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12 results on '"Gladysz E"'

1. 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

2. Energy dependence of phi meson production in central Pb+Pb collisions sqrt(sNN) = 6 to 17 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., 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, Krešo, Karev, A., Kikola, D., Kliemant, M., Kniege, S., Kolesnikov, V. I., Kollegger, T., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Kresan, D., 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, St., 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, Danilo, Wetzler, A., Wlodarczyk, Z., Yoo, I. K., and Zimanyi, J.

Subjects
CERN, SPS, QGP, Pb+Pb, strange particle, phi, energy dependence, Physics, High Energy Physics::Experiment, Nuclear Experiment
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

3. Energy dependence of Lambda and Xi production in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV measured at the CERN Super Proton Synchrotron

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., 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., 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., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Mrowczynski, St., 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, T., Szentpetery, I., Sziklai, J., Szuba, M., Szymanski, P., Trubnikov, V., Utvic, M., Varga, D., Vassiliou, M., Veres, G. I., Vesztergombi, G., Vranić, Danilo, Wetzler, A., Wlodarczyk, Z., Wojtaszek, A., Yoo, I. K., and Zimanyi, J.

Subjects
CERN, SPS, QGP, Pb+Pb, strange particle, Lambda, Xi, energy dependence, Physics, Nuclear Theory, Nuclear Experiment
Abstract

Results on Lambda, anti-Lambda, Xi-, and antiXi+ 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- and anti-Xi+ multiplicities.

Published
2008

4. Energy dependence of multiplicity fluctuations in heavy ion collisions at 20A to 158A 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., 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, Krešo, 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, St., 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, Wetzler, A., Wlodarczyk, Z., Wojtaszek, A., Yoo, I. K., and Zimanyi, J.

Subjects
Physics, NA49, CERN, SPS, QGP, fluctuations, multiplicity, energy dependence, Nuclear Experiment
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 omega 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

5. 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

6. 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

7. Lambda and Antiambda production in central Pb-Pb collisions at 40, 80, and 158A GeV

Author

Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Behler, M., Betev, L., Bialkowska, H., Billimeier, 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., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kolesnikov, V.I., Kollegger, T., Kornas, E., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Levai, P., Litov, L., Makariev, M., Malakhov, A.I., Markert, C., Mateev, M., Mayes, B.W., Melkumov, G.L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Palla, G., Panagiotou, A.D., Panayotov, D., Perl, K., Petridis, A., Pikna, M., Pinsky, L., Puhlhofer, F., Reid, J.G., Renfordt, R., Retyk, W., 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, Danilo, Wetzler, A., Wlodarczyk, Z., Yoo, I.K., Zaranek, J., and Zimanyi, J.

Subjects
Physics, lambda, antilambda, strange particle, production, Pb+Pb collsions, NA49, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and 158 A GeV beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The Lambda/pi ratio at mid-rapidity and in full phase space shows a pronounced maximum between the highest AGS and 40 A GeV SPS energies, whereas the Antilambda/pi ratio exhibits a monotonic increase.

Published
2004

8. Evidence for an Exotic S = -2, Q = -2 Baryon Resonance in Proton-Proton Collisions at the CERN SPS

Author

Alt, C., Antičić, Tome, Baatar, B., Barna, D., Bartke, J., Betev, L., Biakowska, H., Billimeier, 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, G., Filip, P., Flierl, D., Fodor, Z., Foka, P., Freund, P., Friese, V., Gal, J., Gazdzicki, M., Georgopoulos, G., Gladysz, E., Hegyi, S., Hohne, C., Kadija, Krešo, Karev, A., Kniege, S., Kolesnikov, V.I., Kollegger, T., Korus, R., Kowalski, M., Kraus, I., Kreps, M., Levai, P., Litov, L., Makariev, M., Malakhov, A.I., Markert, C., Mateev, M., Mayes, B.W., Melkumov, G.L., Meurer, C., Mischke, A., Mitrovski, M., Molnar, J., Palla, G., Panagiotou, A.D., Panayotov, D., Perl, K., Petridis, A., Pikna, M., Pinsky, L., Puhlhofer, F., Reid, J.G., Renfordt, R., Retyk, W., 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., Vranic, D., Wetzler, A., Wodarczyk, Z., Yoo, I.K., Zaranek, J., and Zimanyi, J.

Subjects
Physics, High Energy Physics::Phenomenology, exotic, pentaquark, NA49, p+p, Nuclear Theory, High Energy Physics::Experiment, Nuclear Experiment
Abstract

Results of resonance searches in the Xi-pi-, Xi-pi+, bar{; ; ; ; Xi}; ; ; ; +pi-, and bar{; ; ; ; Xi}; ; ; ; +pi+ invariant mass spectra in proton-proton collisions at sqrt{; ; ; ; s}; ; ; ; = 17.2 GeV are presented. Evidence is shown for the existence of a narrow Xi-pi- baryon resonance with mass of 1.862± ; ; 0.002 GeV/c2 and width below the detector resolution of about 0.018 GeV/c2. The significance is estimated to be above 4.2. This state is a candidate for the hypothetical exotic Xi^{; ; ; ; --}; ; ; ; _{; ; ; ; ; ; 3/2}; ; ; ; baryon with S = -2, I = 3/2, and a quark content of (dsds\bar{; ; ; ; u}; ; ; ; ). At the same mass, a peak is observed in the \Xi^{; ; ; ; -}; ; ; ; \pi^{; ; ; ; +}; ; ; ; spectrum which is a candidate for the \Xi^{; ; ; ; 0}; ; ; ; _{; ; ; ; 3/2}; ; ; ; member of this isospin quartet with a quark content of (dsus\bar{; ; ; ; d}; ; ; ; ). The corresponding antibaryon spectra also show enhancements at the same invariant mass.

Published
2004

9. Event-by-event fluctuations of the Kaon-to-Pion ratio in central Pb+Pb collisions at 158 GeV per nucleon.

Author

Afanasiev SV, Anticic T, Bächler J, Barna D, Barnby LS, Bartke J, Barton RA, Betev L, Bialkowska H, Billmeier A, Blume C, Blyth CO, Boimska B, Botje M, Bracinik J, Brady FP, Bramm R, Brun R, Buncic P, Carr L, Cebra D, Cooper GE, Cramer JG, Csató P, Eckardt V, Eckhardt F, Ferenc D, Filip P, Fischer HG, Fodor Z, Foka P, Freund P, Friese V, Ftacnik J, Gál J, Gazdzicki M, Georgopoulos G, Gladysz E, Harris JW, Hegyi S, Hlinka V, Höhne C, Igo G, Ivanov M, Jacobs P, Janik R, Jones PG, Kadija K, Kolesnikov VI, Kollegger T, Kowalski M, Lasiuk B, van Leeuwen M, Lévai P, Malakhov AI, Margetis S, Markert C, Mayes BW, Melkumov GL, Mischke A, Molnár J, Nelson JM, Odyniec G, Pálla G, Panagiotou AD, Petridis A, Pikna M, Pinsky L, Poskanzer AM, Prindle DJ, Pühlhofer F, Reid JG, Renfordt R, Retyk W, Ritter HG, Röhrich D, Roland C, Roland G, Rybicki A, Sammer T, Sandoval A, Sann H, Schäfer E, Schmitz N, Seyboth P, Siklér F, Sitar B, Skrzypczak E, Snellings R, Squier GT, Stock R, Strmen P, Ströbele H, Susa T, Szarka I, Szentpétery I, Sziklai J, Toy M, Trainor TA, Trentalange S, Ullrich T, Varga D, Vassiliou M, Veres GI, Vesztergombi G, Voloshin S, Vranic D, Wang F, Weerasundara DD, Wenig S, Wetzler A, Whitten C, Xu N, Yates TA, Yoo IK, and Zimányi J

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
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10. Transverse energy production in 208Pb+Pb collisions at 158 GeV per nucleon.

Author

Alber T, Appelshäuser H, Bächler J, Bartke J, Bialkowska H, Bieser F, Bloomer MA, Blyth CO, Bock R, Bormann C, Brady FP, Brockmann R, Buncic P, Caines HL, Cebra D, Chan P, Cooper GE, Cramer JG, Cramer PB, Csato P, Derado I I, Dunn J, Eckardt V V, Eckhardt F, Euler S, Ferguson MI, Fischer HG, Fodor Z, Foka P, Freund P, Fuchs M, Gal J, Gazdzicki M, Gladysz E, Grebieszkow J, Günther J, Harris JW, Heck W, Hegyi S, Hill LA, Huang I I, Howe MA, Igo G, Irmscher D, Jacobs P, Jones PG, Kadija K, Kecskemeti J, Kowalski M, Kühmichel A, Lasiuk B, Margetis S, Mitchell JW, Mock A, Nelson JM, Odyniec G, Palinkas J, Palla G, Panagiotou AD, Petridis A, Piper A, Poskanzer AM, Prindle DJ, and Pühlhofer F

Published
1995
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11. Transverse momentum dependence of Bose-Einstein correlations in 200A GeV/cS+A collisions.

Author

Alber T, Bächler J, Bartke J, Bialkowska H, Bloomer MA, Bock R, Braithwaite WJ, Brinkmann D, Brockmann R, Buncic P, Chan P, Cramer PB, Cramer JG, Derado I I, Eckardt V V, Eschke J, Favuzzi C, Ferenc D, Fleischmann B, Foka P, Freund P, Fuchs M, Gazdzicki M, Gladysz E, Harris JW, Hoffman M, Jacobs P, Kabana S, Kadija K, Kosiec J, Kowalski M, Kühmichel A, Lahanas M, Lee JY, Ljubicic A Jr, Margetis S, Mitchell JT, Morse RJ, Nappi E, Odyniec G, Paic G, Panagiotou AD, Petridis A, Piper A, Posa F, Poskanzer AM, Pühlhofer F, Rauch W, Renfordt R, Retyk W, Röhrich D, Roland G, Rothard H, Runge K, Sandoval A, Schambach J, Schmitz N, Schmoetten E, Schneider I I, Seyboth P, Seyerlein J, Skrzypczak E, Spinelli P, and Stefansky P

Published
1995
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12. Charged particle spectra in central S+S collisions at 200 GeV/c per nucleon.

Author

Bächler J, Bartke J, Bialkowska H, Bock R, Brockmann R, Buncic P, Chase SI, Derado I I, Eckardt V V, Eschke J, Ferenc D, Fleischmann B, Foka P, Fuchs M, Gazdzicki M, Gladysz E, Harris JW, Heck W, Hoffmann M, Jacobs PM, Kabana S, Kadija K, Keidel R, Kosiec J, Kowalski M, Kühmichel A, Lahanas M, Lee JY, Ljubicic A Jr, Margetis S, Morse R, Nappi E, Odyniec G, Paic G, Panagiotu AD, Petridis A, Piper A, Posa F, Poskanzer AM, Pugh HG, Pühlhofer F, Rai G, Rauch W, Renfordt R, Röhrich D, Roland G, Rothard H, Runge K, Sandoval A, Schambach JJ, Schmitz N, Schmoetten E, Schneider I I, Seyboth P, Seyerlein J, Skrzypczak E, Stefanski P, Stock R, Ströbele H, Teitelbaum L, Tincknell ML, Tonse S, Vasileiadis G, and Vesztergombi G

Published
1994
Full Text
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