidity, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Differential measurements of the elliptic (upsilon(2)) and hexadecapole (upsilon(4)) Fourier flow coefficients are reported for charged hadrons as a function of transverse momentum (p(T)) and collision centrality or number of participant nucleons (N-part) for Au + Au collisions at root s(NN) = 200 GeV/ The upsilon(2,4) measurements at pseudorapidity vertical bar eta vertical bar
Published: 2010

28. Transverse momentum dependence ofηmeson suppression in Au+Au collisions atsNN=200GeV

Author: J. H. Kang, Vladimir Samsonov, J. S. Haggerty, S. Afanasiev, A. Ster, S. Sano, J. Newby, Tamas Ferenc Csorgo, M. Gonin, T. L. Thomas, J. L. Nagle, Marisilvia Donadelli, V. Bumazhnov, Andry Malala Rakotozafindrabe, R. Tanabe, D. Layton, W. C. Chang, Rushan Han, R. A. Soltz, H. Borel, D. Hornback, S. Dairaku, Ryugo S. Hayano, A. Deshpande, O. Dietzsch, M. Proissl, Y. Riabov, A. Sukhanov, K. Shoji, Y. S. Lai, M. Heffner, A. Taranenko, E. T. Atomssa, H. Valle, Kenta Shigaki, B. Komkov, K. N. Barish, H. Pereira, Y. Morino, O. Zaudtke, B. Meredith, K. S. Joo, Y. Nakamiya, M. Nguyen, Dipanwita Dutta, P. W. Stankus, M. Grosse Perdekamp, Y. Watanabe, S. Belikov, Kazushi Miki, T. Horaguchi, Z. Fraenkel, Norio Saito, M. A. L. Leite, A. Yu. Semenov, Hongfang Liu, R. Vértesi, Julia Velkovska, M. I. Nagy, J. Gosset, D. Watanabe, G. Baksay, A. S. Nyanin, Maya Hachiya Shimomura, M. Virius, M. E. Connors, B. V. Jacak, M. L. Brooks, Minghui Liu, Brajesh K. Singh, Y. Fukao, K. Karatsu, John Hill, I. Younus, Y. I. Makdisi, B. Love, Rachid Nouicer, M. D. Malik, E. Vznuzdaev, R. S. Towell, D. E. Fields, Y. J. Kim, J. T. Mitchell, M. Rosati, A. G. Litvinenko, Anne Marie Sickles, D. Kotchetkov, S. P. Sorensen, C. A. Ogilvie, M. McCumber, D. Sharma, R. Ichimiya, K. O. Eyser, A. K. Purwar, K. Fujiwara, Tae-Yeon Lee, R. Seidl, T. K. Hemmick, A. Kozlov, R. Seto, K. Haruna, Kenneth Francis Read, A. Soldatov, T. Hester, L. Tomášek, R. Belmont, J. S. Kapustinsky, V. Babintsev, C. Zhang, A. A. Vinogradov, A. V. Kazantsev, Yasuo Miake, Y. Tanaka, C. A. Rosen, I. Garishvili, F. Wei, N. A. Sparks, E. H. Kim, Martin Purschke, Kyeongpil Lee, Vladislav Manko, H. Qu, Jen-Chieh Peng, C. H. Chen, M. Slunečka, Toru Sugitate, G. R. Young, S. Tarafdar, I. Danchev, Hideki Hamagaki, K. Aoki, V. S. Pantuev, L. Aphecetche, A. Glenn, M. J. Tannenbaum, S. Yokkaichi, X. He, K. A. Drees, O. Chvala, Seong H. Kim, J. Ide, C. Y. Chi, Inkyu Park, J. Hanks, Xiong Wang, Peter Christiansen, Jiangyong Jia, Y. Goto, D. Winter, L. Kochenda, Y. Onuki, S. Hegyi, G. David, J. E. Frantz, M. Ouchida, N. Means, D. Yu Peressounko, E. Leitner, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Jan Rak, K. Watanabe, J. Asai, Dong Jo Kim, P. Ružička, H. Torii, M. Naglis, C. L. Silva, R. Lacey, Sung Keun Park, J. G. Lajoie, Yorito Yamaguchi, C. Vale, B. S. Chang, Christine Angela Aidala, J. Klay, P. Mikeš, Y. Aramaki, V. Peresedov, Eva Haslum, B. Lenzi, R. Pak, P. Tarján, R. Granier de Cassagnac, A. Adare, D. Mukhopadhyay, A. Morreale, Johannes Peter Wessels, S. Rembeczki, Jongmin Lee, C. Pinkenburg, L. Baksay, N. N. Ajitanand, Viktor Riabov, V-N. Tram, N. Grau, N. Kamihara, S. Sawada, J. Ying, A. Franz, M. Issah, J. Koster, S. Batsouli, H. Masui, A. K. Dubey, F. Matathias, Shingo Sakai, I. J. Choi, A. Kravitz, A. Veicht, E. J. Desmond, K. Tanida, Eun Joo Kim, M. Stepanov, G. Roche, Masayasu Ishihara, H. Pei, D. Lynch, Kensuke Homma, Kazuyoshi Kurita, E. Richardson, H. W. Van Hecke, A. A. Bickley, K. Okada, R. K. Choudhury, A. Hadj Henni, B. Sahlmueller, I. Tserruya, B. Azmoun, Yu. Efremenko, A. Král, M. J. Kweon, Takahiro Nakamura, A. Drees, K. B. Lee, P. Constantin, S. Chernichenko, J. Jin, E. M. Takagui, G. S. Kyle, C. L. Woody, A. Berdnikov, T. Kempel, Dong-Hun Kim, V. Singh, H. En'yo, S. Esumi, M. Togawa, M. J. Leitch, K. I. Hahn, K. S. Sim, C. Baumann, S. Kametani, E. Vazquez-Zambrano, F. Staley, D. Kawall, Motoi Inaba, Beomkyu Kim, K. Boyle, James Alexander, J. Park, B. Bassalleck, D. S. Jumper, Alice Mignerey, C. P. Singh, K. Sakashita, K. S. Lee, C. M. Camacho, V. Dzhordzhadze, H. Å Gustafsson, Wei Xie, Prashant Shukla, R. M. Wright, Y. Kwon, B. M. Johnson, K. Das, H. Themann, Susumu Oda, Mate Csanad, M. Konno, A. Kiss, V. L. Rykov, T. Dahms, R. Yang, R. Averbeck, Byung-Sik Hong, A. Bazilevsky, E. P. Hartouni, S. F. Pate, A. Durum, A. Isupov, C. Suire, Henner Buesching, Senta Greene, Jason Kamin, K. Imai, J. Sziklai, W. A. Zajc, François Fleuret, Philippe Rosnet, J. Murata, M. Oka, A. T. Basye, Brian Cole, Steve Edwards, I. Ravinovich, Takao Sakaguchi, Catherine Micaela Silvestre, S. P. Stoll, I. V. Sourikova, T. C. Awes, H. Al-Bataineh, Gerd Joachim Kunde, Alexandre Lebedev, V. Baublis, A. Denisov, Y. Tsuchimoto, Kyoichiro Ozawa, T. Liška, K. Yamaura, Charles Maguire, J. S. Bok, V. Cianciolo, C. Klein-Boesing, B. Fadem, A. Dion, David D'Enterria, S. S.E. Rosendahl, G. Bunce, I. Shein, Y. Tomita, E. O'Brien, J. P. Wood, M. Bai, Sergey Fokin, Marcus Hohlmann, A. D. Frawley, Jun Kikuchi, D. M. Lee, A. Churyn, K. Sedgwick, Alexander Milov, Atsushi Taketani, D. Jouan, A. Enokizono, P. Liebing, I. Nakagawa, R. Luechtenborg, T. Engelmore, R. P. Pisani, E. Kistenev, V. Papavassiliou, S. N. White, O. Drapier, Tadaaki Isobe, L. A. Linden Levy, Frank Ellinghaus, S. Huang, K. Kiriluk, E. R. Kinney, D. P. Morrison, S. Bathe, S. Campbell, I. E. Yushmanov, W. Holzmann, Agneta Oskarsson, V. E. Semenov, D. Roach, Zvi Hirsh Citron, K. M. Kijima, Tatsuya Chujo, Y. Berdnikov, Zhiying You, Y. Akiba, R. Bennett, K. Nakano, M. Mishra, S. Nagamiya, M. Kawashima, W. E. Sondheim, Vaclav Vrba, Klaus Johannes Reygers, Alexei Khanzadeev, P. L. McGaughey, Rui Wei, D. Ivanischev, M. Finger, H. Iinuma, M. Wysocki, A. P.T. Palounek, Xingguo Li, P. A. Rukoyatkin, T. Ichihara, M. Chiu, Takahiro Fusayasu, E. Stenlund, Alexander Malakhov, D. Silvermyr, L. S. Zolin, W. J. Park, P. D. Barnes, A. Yanovich, J. Hamblen, J. M. Durham, T. V. Moukhanova, Taku Gunji, H. Gong, J. Seele, F. Kajihara, S. Butsyk, S. Zhou, A. Baldisseri, S. D. Rolnick, Ajit Kumar Mohanty, T. A. Shibata, T. Sato, D. Isenhower, A. Toia, L. Mašek, T. Niita, J. L. Charvet, M. Kurosawa, P. Chung, J. Imrek, A. Datta, and Y. J. Mao
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Range (particle radiation), Meson, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, 7. Clean energy, Standard deviation, Nuclear physics, Pion, 0103 physical sciences, Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Boson
Abstract: New measurements by the PHENIX experiment at the Relativistic Heavy Ion Collider for. production at midrapidity as a function of transverse momentum ((PT)) and collision centrality in root s(NN) = 200 GeV Au + Au and p + p collisions are presented. They indicate nuclear modification factors (R-AA) which are similar in both magnitude and trend to those found in earlier pi(0) measurements. Linear fits to R-AA as a function of (PT) in 5-20 GeV/c show that the slope is consistent with zero within two standard deviations at all centralities, although a slow rise cannot be excluded. Having different statistical and systematic uncertainties, the pi(0) and eta measurements are complementary at high (PT); thus, along with the extended (PT) range of these data they can provide additional constraints for theoretical modeling and the extraction of transport properties.
Published: 2010

29. Azimuthal anisotropy of π⁰ production in Au+Au collisions at sqrt((s)NN)=200 GeV: path-length dependence of jet quenching and the role of initial geometry

Author: A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, K, Aoki, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, A A, Bickley, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, C M, Camacho, S, Campbell, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, P, Constantin, M, Csanád, T, Csörgo, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, J, Hanks, R, Han, E P, Hartouni, E, Haslum, R, Hayano, M, Heffner, S, Hegyi, T K, Hemmick, T, Hester, X, He, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, J, Ide, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, J, Jia, J, Jin, B M, Johnson, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, D H, Kim, D J, Kim, E J, Kim, E, Kim, S H, Kim, Y J, Kim, E, Kinney, K, Kiriluk, A, Kiss, E, Kistenev, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K, Lee, K S, Lee, M J, Leitch, M A L, Leite, E, Leitner, B, Lenzi, P, Liebing, L A, Linden Levy, T, Liška, A, Litvinenko, H, Liu, M X, Liu, X, Li, B, Love, R, Luechtenborg, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, A C, Mignerey, P, Mikeš, K, Miki, A, Milov, M, Mishra, J T, Mitchell, A K, Mohanty, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, R, Nouicer, A S, Nyanin, E, O'Brien, S X, Oda, C A, Ogilvie, K, Okada, M, Oka, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, A K, Purwar, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, A Yu, Semenov, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, N A, Sparks, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, P, Tarján, H, Themann, T L, Thomas, M, Togawa, A, Toia, L, Tomášek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, A A, Vinogradov, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, J P, Wood, C L, Woody, R M, Wright, M, Wysocki, W, Xie, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, G R, Young, I, Younus, Z, You, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, and L, Zolin
Abstract: We have measured the azimuthal anisotropy of π⁰ production for 1p(T)18 GeV/c for Au+Au collisions at sqrt((s)NN)=200 GeV. The observed anisotropy shows a gradual decrease for 3≲p(T)≲7-10 GeV/c, but remains positive beyond 10 GeV/c. The magnitude of this anisotropy is underpredicted, up to at least ∼10 GeV/c, by current perturbative QCD (PQCD) energy-loss model calculations. An estimate of the increase in anisotropy expected from initial-geometry modification due to gluon saturation effects and fluctuations is insufficient to account for this discrepancy. Calculations that implement a path-length dependence steeper than what is implied by current PQCD energy-loss models show reasonable agreement with the data.
Published: 2010

30. Elliptic and hexadecapole flow of charged hadrons in Au+Au collisions at sq.rt(s(NN))=200 GeV

Author: A, Adare, S, Afanasiev, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, K, Aoki, Y, Aramaki, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, A A, Bickley, J S, Bok, K, Boyle, M L, Brooks, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, C M, Camacho, S, Campbell, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, M, Connors, P, Constantin, M, Csanád, T, Csörgo, T, Dahms, S, Dairaku, I, Danchev, K, Das, A, Datta, G, David, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, A, Dion, M, Donadelli, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, I, Garishvili, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H-A, Gustafsson, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, J, Hanks, R, Han, E P, Hartouni, E, Haslum, R, Hayano, M, Heffner, S, Hegyi, T K, Hemmick, T, Hester, X, He, J C, Hill, M, Hohlmann, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, S, Huang, T, Ichihara, R, Ichimiya, J, Ide, Y, Ikeda, K, Imai, M, Inaba, D, Isenhower, M, Ishihara, T, Isobe, M, Issah, A, Isupov, D, Ivanischev, B V, Jacak, J, Jia, J, Jin, B M, Johnson, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, S, Kametani, N, Kamihara, J, Kamin, J H, Kang, J, Kapustinsky, K, Karatsu, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, A, Khanzadeev, K M, Kijima, B I, Kim, D H, Kim, D J, Kim, E J, Kim, E, Kim, S H, Kim, Y J, Kim, E, Kinney, K, Kiriluk, A, Kiss, E, Kistenev, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotchetkov, A, Kozlov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K, Lee, K S, Lee, M J, Leitch, M A L, Leite, E, Leitner, B, Lenzi, P, Liebing, L A, Linden Levy, T, Liska, A, Litvinenko, H, Liu, M X, Liu, X, Li, B, Love, R, Luechtenborg, D, Lynch, C F, Maguire, Y I, Makdisi, A, Malakhov, M D, Malik, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, N, Means, B, Meredith, Y, Miake, A C, Mignerey, P, Mikes, K, Miki, A, Milov, M, Mishra, J T, Mitchell, A K, Mohanty, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, J, Murata, S, Nagamiya, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, Y, Nakamiya, T, Nakamura, K, Nakano, J, Newby, M, Nguyen, R, Nouicer, A S, Nyanin, E, O'Brien, S X, Oda, C A, Ogilvie, K, Okada, M, Oka, Y, Onuki, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J, Park, S K, Park, W J, Park, S F, Pate, H, Pei, J-C, Peng, H, Pereira, V, Peresedov, D Yu, Peressounko, C, Pinkenburg, R P, Pisani, M, Proissl, M L, Purschke, A K, Purwar, H, Qu, J, Rak, A, Rakotozafindrabe, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, E, Richardson, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, P, Rosnet, P, Rukoyatkin, P, Ruzicka, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, V, Samsonov, S, Sano, T, Sato, S, Sawada, K, Sedgwick, J, Seele, R, Seidl, A Yu, Semenov, R, Seto, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunecka, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, N A, Sparks, P W, Stankus, E, Stenlund, S P, Stoll, T, Sugitate, A, Sukhanov, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, P, Tarján, H, Themann, T L, Thomas, M, Togawa, A, Toia, L, Tomásek, H, Torii, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, A A, Vinogradov, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, F, Wei, R, Wei, J, Wessels, S N, White, D, Winter, J P, Wood, C L, Woody, R M, Wright, M, Wysocki, W, Xie, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, G R, Young, I, Younus, Z, You, I E, Yushmanov, W A, Zajc, C, Zhang, S, Zhou, and L, Zolin
Abstract: Differential measurements of the elliptic (v(2)) and hexadecapole (v(4)) Fourier flow coefficients are reported for charged hadrons as a function of transverse momentum (p(T)) and collision centrality or number of participant nucleons (N(part)) for Au+Au collisions at sq.rt(s(NN))=200 GeV. The v(2,4) measurements at pseudorapidity |η|≤0.35, obtained with four separate reaction-plane detectors positioned in the range 1.0|η|3.9, show good agreement, indicating the absence of significant Δη-dependent nonflow correlations. Sizable values for v(4)(p(T)) are observed with a ratio v(4)(p(T),N(part))/v(2)(2)(p(T),N(part))≈0.8 for 50≲N(part)≲200, which is compatible with the combined effects of a finite viscosity and initial eccentricity fluctuations. For N(part)≳200 this ratio increases up to 1.7 in the most central collisions.
Published: 2010

31. Trends in Yield and Azimuthal Shape Modification in Dihadron Correlations in Relativistic Heavy Ion Collisions

Author: Alice Mignerey, C. Baumann, J. L. Charvet, Takao Sakaguchi, S. P. Sorensen, C. L. Woody, A. Berdnikov, S. Dairaku, S. Kametani, C. P. Singh, O. Zaudtke, S. N. White, Senta Greene, M. Kurosawa, C. Klein-Boesing, O. Chvala, M. Virius, Y. Onuki, Johannes Peter Wessels, B. M. Johnson, Zvi Hirsh Citron, Y. Tanaka, Seong H. Kim, A. Isupov, C. Suire, A. T. Basye, S. Hegyi, B. Fadem, E. O'Brien, K. Watanabe, K. Shoji, X. He, L. Baksay, A. D. Frawley, C. H. Chen, S. Bathe, Jan Rak, R. Lacey, K. Nakano, J. G. Lajoie, M. Rosati, S. Huang, W. E. Sondheim, Agneta Oskarsson, A. Glenn, I. Ravinovich, D. Ivanischev, J. Sziklai, P. Chung, J. Imrek, B. Komkov, P. W. Stankus, J. T. Mitchell, Y. Berdnikov, Y. Aramaki, V. Peresedov, I. V. Sourikova, I. J. Choi, A. Kravitz, Alexei Khanzadeev, P. A. Rukoyatkin, R. Granier de Cassagnac, A. Adare, H. Pei, Vladimir Samsonov, M. Bai, R. A. Soltz, H. Borel, E. Stenlund, Sung Keun Park, W. A. Zajc, W. Holzmann, Charles Maguire, Brian Cole, T. Ichihara, A. A. Vinogradov, M. Mishra, S. Nagamiya, J. Koster, A. Datta, M. Naglis, Takahiro Fusayasu, V. Baublis, Jiangyong Jia, Y. Goto, C. L. Silva, M. Grosse Perdekamp, M. E. Connors, Tamas Ferenc Csorgo, Kiyoshi Tanida, E. Kistenev, A. Denisov, V. Cianciolo, N. N. Ajitanand, Norio Saito, Y. Tomita, M. A. L. Leite, Maya Hachiya Shimomura, V. S. Pantuev, Zhiying You, R. Seidl, Vladislav Manko, C. A. Ogilvie, M. Slunečka, R. Bennett, S. Batsouli, M. Kawashima, Alexander Malakhov, R. S. Towell, Vaclav Vrba, Klaus Johannes Reygers, Mate Csanad, D. Silvermyr, H. Masui, A. K. Dubey, A. A. Bickley, Kisung Lee, Sergey Fokin, Taku Gunji, H. Gong, J. Seele, M. Finger, T. K. Hemmick, Takahiro Nakamura, M. I. Nagy, M. Gonin, D. Watanabe, J. M. Durham, Yasuo Miake, I. Tserruya, Yu. Efremenko, V. Singh, B. Love, J. L. Nagle, J. Hamblen, M. D. Malik, Y. I. Makdisi, Jongmin Lee, Masayasu Ishihara, E. Vznuzdaev, I. Garishvili, F. Wei, L. Kochenda, M. Issah, Laurent Bernard Aphecetche, Kyeongpil Lee, J. Ide, A. Sukhanov, F. Kajihara, Rui Wei, Peter Christiansen, D. Winter, D. Yu Peressounko, S. Belikov, Emily D. Richardson, H. Pereira, Susumu Oda, A. Durum, R. Belmont, J. S. Kapustinsky, Anne Marie Sickles, A. G. Litvinenko, F. Staley, L. S. Zolin, W. J. Park, Christopher Rosen, P. D. Barnes, A. Yanovich, A. Kozlov, S. Butsyk, M. Ouchida, N. Means, J. Asai, G. R. Young, Marisilvia Donadelli, V. Bumazhnov, V. Babintsev, T. V. Moukhanova, Y. Morino, T. Kempel, Dong-Hun Kim, D. Kawall, H. Themann, K. Okada, M. J. Tannenbaum, D. Lynch, D. S. Jumper, K. A. Drees, C. Vale, H. A. Gustafsson, A. Hadj Henni, G. S. Kyle, K. Sakashita, R. Vértesi, V. L. Rykov, T. Dahms, Catherine Micaela Silvestre, K. Yamaura, O. Dietzsch, E. T. Atomssa, H. Valle, H. Torii, R. Seto, K. Haruna, B. Meredith, John Hill, C. Zhang, Shingo Sakai, S. Zhou, Andry Malala Rakotozafindrabe, B. S. Chang, Christine Angela Aidala, J. Klay, K. S. Joo, B. Sahlmueller, Beomkyu Kim, K. Boyle, H. En'yo, J. Murata, Y. Nakamiya, Y. J. Mao, Minghui Liu, Wei Xie, James Alexander, C. Y. Chi, Yasutada Akiba, Dipanwita Dutta, D. Mukhopadhyay, P. Ružička, A. Baldisseri, I. Danchev, R. Tanabe, Toru Sugitate, S. D. Rolnick, D. Layton, M. J. Leitch, K. B. Lee, S. Rembeczki, Jason Kamin, A. Kiss, Henner Buesching, R. Averbeck, Gerd Joachim Kunde, Byung-Sik Hong, K. N. Barish, Julia Velkovska, David D'Enterria, T. L. Thomas, A. Bazilevsky, G. Baksay, I. Shein, Hongfang Liu, D. E. Fields, S. P. Stoll, Viktor Riabov, J. H. Kang, Jason Newby, W. C. Chang, M. Heffner, Ajit Kumar Mohanty, Kenneth Francis Read, J. E. Frantz, T. A. Shibata, Steve Edwards, R. P. Pisani, S. S.E. Rosendahl, K. Sedgwick, S. Sano, T. Sato, Ryugo S. Hayano, François Fleuret, Alexandre Lebedev, B. V. Jacak, D. M. Lee, K. Das, Rushan Han, K. S. Sim, V. Dzhordzhadze, G. Bunce, Marcus Hohlmann, D. Roach, K. M. Kijima, Y. Kwon, J. S. Haggerty, A. V. Kazantsev, A. Deshpande, Y. Riabov, S. Esumi, E. P. Hartouni, L. A. Linden Levy, Eunja Kim, M. L. Brooks, A. Churyn, J. P. Wood, E. J. Desmond, J. Jin, Y. Fukao, Kenta Shigaki, D. Isenhower, M. McCumber, A. Toia, L. Mašek, M. Nguyen, Y. J. Kim, K. Kiriluk, P. Rosnet, K. O. Eyser, D. Jouan, A. K. Purwar, K. Fujiwara, D. Sharma, R. Yang, H. Iinuma, E. M. Takagui, T. Hester, M. Togawa, A. S. Nyanin, E. Vazquez-Zambrano, J. Park, Xingguo Li, F. Matathias, D. Kotchetkov, Y. L. Yamaguchi, R. Ichimiya, E. H. Kim, R. Pak, L. Tomášek, E. Leitner, Alexander Milov, I. Nakagawa, R. Luechtenborg, Y. Watanabe, A. P.T. Palounek, T. Engelmore, T. Niita, Rachid Nouicer, M. Proissl, Kensuke Homma, N. Kamihara, N. A. Sparks, I. Younus, P. Mikeš, H. Qu, K. Imai, Y. Tsuchimoto, P. Constantin, S. Chernichenko, H. W. Van Hecke, B. Azmoun, Kazuyoshi Kurita, A. Soldatov, J. Hanks, A. Král, M. J. Kweon, K. I. Hahn, O. Drapier, Frank Ellinghaus, B. Bassalleck, V-N. Tram, N. Grau, A. Drees, I. E. Yushmanov, E. R. Kinney, M. Konno, T. C. Awes, Kyoichiro Ozawa, T. Liška, J. S. Bok, Jun Kikuchi, Motoi Inaba, R. M. Wright, Tadaaki Isobe, P. L. McGaughey, M. Chiu, D. P. Morrison, S. Campbell, Y. S. Lai, A. Yu. Semenov, J. Gosset, Hideki Hamagaki, K. Aoki, V. E. Semenov, G. David, Tatsuya Chujo, S. Yokkaichi, Y. Ikeda, J. G. Boissevain, E. J. Mannel, Jen-Chieh Peng, C. Pinkenburg, M. Stepanov, M. Oka, A. Dion, Inkyu Park, Xiong Wang, Dong Jo Kim, Atsushi Taketani, A. Veicht, A. Enokizono, P. Liebing, Tae-Yeon Lee, Martin Purschke, S. Afanasiev, A. Ster, G. Roche, A. Morreale, D. Hornback, Z. Fraenkel, A. Taranenko, Kazushi Miki, T. Horaguchi, Brajesh K. Singh, R. K. Choudhury, S. Tarafdar, Eva Haslum, B. Lenzi, C. M. Camacho, Prashant Shukla, S. F. Pate, H. Al-Bataineh, V. Papavassiliou, S. Sawada, J. Ying, A. Franz, M. Wysocki, P. Tarján, Laboratoire SUBATECH Nantes (SUBATECH), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Laboratoire Leprince-Ringuet (LLR), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), PHENIX, Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Energy loss, 010308 nuclear & particles physics, Hadron, General Physics and Astronomy, FOS: Physical sciences, Parton, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Azimuth, Yield (chemistry), 0103 physical sciences, Heavy ion, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment
Abstract: Fast parton probes produced by hard scattering and embedded within collisions of large nuclei have shown that partons suffer large energy loss and that the produced medium may respond collectively to the lost energy. We present measurements of neutral pion trigger particles at transverse momenta p^t_T = 4-12 GeV/c and associated charged hadrons (p^a_T = 0.5-7 GeV/c) as a function of relative azimuthal angle Delta Phi at midrapidity in Au+Au and p+p collisions at sqrt(s_NN) = 200 GeV. These data lead to two major observations. First, the relative angular distribution of low momentum hadrons, whose shape modification has been interpreted as a medium response to parton energy loss, is found to be modified only for p^t_T < 7 GeV/c. At higher p^t_T, the data are consistent with unmodified or very weakly modified shapes, even for the lowest measured p^a_T. This observation presents a quantitative challenge to medium response scenarios. Second, the associated yield of hadrons opposite to the trigger particle in Au+Au relative to that in p+p (I_AA) is found to be suppressed at large momentum (IAA ~ 0.35-0.5), but less than the single particle nuclear modification factor (R_AA ~0.2)., 427 authors, 6 pages text, 3 figures, 1 table. Submitted to Phys. Rev. Lett. v2 has minor changes in response to PRL referee comments. Plain text data tables for the points plotted in figures are publicly available at http://www.phenix.bnl.gov/papers.html
Published: 2010

32. On the intermittency signature of quark-gluon plasma formation

Author: Tamas Ferenc Csorgo and S. Hegyi
Subjects: Physics, Nuclear and High Energy Physics, Phase transition, Superposition principle, Factorial, law, Quantum electrodynamics, Intermittency, Quark–gluon plasma, Elementary particle, Plasma, Scaling, law.invention
Abstract: The intermittency effect is investigated using the assumption that the observed events can be decomposed into randomly distributed self-similar clusters. It is demonstrated that the factorial moments of a single cluster can be extracted from data using the probability that a certain phase-space box is empty of secondaries. The validity of the linked-pair approximation is shown to correspond to independent superposition of monofractal clusters. It is suggested that certain scaling properties of the void probability could signal a thermal phase-transition from the quark-gluon plasma.
Published: 1992

33. Analysis of the rapidity gap probability at CERN collider energies

Author: S Hegyi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Negative binomial distribution, Elementary particle, Hadronization, law.invention, Nuclear physics, law, Supercluster, Rapidity, Collider, Scaling
Abstract: The rapidity gap probability, i.e., the probability of detecting no particles in a given rapidity interval is investigated in proton-antiproton collisions at CERN collider energies. A scaling behaviour is found in the central rapidity domain, similar to the scaling of the void probability in the Perseus-Pisces supercluster region of galaxies. This observation confirms that the recently proposed linked-pair approximation for the N-particle cumulant correlation functions holds valid to high order with linking coefficients slightly smaller than the negative binomial values. In the outer region of rapidity deviations are found from the scaling law which possibly is caused by the violation of translation invariance of the correlation functions. The correspondence to the clan production picture of hadronization is outlined: it is shown that the clan-model parameters can be obtained directly from the “hole probability”.
Published: 1992

34. System-size dependence ofΛandΞproduction in nucleus-nucleus collisions at40Aand158AGeV measured at the CERN Super Proton Synchrotron

Author: T. Anticic, B. Baatar, D. Barna, J. Bartke, H. Beck, L. Betev, H. Białkowska, C. Blume, B. Boimska, J. Book, M. Botje, J. Bracinik, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kresan, V. I. Kolesnikov, M. Kowalski, I. Kraus, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, C. Meurer, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, M. Utvić, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, Z. Włodarczyk, A. Wojtaszek, and I. K. Yoo
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, Elementary particle, Lambda baryon, 7. Clean energy, 01 natural sciences, Super Proton Synchrotron, Xi baryon, Nuclear physics, 0103 physical sciences, Transverse mass, Rapidity, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Results on Λ, Λ , and Ξ- production in centrality selected Pb+Pb reactions at 40A and 158A GeV and in near-central C+C and Si+Si reactions at 158A GeV are presented. Transverse mass spectra, rapidity spectra, and multiplicities in dependence of the system size are discussed. Comparisons to transport models (ultrarelativistic quantum molecular dynamics and hadron string dynamics) and to the core-corona approach are performed. Although Λ and Λ production can be described by transport models reasonably well, these models do not agree with the Ξ- measurements. However, the core-corona picture fits very well the system-size dependence of Λ and Ξ-, whereas it agrees less well with the Λ data.
Published: 2009

35. Energy dependence of particle ratio fluctuations in centralPb+Pbcollisions fromsNN=6.3to 17.3 GeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčcić, V. Cerny, P. Christakoglou, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, D. Kresan, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, M. Pikna, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, G. Stefanek, R. Stock, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, and I. K. Yoo
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Meson, Proton, 010308 nuclear & particles physics, Hadron, Elementary particle, Fermion, Statistical fluctuations, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract: We present measurements of the energy dependence of event-by-event fluctuations in the K/{pi} and (p+p)/{pi} multiplicity ratios in heavy-ion collisions at the CERN SPS. The particle ratio fluctuations were obtained for central Pb+Pb collisions at five collision energies, {radical}(s{sub NN}), between 6.3 and 17.3 GeV. After accounting for the effects of finite-number statistics and detector resolution, we extract the strength of nonstatistical fluctuations at each energy. For the K/{pi} ratio, larger fluctuations than expected for independent particle production are found at all collision energies. The fluctuations in the (p+p)/{pi} ratio are smaller than expectations from independent particle production, indicating correlated pion and proton production from resonance decays. For both ratios, the deviation from purely statistical fluctuations shows an increase toward lower collision energies. The results are compared to transport model calculations, which fail to describe the energy dependence of the K/{pi} ratio fluctuations.
Published: 2009

36. Energy dependence of transverse momentum fluctuations inPb+Pbcollisions at the CERN Super Proton Synchrotron (SPS) at20Ato158AGeV

Author: T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, M. Utvic, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, Z. Włodarczyk, A. Wojtaszek, and I. K. Yoo
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, 01 natural sciences, Super Proton Synchrotron, Charged particle, Nuclear physics, Baryon, Critical point (thermodynamics), 0103 physical sciences, Rapidity, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Results are presented on event-by-event fluctuations of transverse momenta p{sub T} in central Pb+Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1
Published: 2009

37. Energy dependence ofϕmeson production in centralPb+Pbcollisions atsNN=6to 17 GeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, T. Kollegger, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, D. Kresan, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson production, Isotope, 010308 nuclear & particles physics, Degrees of freedom (physics and chemistry), 7. Clean energy, 01 natural sciences, Nuclear physics, 0103 physical sciences, Thermal, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Beam energy, Energy (signal processing)
Abstract: {phi} meson production is studied by the NA49 Collaboration in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV beam energy. The data are compared with measurements at lower and higher energies and with microscopic and thermal models. The energy dependence of yields and spectral distributions is compatible with the assumption that partonic degrees of freedom set in at low SPS energies.
Published: 2008

38. Energy dependence of Λ and Ξ production in centralPb+Pbcollisions at20A,30A,40A,80A, and 158AGeV measured at the CERN Super Proton Synchrotron

Author: M. Makariev, M. K. Mitrovski, Katarzyna Grebieszkow, V. Friese, D. J. Prindle, B. Baatar, J. Pluta, Andreas Petridis, Alexander Malakhov, M. van Leeuwen, Marek Kowalski, M. Słodkowski, Gyorgy Vesztergombi, H. Ströbele, Christof Roland, D. Barna, Zbigniew Wlodarczyk, Mrowczynski, E. Gladysz, P. Dinkelaker, Michal Kreps, A. Richard, M. Szuba, M. Botje, Miroslav Pikna, Jozsef Molnar, R. Lacey, I. Kraus, P. Christakoglou, J. Zimányi, Andre Mischke, A. Wetzler, P. Csato, J. Gál, P. Chung, E. Kornas, C. Meurer, J. Sziklai, R. Stock, Gunther Roland, R. Bramm, Apostolos Panagiotou, O. Chvala, M. Utvić, B. Lungwitz, P. Seyboth, Predrag Buncic, G. L. Melkumov, D. Panayotov, D. Flierl, P. Szymanski, A. Karev, Bożena Boimska, Peter Levai, Branislav Sitar, Z. Fodor, F. Pühlhofer, J. Bracinik, T. R. Schuster, C. Strabel, Panagiota Foka, Helena Bialkowska, T. Susa, V. Eckardt, Leander Litov, Kreso Kadija, I. K. Yoo, V. Cerny, J. Bartke, V. Trubnikov, W. Peryt, Gabor Istvan Veres, V. Genchev, C. Alt, G. Stefanek, Andras Laszlo, A. Sandoval, M. Mateev, M. Vassiliou, V. Nicolic, C. Höhne, Christoph Blume, E. Skrzypczak, Andrzej Rybicki, G. Pálla, Rainer Arno Ernst Renfordt, M. Kliemant, Dezso Varga, N. Schmitz, M. Gazdzicki, A. Wojtaszek, Ferenc Sikler, S. Hegyi, Latchezar Betev, D. P. Kikola, I. Szentpetery, J. G. Cramer, Maciej Rybczyński, T. Antičić, S. Kniege, V. I. Kolesnikov, and D. Vranic
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Elementary particle, Lambda baryon, 7. Clean energy, 01 natural sciences, Super Proton Synchrotron, Xi baryon, Nuclear physics, Baryon, 0103 physical sciences, Transverse mass, Rapidity, Nuclear Experiment, 010306 general physics
Abstract: Results on {lambda},{lambda},{xi}{sup -}, and {xi}{sup +} production in central Pb+Pb reactions at 20A,30A,40A,80A, and 158A GeV are presented. The energy dependence of transverse mass spectra, rapidity spectra, and multiplicities is discussed. Comparisons to string hadronic models (UrQMD and HSD) and statistical hadron gas models are shown. Although the latter provide a reasonable description of all particle yields, the first class of models fails to match the {xi}{sup -} and {xi}{sup +} multiplicities.
Published: 2008

39. Energy dependence of multiplicity fluctuations in heavy ion collisions at20Ato158AGeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, M. Utvic, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Conservation law, 010308 nuclear & particles physics, Hadron, Elementary particle, 01 natural sciences, Charged particle, Nuclear physics, Critical point (thermodynamics), 0103 physical sciences, Quark–gluon plasma, Rapidity, Multiplicity (chemistry), Nuclear Experiment, 010306 general physics
Abstract: Multiplicity fluctuations of positively, negatively, and all charged hadrons in the forward hemisphere were studied in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV. The multiplicity distributions and their scaled variances ω are presented as functions of their dependence on collision energy as well as on rapidity and transverse momentum. The distributions have bell-like shapes and their scaled variances are in the range from 0.8 to 1.2 without any significant structure in their energy dependence. No indication of the critical point in fluctuations are observed. The string-hadronic ultrarelativistic quantum molecular dynamics (UrQMD) model significantly overpredicts the mean, but it approximately reproduces the scaled variance of the multiplicity distributions. The predictions of the statistical hadron-resonance gas model obtained within the grand-canonical and canonical ensembles disagree with the measured scaled variances. The narrower than Poissonian multiplicity fluctuations measured in numerous cases may be explained by the impact of conservation laws on fluctuations in relativistic systems.
Published: 2008

40. Bose-Einstein correlations ofπ−π−pairs in central Pb+Pb collisions at20A,30A,40A,80A, and158AGeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Meson, Proton, 010308 nuclear & particles physics, Hadron, Radius, Bose–Einstein correlations, 01 natural sciences, Nuclear physics, Pion, 0103 physical sciences, Rapidity, Atomic physics, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Measurements of Bose-Einstein correlations of {pi}{sup -}{pi}{sup -} pairs in central Pb+Pb collisions were performed with the NA49 detector at the CERN Super Proton Synchroton for beam energies of 20A,30A,40A,80A, and 158A GeV. Correlation functions were measured in the longitudinally comoving 'out-side-long' reference frame as a function of rapidity and transverse momentum in the forward hemisphere of the reaction. Radius and correlation strength parameters were obtained from fits of a Gaussian parametrization. The results show a decrease of the radius parameters with increasing transverse-momentum characteristic of strong radial flow in the pion source. No striking dependence on pion-pair rapidity or beam energy is observed. Static and dynamic properties of the pion source are obtained from simultaneous fits with a blast-wave model to radius parameters and midrapidity transverse-momentum spectra. Predictions of hydrodynamic and microscopic models of Pb+Pb collisions are discussed.
Published: 2008

41. High transverse momentum hadron spectra atsNN=17.3GeV inPb+Pbandp+pcollisions

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. László, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Hadron, Modification factor, 01 natural sciences, Spectral line, Nuclear physics, 0103 physical sciences, Transverse momentum, Saturation (graph theory), Nuclear Experiment, 010306 general physics, Relativistic Heavy Ion Collider, Energy (signal processing)
Abstract: Transverse momentum spectra up to 4.5 GeV/c around midrapidity of {pi}{sup {+-}},p,p, and K{sup {+-}} in Pb+Pb reactions were measured at {radical}(s{sub NN})=17.3 GeV by the CERN-NA49 experiment. The nuclear modification factors R{sub AA} for {pi}{sup {+-}} and R{sub CP} for {pi}{sup {+-}},p,p,K{sup {+-}} were extracted and compared with results obtained at the BNL Relativistic Heavy Ion Collider (RHIC) at {radical}(s{sub NN})=200 GeV. The modification factor R{sub AA} shows a rapid increase with transverse momentum in the covered region. This indicates that the Cronin effect is the dominating effect in our energy range. The modification factor R{sub CP}, in which the contribution of the Cronin effect is reduced, shows a saturation well below unity in the {pi}{sup {+-}} channel. The extracted R{sub CP} values follow the 200 GeV RHIC results closely in the available transverse momentum range, except for {pi}{sup {+-}} above 2.5 GeV/c transverse momentum. There the measured suppression is smaller than that observed at RHIC.
Published: 2008

42. Pion and kaon production in centralPb+Pbcollisions at20Aand30AGeV: Evidence for the onset of deconfinement

Author: Rainer Arno Ernst Renfordt, C. Strabel, Michal Kreps, Mrowczynski, C. Alt, A. Karev, F. Pühlhofer, V. Cerny, W. Peryt, A. Wetzler, Ferenc Sikler, E. Skrzypczak, Andre Mischke, D. P. Kikola, Predrag Buncic, Gunther Roland, J. Gál, Zbigniew Wlodarczyk, Gyorgy Vesztergombi, Branislav Sitar, Miroslav Pikna, P. Seyboth, Christoph Blume, Andrzej Rybicki, Panagiota Foka, C. Höhne, J. G. Cramer, M. K. Mitrovski, M. van Leeuwen, Christof Roland, Leander Litov, R. Lacey, B. Lungwitz, Katarzyna Grebieszkow, Latchezar Betev, D. Barna, P. Christakoglou, I. Kraus, J. Pluta, Andreas Petridis, P. Szymanski, Kreso Kadija, Gabor Istvan Veres, V. Friese, M. Kliemant, M. Makariev, O. Chvala, Thorsten Sven Kollegger, E. Kornas, M. Szuba, Apostolos Panagiotou, D. Flierl, V. I. Kolesnikov, G. L. Melkumov, B. Baatar, J. Sziklai, R. Bramm, P. Csato, P. Chung, S. Hegyi, R. Stock, D. Vranic, M. Slodkowski, M. Gazdzicki, D. Panayotov, N. Schmitz, D. J. Prindle, J. Zimányi, Z. Fodor, V. Trubnikov, J. Bracinik, V. Eckardt, Jozsef Molnar, Marek Kowalski, Helena Bialkowska, M. Vassiliou, Alexander Malakhov, E. Gladysz, P. Dinkelaker, Tome Anticic, T. R. Schuster, I. K. Yoo, J. Bartke, H. Ströbele, S. Kniege, Maciej Rybczyński, Tatjana Susa, A. Sandoval, M. Mateev, Bożena Boimska, Peter Levai, V. Nicolic, I. Szentpetery, Andras Laszlo, G. Pálla, M. Botje, V. Genchev, G. Stefanek, and Dezso Varga
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, Proton, 010308 nuclear & particles physics, Nuclear Theory, Hadron, 01 natural sciences, 7. Clean energy, Deconfinement, Nuclear physics, Strange matter, Pion, 0103 physical sciences, Transverse mass, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract: Results on charged pion and kaon production in central Pb+Pb collisions at 20A and 30A GeV are presented and compared to data at lower and higher energies. Around 30A GeV a rapid change of the energy dependence for the yields of pions and kaons as well as for the shape of the transverse mass spectra is observed. The change is compatible with the prediction that the threshold for production of a state of deconfined matter at the early stage of the collisions is located at low CERN Super Proton Synchroton energies.
Published: 2008

43. The Feynman fluid analogy in e+e− annihilation

Author: S. Krasznovszky and S. Hegyi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, symbols.namesake, Annihilation, symbols, Analogy, Feynman diagram, Multiplicity (chemistry), Charged particle, Multiplicity distribution, Mathematical physics
Abstract: An analysis of the charged particle multiplicity distributions observed in e + e − annihilation is given using the generalized Feynman fluid analogy of multiparticle production. Only the two- and three-particle integrated correlation functions are included into the scheme. It is shown that the model correctly describes the available experimental data from the TASSO and HRS Collaborations. Some properties of the fluid of the analogy are computed and a prediction is made for the multiplicity distribution at √ s =91 GeV.
Published: 1990

44. A prediction for multiplicity distributions at future hadronic colliders

Author: S. Hegyi and S. Krasznovszky
Subjects: Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, High Energy Physics::Phenomenology, Hadron, Tevatron, Observable, Multiplicity (mathematics), Elementary particle
Abstract: We investigate some features of the multiplicity distributions observed in nondiffractive pp and p p interactions. Our analysis concentrates mainly on the behaviour of certain momentum combinations that appears to be remarkably smoothly varying in the CM energy range 10–900 GeV. Utilizing this empirical regularity we make predictions for the multiplicity distributions at Tevatron, LHC and SSC energies.
Published: 1990

45. Rapidity and energy dependence of the electric charge correlations inA+Acollisions from20Ato158AGeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, W. Peryt, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Jet (particle physics), 01 natural sciences, Electric charge, Super Proton Synchrotron, Hadronization, Nuclear physics, 0103 physical sciences, High Energy Physics::Experiment, Rapidity, Nuclear Experiment, 010306 general physics, Nucleon, Relativistic Heavy Ion Collider
Abstract: Results from electric charge correlations studied with the Balance Function (BF) method in A+A collisions from 20A to 158A GeV are presented in two different rapidity intervals: In the midrapidity region we observe a decrease of the width of the BF distribution with increasing centrality of the collision, whereas this effect vanishes in the forward rapidity region. Results from the energy dependence study in central Pb+Pb collisions show that the narrowing of the BF expressed by the normalized width parameter W increases with energy toward the highest CERN Super Proton Synchrotron and BNL Relativistic Heavy Ion Collider energies. Finally we compare our experimental data points with the predictions of several models. The hadronic string models Ultra-relativistic Quantum Molecular Dynamics and Heavy Ion Jet INteraction Generator (HIJING) do not reproduce the observed narrowing of the BF. However, A MultiPhase Transport medel (AMPT), which contains a quark-parton transport phase before hadronization, can reproduce the narrowing of the BF's width with centrality. This confirms the proposed sensitivity of the BF analysis to the time of hadronization.
Published: 2007

46. Energy and centrality dependence ofp¯andpproduction and theΛ¯/p¯ratio in Pb+Pb collisions between 20AGeV and 158AGeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Buncić, V. Cerny, P. Christakoglou, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. Laslo, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, M. Pikna, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, I. K. Yoo, and J. Zimányi
Subjects: Nuclear reaction, Physics, Nuclear physics, Nuclear and High Energy Physics, Proton, Antiproton, Antimatter, Hadron, Transverse mass, Rapidity, Atomic physics, Nuclear Experiment, Lambda baryon
Abstract: The transverse mass m{sub t} distributions for antiprotons are measured at midrapidity for minimum bias Pb+Pb collisions at 158A GeV and for central Pb+Pb collisions at 20A, 30A, 40A, and 80A GeV beam energies in the fixed target experiment NA49 at the CERN SPS. The rapidity density dn/dy, inverse slope parameter T, and mean transverse mass derived from the m{sub t} distributions are studied as a function of the incident energy and the collision centrality and compared to the relevant data on proton production. The shapes of the m{sub t} distributions of p and p are very similar. The ratios of the particle yields, p/p and {lambda}/p, are also analyzed. The p/p ratio exhibits an increase with decreasing centrality and a steep rise with increasing beam energy. The {lambda}/p ratio increases beyond unity with decreasing beam energy.
Published: 2006

47. Bose-Einstein or HBT Correlation Signals of a Second Order QCD Phase Transition

Author: W. A. Zajc, T. Csörgő, S. Hegyi, and T. Novák
Subjects: Physics, Quantum chromodynamics, Phase transition, Correlation function (statistical mechanics), law, Quantum electrodynamics, Quantum critical point, Exponent, Critical exponent, Bose–Einstein condensate, Shape parameter, law.invention
Abstract: For particles emerging from a second order QCD phase transition, we show that a recently introduced shape parameter of the Bose‐Einstein correlation function, the Levy index of stability equals to the correlation exponent — one of the critical exponents that characterize the behaviour of the matter in the vicinity of the second order phase transition point. Hence the shape of the Bose‐Einstein / HBT correlation functions, when measured as a function of bombarding energy and centrality in various heavy ion reactions, can be utilized to locate experimentally the second order phase transition and the critical end point of the first order phase transition line in QCD.
Published: 2006

48. Elliptic flow of Lambda hyperons in Pb+Pb collisions at 158A GeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gaździcki, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, R. Lacey, A. Laszlo, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, A. Petridis, M. Pikna, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimányi
Subjects: Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Elliptic flow, Hadron, Nuclear Theory, FOS: Physical sciences, Elementary particle, 01 natural sciences, Nuclear physics, Baryon, QGP, SPS, Lambda, elliptic flow, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Physics - Experiment, Rapidity, Impact parameter, Nuclear Experiment (nucl-ex), 010306 general physics, Nucleon, Nuclear Experiment
Abstract: The elliptic flow of Lambda hyperons has been measured by the NA49 collaboration at the CERN-SPS in semi-central Pb+Pb collisions at 158A GeV. The standard method of correlating particles with the event plane was used. Measurements of v2 near mid-rapidity are reported as a function of rapidity, centrality and transverse momentum. Elliptic flow of Lambda particles increases both with the impact parameter and with the transverse momentum. It is compared with v2 for pions and protons as well as with model calculations. The observation of significant elliptic flow and its mass dependence suggest strong collective behaviour of the matter produced in collisions of heavy nuclei already at the SPS. Scaling properties of elliptic flow of different particle species have been tested at 158A GeV. The limited pT range of the data does not allow for a decisive test of the coalescence model., Comment: 6 pages, 6 figures, submitted to Physical Review C
Published: 2006
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49. A Bose-Einstein Model of Particle Multiplicity Distributions

Author: Aram Mekjian, T. Csörgö, and S. Hegyi
Subjects: Physics, Nuclear and High Energy Physics, Nuclear Theory, Critical phenomena, FOS: Physical sciences, Power law, law.invention, Nuclear Theory (nucl-th), Critical opalescence, law, Critical point (thermodynamics), Quantum mechanics, Exponent, Statistical physics, Scaling, Critical exponent, Bose–Einstein condensate
Abstract: A model of particle production is developed based on a parallel with a theory of Bose-Einstein condensation and similarities with other critical phenomena such as critical opalescence. The role of a power law critical exponent tau and Levy index alpha are studied. Various features of this model are developed and compared with other commonly used models of particle production which are shown to differ by having different values for tau, alpha. While void scaling is a feature of this model, hierarchical structure is not a general property of it. The value of the exponent tau=2 is a transition point associated with void and hierarchical scaling features. An exponent gamma is introduced to describe enhanced fluctuations near a critical point. Experimentally determined properties of the void scaling function can be used to determine tau., Comment: Accepted for publication in Nucl. Phys. A
Published: 2006
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50. Centrality and system size dependence of multiplicity fluctuations in nuclear collisions at 158 AGeV

Author: C. Alt, T. Anticic, B. Baatar, D. Barna, J. Bartke, L. Betev, H. Białkowska, C. Blume, B. Boimska, M. Botje, J. Bracinik, R. Bramm, P. Bunčić, V. Cerny, P. Christakoglou, P. Chung, O. Chvala, J. G. Cramer, P. Csató, P. Dinkelaker, V. Eckardt, D. Flierl, Z. Fodor, P. Foka, V. Friese, J. G´l, M. Gaździcki, V. Genchev, G. Georgopoulos, E. Gładysz, K. Grebieszkow, S. Hegyi, C. Höhne, K. Kadija, A. Karev, D. Kikola, M. Kliemant, S. Kniege, V. I. Kolesnikov, E. Kornas, R. Korus, M. Kowalski, I. Kraus, M. Kreps, A. Laszlo, R. Lacey, M. van Leeuwen, P. Lévai, L. Litov, B. Lungwitz, M. Makariev, A. I. Malakhov, M. Mateev, G. L. Melkumov, A. Mischke, M. Mitrovski, J. Molnár, St. Mrówczyński, V. Nicolic, G. Pálla, A. D. Panagiotou, D. Panayotov, W. Peryt, A. Petridis, M. Pikna, J. Pluta, D. Prindle, F. Pühlhofer, R. Renfordt, C. Roland, G. Roland, M. Rybczyński, A. Rybicki, A. Sandoval, N. Schmitz, T. Schuster, P. Seyboth, F. Siklér, B. Sitar, E. Skrzypczak, M. Slodkowski, G. Stefanek, R. Stock, C. Strabel, H. Ströbele, T. Susa, I. Szentpétery, J. Sziklai, M. Szuba, P. Szymanski, V. Trubnikov, D. Varga, M. Vassiliou, G. I. Veres, G. Vesztergombi, D. Vranić, A. Wetzler, Z. Włodarczyk, A. Wojtaszek, I. K. Yoo, and J. Zimńyi
Subjects: Physics, Nuclear reaction, Nuclear and High Energy Physics, Particle physics, NA49, CERN, SPS, QGP, fluctuations, multiplicity, 010308 nuclear & particles physics, Hadron, Quark model, FOS: Physical sciences, Multiplicity (mathematics), Elementary particle, 01 natural sciences, Charged particle, Nuclear physics, 0103 physical sciences, Rapidity, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), 010306 general physics, Centrality, Nuclear Experiment
Abstract: The centrality and system size dependence of multiplicity fluctuations of charged particles produced in nuclear collisions at $158 A$ GeV was studied by the NA49 collaboration. Centrality selected Pb+Pb collisions, semi-central C+C and Si+Si collisions as well as inelastic p+p interactions were analyzed. The number of projectile participants determined on an event-by-event basis was used to characterize the collision centrality. The scaled variance of the multiplicity distribution obtained in the forward rapidity region ($1.1, Comment: 16 pages, 18 figures; some typos corrected; to appear in Phys. Rev. C
Published: 2006
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