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15 results on '"Mrowczynski, S."'

1. Search for the critical point by the NA61/SHINE experiment

Author

Andronov, E., Aduszkiewicz, A., Andronov, E. V., Anticic, T., Baatar, B., Baszczyk, M., Bhosale, S., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Brylinski, W., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Bzdak, A., Cherif, H., Cirkovic, M., Csanad, M., Czopowicz, T., Damyanova, A., Davis, N., Deveaux, M., Dominik, W., Dorosz, P., Dumarchez, J., Engel, R., Feofilov, G. A., Fields, L., Fodor, Z., Garibov, A., Gazdzicki, M., Golosov, O., Golubeva, M., Grebieszkow, K., Guber, F., Haesler, A., Igolkin, S. N., Ilieva, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kaptur, Emil, Kargin, N., Kashirin, E., Kielbowicz, M., Kireyeu, V. A., Klochkov, V., Kolesnikov, V. I., Kolev, D., Korzenev, A., Kovalenko, V. N., Kowalik, K., Kowalski, Seweryn, Koziel, M., Krasnoperov, A., Kucewicz, W., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lazareva, T. V., Lewicki, M., Lojek, K., Łysakowski, Bartosz, Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Manic, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H.-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A. O., Messerly, B., Mik, L., Morozov, S., Mrowczynski, S., Nagai, Y., Naskret, M., Ozvenchuk, V., Paolone, V., Pavin, M., Petukhov, O., Planeta, R., Podlaski, P., Popov, B. A., Porfy, B., Posiadala-Zezula, M., Prokhorova, D. S., Puławski, Szymon, Puzovic, J., Rauch, W., Ravonel, M., Renfordt, R., Richter-Was, E., Rohrich, D., Rondio, E., Roth, M., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Schmidt, Katarzyna, Seryakov, A. Y., Seyboth, P., Slodkowski, M., Snoch, A., Staszel, P., Stefanek, G., Stepaniak, J., Strikhanov, M., Strobele, H., Susa, T., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Toia, A., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Valiev, F. F., Veberic, D., Vechernin, V. V., Wickremasinghe, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., and Scomparin, Enrico

Subjects
Nuclear and High Energy Physics, Particle physics, Hadron, Nuclear Theory, FOS: Physical sciences, SPS, nucl-ex, 01 natural sciences, Deconfinement, law.invention, law, Critical point (thermodynamics), Intermittency, 0103 physical sciences, CERN, ddc:530, Nuclear Physics - Experiment, Multiplicity (chemistry), Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Phase diagram, Physics, fluctuations, Large Hadron Collider, 010308 nuclear & particles physics, critical point, fluctuations, Observable
Abstract

NA61/SHINE is a fixed target experiment operating at CERN SPS. Its main goals are to search for the critical point of strongly interacting matter and to study the onset of deconfinement. For these goals a scan of the two dimensional phase diagram ($T$-$\mu_{B}$) is being performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleus interactions as a function of collision energy. In this paper the status of the search for the critical point of strongly interacting matter by the NA61/SHINE Collaboration is presented including recent results on proton intermittency, strongly intensive fluctuation observables of multiplicity and transverse momentum fluctuations. These measurements are expected to be sensitive to the correlation length and, therefore, have the ability to reveal the existence of the critical point via possible non-monotonic behavior. The new NA61/SHINE results are compared to the model predictions., Comment: 4 pages, 2 figures, to appear in a special issue of Nuclear Physics A dedicated to Quark Matter 2018

Published
2019

2. Two-particle correlations in azimuthal angle and pseudorapidity in inelastic p + p interactions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Cirkovic, M., Czopowicz, T., Damyanova, A., Davis, N., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Garibov, A., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A. E., Hierholzer, M., Hylen, J., Igolkin, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kapoyannis, A., Kaptur, E., Kielbowicz, M., Kisiel, J., Knezevic, N., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kovalenko, V., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lundberg, B., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Maksiak, B., Malakhov, A. I., Manic, D., Marchionni, A., Marcinek, A., Marino, A. D., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Merzlaya, A., Messerly, B., Mills, G. B., Morozov, S., Mrowczynski, S., Nagai, Y., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Ozvenchuk, V., Panagiotou, A. D., Paolone, V., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiadala, M., Pulawski, S., Puzovic, J., Rameika, R., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Rohrich, D., Rondio, E., Roth, M., Rubbia, A., Rumberger, B. T., Rustamov, A., Rybczynski, M., Rybicki, A., Sadovsky, A., Sakashita, K., Sarnecki, R., Schmidt, K., Sekiguchi, T., Selyuzhenkov, I., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strobele, H., Susa, T., Szuba, M., Tada, M., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Walewski, M., Wickremasinghe, A., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Zimmerman, E. D., Zwaska, R., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NA61/SHINE, Blondel, Alain, Bravar, Alessandro, Damyanova, Antoaneta, Haesler, Alexis, Korzenev, Alexander, Ravonel Salzgeber, Melody, Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), and Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS )

Subjects
NA61, Physics and Astronomy (miscellaneous), Hadron, resonance: effect, 01 natural sciences, Resonance (particle physics), angular distribution, Nuclear Experiment (nucl-ex), [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Quantum statistical mechanics, Nuclear Experiment, Physics, angular correlation: two-particle, Large Hadron Collider, Super Proton Synchrotron, error: statistical, statistics: quantum, Pseudorapidity, correlation function: ratio, Particle Physics - Experiment, correlation: two-particle, CERN, SPS, NA61/SHINE, two-particle correlation, p p: scattering, CERN Lab, 530 Physics, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, ddc:500.2, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear physics, resonance: decay, momentum: conservation law, 0103 physical sciences, ddc:530, structure, 010306 general physics, numerical calculations, Engineering (miscellaneous), Spectrometer, 010308 nuclear & particles physics, proton synchrotron, 20-158 GeV-cms/nucleon, rapidity, Particle, High Energy Physics::Experiment, hadron, spectrometer, decay: weak interaction, experimental results, acceptance
Abstract

Results on two-particle $\Delta\eta\Delta\phi$ correlations in inelastic p+p interactions at 20, 31, 40, 80, and 158~GeV/c are presented. The measurements were performed using the large acceptance NA61/SHINE hadron spectrometer at the CERN Super Proton Synchrotron. The data show structures which can be attributed mainly to effects of resonance decays, momentum conservation, and quantum statistics. The results are compared with the EPOS and UrQMD models., Comment: v2: Minor text changes, Fig. 10 updated, version published in Eur. Phys. J. C

Published
2017

3. Production of Λ-hyperons in inelastic p+p interactions at 158 GeV/c

Author

NA61/SHINE Collaboration, Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Bogomilov, M., Brandin, A., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Cirkovic, M., Czopowicz, T., Damyanova, A., Davis, N., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Garibov, A., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A. E., Hierholzer, M., Igolkin, S., Ivashkin, A., Johnson, S. R., Kadija, K., Kapoyannis, A., Kaptur, E., Kisiel, J., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Maksiak, B., Malakhov, A. I., Manic, D., Marcinek, A., Marino, A. D., Marton, K., Mathes, H.-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Messerly, B., Mills, G. B., Morozov, S., Mrowczynski, S., Nagai, Y., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Panagiotou, A. D., Paolone, V., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiada{\l}a, M., Pulawski, S., Puzovic, J., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Röhrich, D., Rondio, E., Roth, M., Rubbia, A., Rumberger, B. T., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Schmidt, K., Sekiguchi, T., Selyuzhenkov, I., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Ströbele, H., Susa, T., Szuba, M., Tada, M., Taranenko, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., and Zimmerman, E. D.

Subjects
Physics, High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

Inclusive production of Λ -hyperons was measured with the large acceptance NA61/SHINE spectrometer at the CERN SPS in inelastic p+p interactions at beam momentum of 158 GeV/c . Spectra of transverse momentum and transverse mass as well as distributions of rapidity and x F are presented. The mean multiplicity was estimated to be 0.120±0.006(stat.)±0.010(sys.). The results are compared with previous measurements and predictions of the Epos , U r qmd and Fritiof models.

Published
2016

4. Measurements of π⁺⁻, K⁺⁻, K-S⁰, Λ and proton production in proton-carbon interactions at 31 GeV/c with the NA61/SHINE spectrometer at the CERN SPS

Author

NA61/SHINE Collaboration, Abgrall, N., Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Bluemer, J., Bogomilov, M., Brandin, A., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Czopowicz, T., Damyanova, A., Davis, N., Debieux, S., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Drozhzhova, T., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A., Hierholzer, M., Igolkin, S., Ivashkin, A., Jokovic, D., Johnson, S. R., Kadija, K., Kapoyannis, A., Kaptur, E., Kielczewska, D., Kisiel, J., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Majka, Z., Maksiak, B., Malakhov, A. I., Marchionni, A., Manic, D., Marcinek, A., Marino, A. D., Marton, K., Mathes, H.-J., Matulewicz, T., Matveev, V., Melkumov, G. L., Messerly, B., Mills, G. B., Morozov, S., Mrowczynski, S., Murphy, S., Nagai, Y., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Palczewski, T., Panagiotou, A. D., Paolone, V., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiadala-Zezula, M., Pulawski, S., Puzovic, J., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Rohrich, D., Rondio, E., Roth, M., Rubbia, A., Rumberger, B. T., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Sarnecki, R., Schmidt, K., Sekiguchi, T., Selyuzhenkov, I., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Stroebele, H., Susa, T., Szuba, M., Tada, M., Taranenko, A., Tefelska, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Yarritu, K., Zambelli, L., and Zimmerman, E. D.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Physics, High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

Measurements of hadron production in p + C interactions at 31 GeV/c are performed using the NA61/SHINE spectrometer at the CERN SPS. The analysis is based on the full set of data collected in 2009 using a graphite target with a thickness of 4 % of a nuclear interaction length. Inelastic and production cross sections as well as spectra of π ± , K ± , p, K⁰ S and Λ are measured with high precision. These measurements are essential for improved calculations of the initial neutrino fluxes in the T2K long-baseline neutrino oscillation experiment in Japan. A comparison of the NA61/SHINE measurements with predictions of several hadroproduction models is presented.

Published
2016

5. Multiplicity and transverse momentum fluctuations in inelastic proton-proton interactions at the CERN Super Proton Synchrotron

Author

Collaboration, NA61/SHINE, Aduszkiewicz, A., Ali, Y., Andronov, E., Anticic, T., Antoniou, N., Baatar, B., Bay, F., Blondel, A., Blumer, J., Bogomilov, M., Bravar, A., Brzychczyk, J., Bunyatov, S. A., Busygina, O., Christakoglou, P., Cirkovic, M., Czopowicz, T., Davis, N., Debieux, S., Dembinski, H., Deveaux, M., Diakonos, F., Di Luise, S., Dominik, W., Dumarchez, J., Dynowski, K., Engel, R., Ereditato, A., Feofilov, G. A., Fodor, Z., Garibov, A., Gazdzicki, M., Golubeva, M., Grebieszkow, K., Grzeszczuk, A., Guber, F., Haesler, A., Hasegawa, T., Herve, A., Hierholzer, M., Igolkin, S., Ivashkin, A., Kadija, K., Kapoyannis, A., Kaptur, E., Kisiel, J., Kobayashi, T., Kolesnikov, V. I., Kolev, D., Kondratiev, V. P., Korzenev, A., Kowalik, K., Kowalski, S., Koziel, M., Krasnoperov, A., Kuich, M., Kurepin, A., Larsen, D., Laszlo, A., Lewicki, M., Lyubushkin, V. V., Mackowiak-Pawlowska, M., Maksiak, B., Malakhov, A. I., Manic, D., Marcinek, A., Marton, K., Mathes, H. -J., Matulewicz, T., Matveev, V., Melkumov, G. L., Morozov, S., Mrowczynski, S., Nakadaira, T., Naskret, M., Nirkko, M., Nishikawa, K., Panagiotou, A. D., Pavin, M., Petukhov, O., Pistillo, C., Planeta, R., Popov, B. A., Posiadala, M., Pulawski, S., Puzovic, J., Rauch, W., Ravonel, M., Redij, A., Renfordt, R., Richter-Was, E., Robert, A., Rohrich, D., Rondio, E., Roth, M., Rubbia, A., Rustamov, A., Rybczynski, M., Sadovsky, A., Sakashita, K., Sarnecki, R., Schmidt, K., Sekiguchi, T., Seryakov, A., Seyboth, P., Sgalaberna, D., Shibata, M., Slodkowski, M., Staszel, P., Stefanek, G., Stepaniak, J., Strobele, H., Susa, T., Szuba, M., Tada, M., Tefelska, A., Tefelski, D., Tereshchenko, V., Tsenov, R., Turko, L., Ulrich, R., Unger, M., Vassiliou, M., Veberic, D., Vechernin, V. V., Vesztergombi, G., Vinogradov, L., Wilczek, A., Wlodarczyk, Z., Wojtaszek-Szwarc, A., Wyszynski, O., Zambelli, L., Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), NA61/SHINE, Laboratoire de Physique Nucléaire et de Hautes Énergies ( LPNHE ), Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Université Paris Diderot - Paris 7 ( UPD7 ) -Centre National de la Recherche Scientifique ( CNRS ), Blondel, Alain, Bravar, Alessandro, Debieux, Stéphane, Haesler, Alexis, Korzenev, Alexander, and Ravonel Salzgeber, Melody

Subjects
charged particle: hadroproduction, Particle physics, CERN Lab, Physics and Astronomy (miscellaneous), Hadron, Monte Carlo method, FOS: Physical sciences, ddc:500.2, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], transverse momentum fluctuations, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], multiplicity, ddc:530, [ PHYS.NEXP ] Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Multiplicity (chemistry), 010306 general physics, Nuclear Experiment, Engineering (miscellaneous), p p: inelastic scattering, Physics, fireball: energy, Large Hadron Collider, multiplicity: fluctuation, 010308 nuclear & particles physics, NUCLEUS-NUCLEUS COLLISIONS, MODEL, ENERGIES, GEV/C, Sigma, CERN SPS, proton synchrotron, Super Proton Synchrotron, transverse momentum: fluctuation, Charged particle, 3. Good health, beam: momentum, nucleon: model, NA49, numerical calculations: Monte Carlo, Nucleon, 20 GeV/c31 GeV/c40 GeV/c80 GeV/c158 GeV/c, statistical, Particle Physics - Experiment, experimental results
Abstract

Measurements of multiplicity and transverse momentum fluctuations of charged particles were performed in inelastic p+p interactions at 20, 31, 40, 80 and 158 GeV/c beam momentum. Results for the scaled variance of the multiplicity distribution and for three strongly intensive measures of multiplicity and transverse momentum fluctuations \$\Delta[P_{T},N]\$, \$\Sigma[P_{T},N]\$ and \$\Phi_{p_T}\$ are presented. For the first time the results on fluctuations are fully corrected for experimental biases. The results on multiplicity and transverse momentum fluctuations significantly deviate from expectations for the independent particle production. They also depend on charges of selected hadrons. The string-resonance Monte Carlo models EPOS and UrQMD do not describe the data. The scaled variance of multiplicity fluctuations is significantly higher in inelastic p+p interactions than in central Pb+Pb collisions measured by NA49 at the same energy per nucleon. This is in qualitative disagreement with the predictions of the Wounded Nucleon Model. Within the statistical framework the enhanced multiplicity fluctuations in inelastic p+p interactions can be interpreted as due to event-by-event fluctuations of the fireball energy and/or volume., Comment: 18 pages, 12 figures

Published
2015

6. Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sqrt(sNN)=6.3 to 17.3 GeV

Author

Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Bunčić, Predrag, Cerny, V., Christakoglou, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kliemant, M., Kniege, S., Kolesnikov, V. I., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Kresan, D., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, Vedran, Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Pikna, M., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Stefanek, G., Stock, R., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Szymanski, P., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, Danilo, Wetzler, A., Wlodarczyk, Z., and Yoo, I. K.

Subjects
NA49, SPS, fluctuation, particle ratio, energy dependence, Physics, Nuclear Experiment
Abstract

We present measurements of the energy dependence of event-by-event fluctuations in the K/pi and (p+ anti-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, sqrt(sNN), 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+anti-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

7. System-size dependence of Lambda and Xi production in nucleus-nucleus collisions at 40A and 158A GeV measured at the CERN Super Proton Synchrotron

Author

Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Beck, H., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Book, J., Botje, M., Bracinik, J., Bunčić, Predrag, Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kolesnikov, V. I., Kowalski, M., Kraus, I., Kreps, M., Laszlo, A., Lacey, R., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, Vedran, Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Peryt, W., Pikna, M., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strabel, C., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Utvic, M., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, Danilo, Wlodarczyk, Z., Wojtaszek, A., and Yoo, I. K.

Subjects
Physics, Lambda, Xi, heavy ion, QGP, SPS, CERN, system size, Nuclear Experiment
Abstract

Results on Lambda, anti-Lambda, and Xi- 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 Lambda and anti-Lambda production can be described by transport models reasonably well, these models do not agree with the Xi- measurements. However, the core-corona picture fits very well the system-size dependence of Lambda and Xi-, whereas it agrees less well with the anti-Lambda data.

Published
2009

8. Energy dependence of transverse momentum fluctuations in Pb+Pb collisions at the CERN Super Proton Synchrotron (SPS) at 20A to 158A GeV

Author

Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bunčić, Predrag, Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kikola, D, Kolesnikov, V. I., Kornas, E., Korus, R., Kowalski, M., Kreps, M., Laszlo, A., Lacey, R., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, Vedran, Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Peryt, W, Pikna, M., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strabel, C., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Trubnikov, V., Utvic, M., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, Danilo, Wlodarczyk, Z., Wojtaszek, A., and Yoo, I. K.

Subjects
NA49, SPS, QGP, fluctuation, transverse momenta, Physics, FOS: Physical sciences, High Energy Physics::Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Particle Physics - Experiment
Abstract

Results are presented on event-by-event fluctuations of transverse momenta $p_T$ in central Pb+Pb interactions at 20$A$, 30$A$, 40$A$, 80$A$, and 158$A$ GeV. The analysis was performed for charged particles at forward center-of-mass rapidity ($1.1 < y^{*}_�� < 2.6$). Three fluctuation measures were studied: the distribution of average transverse momentum - $M(p_T)$ - in the event, the $��_{p_{T}}$ fluctuation measure and two-particle transverse momentum correlations. Fluctuations of $p_T$ are small and show no significant energy dependence in the energy range of the CERN Super Proton Synchrotron. Results are compared with QCD-inspired predictions for the critical point, and with the UrQMD model. Transverse momentum fluctuations, similar to multiplicity fluctuations, do not show the increase expected for freeze-out near the critical point of QCD., Published in Phys. Rev. C

Published
2008

9. High transverse momentum hadron spectra at sqrt(sNN)=17.3 GeV in Pb+Pb and p+p collisions

Author

Alt, C., Antičić, T., Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Buncic, P., Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, K., Karev, A., Kikola, D, Kliemant, M., Kniege, S., Kolesnikov, V. I., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Laszlo, A., Lacey, R., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, V., Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Peryt, W, Pikna, M., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strabel, C., Strobele, H., Šuša, T., Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, D., Wetzler, A., Wlodarczyk, Z., Wojtaszek, A., Yoo, I. K., and Zimanyi, J.

Subjects
Physics, Nuclear Experiment, NA49, SPS, Pb+Pb, p+p, high transverse momentum, hadron
Abstract

Transverse momentum spectra up to 4.5 GeV/c around midrapidity of pi+-, p, anti-p, and K+- in Pb+Pb reactions were measured at sqrt(sNN)=17.3 GeV by the CERN-NA49 experiment. The nuclear modification factors RAA for pi+- and RCP for pi+-, p, anti-p, K+- were extracted and compared with results obtained at the BNL Relativistic Heavy Ion Collider (RHIC) at sqrt(sNN)=200 GeV. The modification factor RAA 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 RCP, in which the contribution of the Cronin effect is reduced, shows a saturation well below unity in the pi+- channel. The extracted RCP values follow the 200 GeV RHIC results closely in the available transverse momentum range, except for pi+- above 2.5 GeV/c transverse momentum. There the measured suppression is smaller than that observed at RHIC.

Published
2008

10. Pion and kaon production in central Pb plus Pb collisions at 20A and 30A GeV: evidence for the onset of deconfinement

Author

Antičić, Tome, Alt, C., Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Buncic, P., Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kikola, D, Kliemant, M., Kniege, S., Kolesnikov, V. I., Kollegger, T., Kornas, E., Kowalski, M., Kraus, I., Kreps, M., Laszlo, A., Lacey, R., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, V., Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Peryt, W, Pikna, M., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strabel, C., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, D., Wetzler, A., Wlodarczyk, Z., Wojtaszek, A., Yoo, I. K., and Zimanyi, J.

Subjects
CERN, NA49, Pb+Pb, pion, kaon, deconfinement, Physics, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
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

11. Bose-Einstein correlations of $\pi^{-}\pi^{-}$ pairs in central Pb+Pb collisions at 20A,30A,40A,80A, and 158A GeV

Author

Alt, C., Antičić, T., Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Buncic, P., Cerny, V., Christakoglou, P., Chung, P., Chvala, O., Cramer, J. G., Csato, P., Dinkelaker, P., Eckardt, V., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, K., Karev, A., Kikola, D, Kliemant, M., Kniege, S., Kolesnikov, V. I., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Laszlo, A., Lacey, R., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, V., Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Peryt, W, Pikna, M., Pluta, J., Prindle, D., Puhlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Slodkowski, M., Stefanek, G., Stock, R., Strabel, C., Strobele, H., Šuša, T., Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, D., Wetzler, A., Wlodarczyk, Z., Wojtaszek, A., Yoo, I. K., and Zimanyi, J.

Subjects
Physics, Nuclear Theory, Nuclear Physics - Experiment, SPS, pion, bose-einstein, correlations, QGP, Pb+Pb, Nuclear Experiment
Abstract

Measurements of Bose-Einstein correlations of pi-pi- 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 co-moving ``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
2007

12. Inclusive production of charged pions in p+p collisions at 158 GeV/c beam momentum

Author

Alt, C., Anticic, T., Baatar, B., Barna, D., Bartke, J., Betev, L., Biakowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Buncic, P., Cerny, V., Christakoglou, P., Chvala, O., Dinkelaker, P., Dolejsi, J., Eckardt, V., Fischer, H.G., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gazdzicki, M., Grebieszkow, K., Hohne, C., Kadija, K., Karev, A., Kliemant, M., Kniege, S., Kolesnikov, V.I., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., van Leeuwen, M., Lungwitz, B., Makariev, M., Malakhov, A.I., Mateev, M., Melkumov, G.L., Mitrovski, M., Mrowczynski, S., Palla, G., Panayotov, D., Petridis, A., Renfordt, R., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Skrzypczak, E., Stefanek, G., Stock, R., Strobele, H., Susa, T., Sziklai, J., Szymanski, P., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranic, D., Wenig, S., Wetzler, A., Wlodarczyk, Z., and Yoo, I.K.

Subjects
Physics, Energy loss, Particle physics, Large Hadron Collider, Physics and Astronomy (miscellaneous), CERN, NA49, charged pions, p+p, inclusive, Detector, FOS: Physical sciences, Invariant (physics), High Energy Physics - Experiment, symbols.namesake, High Energy Physics - Experiment (hep-ex), Pion, Phase space, Transverse momentum, symbols, Feynman diagram, High Energy Physics::Experiment, Nuclear Experiment, Engineering (miscellaneous), Particle Physics - Experiment
Abstract

New results on the production of charged pions in p+p interactions are presented. The data come from a sample of 4.8 million inelastic events obtained with the NA49 detector at the CERN SPS at 158 GeV/c beam momentum. Pions are identified by energy loss measurement in a large TPC tracking system which covers a major fraction of the production phase space. Inclusive invariant cross sections are given on a grid of nearly 300 bins per charge over intervals from 0 to 2 GeV/c in transverse momentum and from 0 to 0.85 in Feynman x. The results are compared to existing data in overlapping energy ranges., Comment: 54 pages, 54 figures, accepted for publication in EPJC

Published
2006

13. Elliptic flow of Lambda hyperons in Pb+Pb collisions at 158 AGeV

Author

Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Bunčić, Predrag, Cerny, V., Christakoglou, P., Chvala, O., Cramer, J.G., Csato, P., Dinkelaker, P., Eckardt, V., Flierl, D., Fodor, Z., Foka, P., Friese, V., Gal, J., Gazdzicki, M., Genchev, V., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Höhne, C., Kadija, Krešo, Karev, A., Kliemant, M., Kniege, S., Kolesnikov, V. I., Kornas, E., Korus, R., Kowalski, M., Kraus, Ivica, Kreps, M., Laszlo, A., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Mateev, M., Melkumov, G. L., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Nikolić, Vedran, Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Pikna, M., Prindle, D., Pühlhofer, F., Renfordt, R., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Schmitz, N., Schuster, T., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Stefanek, G., Stock, R., Strabel, C., Ströbele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Szymanski, P., Trubnikov, V., Varga, Dražen, Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranić, Danilo, Wetzler, A., Wlodarczyk, Z., Yoo, I.K., and Zimanyi, J.

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Elliptic flow, Nuclear Theory, Hyperon, Lambda, Nuclear physics, Pion, Rapidity, Impact parameter, Nuclear Experiment, Event (particle physics), CERN, NA49, elliptic flow, mid-rapidity, lambda, NA49 experiment, Nuclear Physics
Abstract

The elliptic flow of $\Lambda$ hyperons has been measured by the NA49 experiment in semi-central Pb+Pb collisions at 158A GeV. The standard method of correlating particles with an event plane has been used. Measurements of $v_2$ 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 $v_2$ for pions and protons as well as with models predictions. The elliptic flow of Λ hyperons has been measured by the NA49 experiment in semi-central Pb+Pb collisions at 158 A GeV. The standard method of correlating particles with an event plane has been used. Measurements of v 2 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 v 2 for pions and protons as well as with models predictions.

Published
2006

14. System Size and Centrality Dependence of the Balance Function in A + A Collisions at sqrt(sNN) = 17.2 GeV

Author

Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Behler, M., Betev, L., Bialkowska, H., Billmeier, A., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Brun, R., Buncic, P., Cerny, V., Christakoglou, P., Chvala, O., Cramer, J.G., Csato, P., Darmenov, N., Dimitrov, A., Dinkelaker, P., Eckardt, V., Filip, P., Flierl, D., Fodor, Z., Foka, P., Freund, P., Friese, V., Gal, J., Gazdzicki, M., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kliemant, M., Kniege, S., Kolesnikov, V. I., Kollegger, T., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A. I., Markert, C., Mateev, M., Mayes, B. W., Melkumov, G. L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Palla, G., Panagiotou, A. D., Panayotov, D., Petridis, A., Pikna, M., Pinsky, L., Puhlhofer, F., Reid, J. G., Renfordt, R., Richard, A., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Sann, H., Schmitz, N., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Stefanek, G., Stock, R., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Trainor, T. A., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranić, D., Wetzler, A., Wlodarczyk, Z., Yoo, I.K., Zaranek, J., and Zimanyi, J.

Subjects
High Energy Physics::Lattice, Physics, High Energy Physics::Phenomenology, Nuclear Theory, system size, centrality dependence, balance function, NA49, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Results are presented on event-by-event electric charge fluctuations in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV. The observed fluctuations are close to those expected for a gas of pions correlated by global charge conservation only. These fluctuations are considerably larger than those calculated for an ideal gas of deconfined quarks and gluons. The present measurements do not necessarily exclude reduced fluctuations from a quark-gluon plasma because these might be masked by contributions from resonance decays.

Published
2005

15. Electric charge fluctuations in central Pb+Pb collisions at 20, 30, 40, 80 and 158 AGeV

Author

Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Bialkowska, H., Billmeier, A., Blume, C., Boimska, B., Botje, M., Bracinik, J., Bramm, R., Brun, R., Buncic, P., Cerny, V., Christakoglou, P., Chvala, O., Cramer, J.G., Csato, P., Darmenov, N., Dimitrov, A., Dinkelaker, P., Eckardt, V., Farantatos, D., Flierl, D., Fodor, Z., Foka, P., Freund, P., Friese, V., Gal, J., Gazdzicki, M., Georgopoulos, G., Gladysz, E., Grebieszkow, K., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kliemant, M., Kniege, S., Kolesnikov, V.I., Kollegger, T., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., van Leeuwen, M., Levai, P., Litov, L., Lungwitz, B., Makariev, M., Malakhov, A.I., Markert, C., Mateev, M., Mayes, B.W., Melkumov, G. L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, S., Palla, G., Panagiotou, A.D., Panayotov, D., Petridis, A., Pikna, M., Pinsky, L., Puhlhofer, F., Reid, J.G., Renfordt, R., Richard, A., Roland, C., Roland, G., Rybczynski, M., Rybicki, A., Sandoval, A., Sann, H., Schmitz, N., Seyboth, P., Sikler, F., Sitar, B., Skrzypczak, E., Stefanek, G., Stock, R., Strobele, H., Šuša, Tatjana, Szentpetery, I., Sziklai, J., Trubnikov, V., Varga, D., Vassiliou, M., Veres, G.I., Vesztergombi, G., Vranic, D., Wetzler, A., Wlodarczyk, Z., Yoo, I. K., Zaranek, J., and Zimanyi, J.

Subjects
event-by-event, electric charge, fluctuations, Pb+Pb collisions, NA49, Physics, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment, Nuclear Physics
Abstract

Results are presented on event-by-event electric charge fluctuations in central Pb+Pb collisions at 20, 30, 40, 80 and 158 AGeV. The observed fluctuations are close to those expected for a gas of pions correlated by global charge conservation only. These fluctuations are considerably larger than those calculated for an ideal gas of deconfined quarks and gluons. The present measurements do not necessarily exclude reduced fluctuations from a quark-gluon plasma because these might be masked by contributions from resonance decays.

Published
2004

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