Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV

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 & 71 others D. Flierl, Z. Fodor, P. Foka, V. Friese, J. Gál, M. Gazdzicki, 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, I. K. Yoo

Research output: Article

71 Citations (Scopus)

Abstract

We present measurements of the energy dependence of event-by-event fluctuations in the K/π and (p+p̄)/π 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, 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/π ratio, larger fluctuations than expected for independent particle production are found at all collision energies. The fluctuations in the (p+p̄)/π 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/π ratio fluctuations.

Original languageEnglish
Article number044910
JournalPhysical Review C - Nuclear Physics
Volume79
Issue number4
DOIs
Publication statusPublished - ápr. 1 2009

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collisions
particle production
energy
ionic collisions
pions
statistics
deviation
protons
detectors
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV. / Alt, C.; Anticic, T.; Baatar, B.; Barna, D.; Bartke, J.; Betev, L.; Białkowska, H.; Blume, C.; Boimska, B.; Botje, M.; Bracinik, J.; Bramm, R.; Bunčcić, P.; Cerny, V.; Christakoglou, P.; Chvala, O.; Cramer, J. G.; Csató, P.; Dinkelaker, P.; Eckardt, V.; Flierl, D.; Fodor, Z.; Foka, P.; Friese, V.; Gál, J.; Gazdzicki, M.; Genchev, V.; Georgopoulos, G.; Gładysz, E.; Grebieszkow, K.; Hegyi, S.; Höhne, C.; Kadija, K.; Karev, A.; Kliemant, M.; Kniege, S.; Kolesnikov, V. I.; Kornas, E.; Korus, R.; Kowalski, M.; Kraus, I.; Kreps, M.; Kresan, D.; Van Leeuwen, M.; Lévai, P.; Litov, L.; Lungwitz, B.; Makariev, M.; Malakhov, A. I.; Mateev, M.; Melkumov, G. L.; Mischke, A.; Mitrovski, M.; Molnár, J.; Mrówczyński, St; Nicolic, V.; Pálla, G.; Panagiotou, A. D.; Panayotov, D.; Petridis, A.; Pikna, M.; Prindle, D.; Pühlhofer, F.; Renfordt, R.; Roland, C.; Roland, G.; Rybczyński, M.; Rybicki, A.; Sandoval, A.; Schmitz, N.; Schuster, T.; Seyboth, P.; Siklér, F.; Sitar, B.; Skrzypczak, E.; Stefanek, G.; Stock, R.; Ströbele, H.; Susa, T.; Szentpétery, I.; Sziklai, J.; Szymanski, P.; Trubnikov, V.; Varga, D.; Vassiliou, M.; Veres, G. I.; Vesztergombi, G.; Vranić, D.; Wetzler, A.; Włodarczyk, Z.; Yoo, I. K.

In: Physical Review C - Nuclear Physics, Vol. 79, No. 4, 044910, 01.04.2009.

Research output: Article

Alt, C, Anticic, T, Baatar, B, Barna, D, Bartke, J, Betev, L, Białkowska, H, Blume, C, Boimska, B, Botje, M, Bracinik, J, Bramm, R, Bunčcić, P, Cerny, V, Christakoglou, P, Chvala, O, Cramer, JG, Csató, P, Dinkelaker, P, Eckardt, V, Flierl, D, Fodor, Z, Foka, P, Friese, V, Gál, J, Gazdzicki, M, Genchev, V, Georgopoulos, G, Gładysz, E, Grebieszkow, K, Hegyi, S, Höhne, C, Kadija, K, Karev, A, Kliemant, M, Kniege, S, Kolesnikov, VI, Kornas, E, Korus, R, Kowalski, M, Kraus, I, Kreps, M, Kresan, D, Van Leeuwen, M, Lévai, P, Litov, L, Lungwitz, B, Makariev, M, Malakhov, AI, Mateev, M, Melkumov, GL, Mischke, A, Mitrovski, M, Molnár, J, Mrówczyński, S, Nicolic, V, Pálla, G, Panagiotou, AD, Panayotov, D, Petridis, A, Pikna, M, Prindle, D, Pühlhofer, F, Renfordt, R, Roland, C, Roland, G, Rybczyński, M, Rybicki, A, Sandoval, A, Schmitz, N, Schuster, T, Seyboth, P, Siklér, F, Sitar, B, Skrzypczak, E, Stefanek, G, Stock, R, Ströbele, H, Susa, T, Szentpétery, I, Sziklai, J, Szymanski, P, Trubnikov, V, Varga, D, Vassiliou, M, Veres, GI, Vesztergombi, G, Vranić, D, Wetzler, A, Włodarczyk, Z & Yoo, IK 2009, 'Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV' Physical Review C - Nuclear Physics, vol. 79, no. 4, 044910. https://doi.org/10.1103/PhysRevC.79.044910
Alt, C. ; Anticic, T. ; Baatar, B. ; Barna, D. ; Bartke, J. ; Betev, L. ; Białkowska, H. ; Blume, C. ; Boimska, B. ; Botje, M. ; Bracinik, J. ; Bramm, R. ; Bunčcić, P. ; Cerny, V. ; Christakoglou, P. ; Chvala, O. ; Cramer, J. G. ; Csató, P. ; Dinkelaker, P. ; Eckardt, V. ; Flierl, D. ; Fodor, Z. ; Foka, P. ; Friese, V. ; Gál, J. ; Gazdzicki, M. ; Genchev, V. ; Georgopoulos, G. ; Gładysz, E. ; Grebieszkow, K. ; Hegyi, S. ; Höhne, C. ; Kadija, K. ; Karev, A. ; Kliemant, M. ; Kniege, S. ; Kolesnikov, V. I. ; Kornas, E. ; Korus, R. ; Kowalski, M. ; Kraus, I. ; Kreps, M. ; Kresan, D. ; Van Leeuwen, M. ; Lévai, P. ; Litov, L. ; Lungwitz, B. ; Makariev, M. ; Malakhov, A. I. ; Mateev, M. ; Melkumov, G. L. ; Mischke, A. ; Mitrovski, M. ; Molnár, J. ; Mrówczyński, St ; Nicolic, V. ; Pálla, G. ; Panagiotou, A. D. ; Panayotov, D. ; Petridis, A. ; Pikna, M. ; Prindle, D. ; Pühlhofer, F. ; Renfordt, R. ; Roland, C. ; Roland, G. ; Rybczyński, M. ; Rybicki, A. ; Sandoval, A. ; Schmitz, N. ; Schuster, T. ; Seyboth, P. ; Siklér, F. ; Sitar, B. ; Skrzypczak, E. ; Stefanek, G. ; Stock, R. ; Ströbele, H. ; Susa, T. ; Szentpétery, I. ; Sziklai, J. ; Szymanski, P. ; Trubnikov, V. ; Varga, D. ; Vassiliou, M. ; Veres, G. I. ; Vesztergombi, G. ; Vranić, D. ; Wetzler, A. ; Włodarczyk, Z. ; Yoo, I. K. / Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV. In: Physical Review C - Nuclear Physics. 2009 ; Vol. 79, No. 4.
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title = "Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV",
abstract = "We present measurements of the energy dependence of event-by-event fluctuations in the K/π and (p+p̄)/π 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, 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/π ratio, larger fluctuations than expected for independent particle production are found at all collision energies. The fluctuations in the (p+p̄)/π 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/π ratio fluctuations.",
author = "C. Alt and T. Anticic and B. Baatar and D. Barna and J. Bartke and L. Betev and H. Białkowska and C. Blume and B. Boimska and M. Botje and J. Bracinik and R. Bramm and P. Bunčcić and V. Cerny and P. Christakoglou and O. Chvala and Cramer, {J. G.} and P. Csat{\'o} and P. Dinkelaker and V. Eckardt and D. Flierl and Z. Fodor and P. Foka and V. Friese and J. G{\'a}l and M. Gazdzicki and V. Genchev and G. Georgopoulos and E. Gładysz and K. Grebieszkow and S. Hegyi and C. H{\"o}hne and K. Kadija and A. Karev and M. Kliemant and S. Kniege and Kolesnikov, {V. I.} and E. Kornas and R. Korus and M. Kowalski and I. Kraus and M. Kreps and D. Kresan and {Van Leeuwen}, M. and P. L{\'e}vai and L. Litov and B. Lungwitz and M. Makariev and Malakhov, {A. I.} and M. Mateev and Melkumov, {G. L.} and A. Mischke and M. Mitrovski and J. Moln{\'a}r and St Mr{\'o}wczyński and V. Nicolic and G. P{\'a}lla and Panagiotou, {A. D.} and D. Panayotov and A. Petridis and M. Pikna and D. Prindle and F. P{\"u}hlhofer and R. Renfordt and C. Roland and G. Roland and M. Rybczyński and A. Rybicki and A. Sandoval and N. Schmitz and T. Schuster and P. Seyboth and F. Sikl{\'e}r and B. Sitar and E. Skrzypczak and G. Stefanek and R. Stock and H. Str{\"o}bele and T. Susa and I. Szentp{\'e}tery and J. Sziklai and P. Szymanski and V. Trubnikov and D. Varga and M. Vassiliou and Veres, {G. I.} and G. Vesztergombi and D. Vranić and A. Wetzler and Z. Włodarczyk and Yoo, {I. K.}",
year = "2009",
month = "4",
day = "1",
doi = "10.1103/PhysRevC.79.044910",
language = "English",
volume = "79",
journal = "Physical Review C - Nuclear Physics",
issn = "0556-2813",
publisher = "American Physical Society",
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TY - JOUR

T1 - Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from sNN=6.3 to 17.3 GeV

AU - Alt, C.

AU - Anticic, T.

AU - Baatar, B.

AU - Barna, D.

AU - Bartke, J.

AU - Betev, L.

AU - Białkowska, H.

AU - Blume, C.

AU - Boimska, B.

AU - Botje, M.

AU - Bracinik, J.

AU - Bramm, R.

AU - Bunčcić, P.

AU - Cerny, V.

AU - Christakoglou, P.

AU - Chvala, O.

AU - Cramer, J. G.

AU - Csató, P.

AU - Dinkelaker, P.

AU - Eckardt, V.

AU - Flierl, D.

AU - Fodor, Z.

AU - Foka, P.

AU - Friese, V.

AU - Gál, J.

AU - Gazdzicki, M.

AU - Genchev, V.

AU - Georgopoulos, G.

AU - Gładysz, E.

AU - Grebieszkow, K.

AU - Hegyi, S.

AU - Höhne, C.

AU - Kadija, K.

AU - Karev, A.

AU - Kliemant, M.

AU - Kniege, S.

AU - Kolesnikov, V. I.

AU - Kornas, E.

AU - Korus, R.

AU - Kowalski, M.

AU - Kraus, I.

AU - Kreps, M.

AU - Kresan, D.

AU - Van Leeuwen, M.

AU - Lévai, P.

AU - Litov, L.

AU - Lungwitz, B.

AU - Makariev, M.

AU - Malakhov, A. I.

AU - Mateev, M.

AU - Melkumov, G. L.

AU - Mischke, A.

AU - Mitrovski, M.

AU - Molnár, J.

AU - Mrówczyński, St

AU - Nicolic, V.

AU - Pálla, G.

AU - Panagiotou, A. D.

AU - Panayotov, D.

AU - Petridis, A.

AU - Pikna, M.

AU - Prindle, D.

AU - Pühlhofer, F.

AU - Renfordt, R.

AU - Roland, C.

AU - Roland, G.

AU - Rybczyński, M.

AU - Rybicki, A.

AU - Sandoval, A.

AU - Schmitz, N.

AU - Schuster, T.

AU - Seyboth, P.

AU - Siklér, F.

AU - Sitar, B.

AU - Skrzypczak, E.

AU - Stefanek, G.

AU - Stock, R.

AU - Ströbele, H.

AU - Susa, T.

AU - Szentpétery, I.

AU - Sziklai, J.

AU - Szymanski, P.

AU - Trubnikov, V.

AU - Varga, D.

AU - Vassiliou, M.

AU - Veres, G. I.

AU - Vesztergombi, G.

AU - Vranić, D.

AU - Wetzler, A.

AU - Włodarczyk, Z.

AU - Yoo, I. K.

PY - 2009/4/1

Y1 - 2009/4/1

N2 - We present measurements of the energy dependence of event-by-event fluctuations in the K/π and (p+p̄)/π 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, 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/π ratio, larger fluctuations than expected for independent particle production are found at all collision energies. The fluctuations in the (p+p̄)/π 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/π ratio fluctuations.

AB - We present measurements of the energy dependence of event-by-event fluctuations in the K/π and (p+p̄)/π 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, 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/π ratio, larger fluctuations than expected for independent particle production are found at all collision energies. The fluctuations in the (p+p̄)/π 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/π ratio fluctuations.

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U2 - 10.1103/PhysRevC.79.044910

DO - 10.1103/PhysRevC.79.044910

M3 - Article

VL - 79

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

IS - 4

M1 - 044910

ER -