/ Experiment-Nucl arXiv:1204.2130

System size dependence of particle-ratio fluctuations in Pb+Pb collisions at 158$A$ GeV

Anticic, T. (Boskovic Inst., Zagreb) ; Baatar, B. (Dubna, JINR) ; Barna, D. (Hungarian Acad. Sci., Budapest) ; Bartke, J. (Cracow, INP) ; Beck, H. (Hamburg U., Dept. Math.) ; Betev, L. (CERN) ; Bialkowska, H. (Warsaw, Inst. Nucl. Studies) ; Blume, C. (Hamburg U., Dept. Math.) ; Bogusz, M. (Warsaw U. of Tech.) ; Boimska, B. (Warsaw, Inst. Nucl. Studies) ; Book, J. (Hamburg U., Dept. Math.) ; Botje, M. (NIKHEF, Amsterdam) ; Buncic, P. (CERN) ; Cetner, T. (Warsaw U. of Tech.) ; Christakoglou, P. (NIKHEF, Amsterdam) ; Chung, P. (SUNY, Stony Brook) ; Chvala, O. (Charles U.) ; Cramer, J.G. (Washington U., Seattle) ; Eckardt, V. (Munich, Max Planck Inst.) ; Fodor, Z. (Hungarian Acad. Sci., Budapest) ; Foka, P. (Darmstadt, GSI) ; Friese, V. (Darmstadt, GSI) ; Gazdzicki, M. (Jan Kochanowski U.) ; Grebieszkow, K. (Warsaw U. of Tech.) ; Hohne, C. (Darmstadt, GSI) ; Kadija, K. (Boskovic Inst., Zagreb) ; Karev, A. (CERN) ; Kolesnikov, V.I. (Dubna, JINR) ; Kollegger, T. (Hamburg U., Dept. Math.) ; Kowalski, M. (Cracow, INP) ; Kresan, D. (Darmstadt, GSI) ; Laszlo, A. (Hungarian Acad. Sci., Budapest) ; Lacey, R. (SUNY, Stony Brook) ; van Leeuwen, M. (NIKHEF, Amsterdam) ; Mackowiak-Pawlowska, M. (Warsaw U. of Tech.) ; Makariev, M. (Sofiya, Inst. Nucl. Res.) ; Malakhov, A.I. (Dubna, JINR) ; Mateev, M. (Sofiya U.) ; Melkumov, G.L. (Dubna, JINR) ; Mitrovski, M. (Hamburg U., Dept. Math.) ; Mrowczynski, St. (Jan Kochanowski U.) ; Nicolic, V. (Boskovic Inst., Zagreb) ; Palla, G. (Hungarian Acad. Sci., Budapest) ; Panagiotou, A.D. (Athens U.) ; Peryt, W. (Warsaw U. of Tech.) ; Pluta, J. (Warsaw U. of Tech.) ; Prindle, D. (Washington U., Seattle) ; Puhlhofer, F. (Hamburg U., Dept. Math.) ; Renfordt, R. (Hamburg U., Dept. Math.) ; Roland, C. (MIT) ; Roland, G. (MIT) ; Rybczynski, M. (Jan Kochanowski U.) ; Rybicki, A. (Cracow, INP) ; Sandoval, A. (Darmstadt, GSI) ; Schmitz, N. (Munich, Max Planck Inst.) ; Schuster, T. (Hamburg U., Dept. Math.) ; Seyboth, P. (Munich, Max Planck Inst.) ; Sikler, F. (Hungarian Acad. Sci., Budapest) ; Skrzypczak, E. (Warsaw U.) ; Slodkowski, M. (Warsaw U. of Tech.) ; Stefanek, G. (Jan Kochanowski U.) ; Stock, R. (Hamburg U., Dept. Math.) ; Strobele, H. (Hamburg U., Dept. Math.) ; Susa, T. (Boskovic Inst., Zagreb) ; Szuba, M. (Warsaw U. of Tech.) ; Utvic, M. (Hamburg U., Dept. Math.) ; Varga, D. (Eotvos U.) ; Vassiliou, M. (Athens U.) ; Veres, G.I. (Hungarian Acad. Sci., Budapest) ; Vesztergombi, G. (Hungarian Acad. Sci., Budapest) ; Vranic, D. (Darmstadt, GSI) ; Wlodarczyk, Z. (Jan Kochanowski U.) ; Wojtaszek-Szwarc, A. (Jan Kochanowski U.)

Abstract: New measurements by the NA49 experiment of the centrality dependence of event-by-event fluctuations of the particle yield ratios (K$^{+}$+K$^{-}$)/($\pi^{+}+\pi^{-}$), (p+$\bar{\text p}$)/($\pi^{+}+\pi^{-}$), and (K$^{+}$+K$^{-}$)/(p+$\bar{\text p}$) are presented for Pb+Pb collisions at 158$A$ GeV. The absolute values of the dynamical fluctuations of these ratios, quantified by the measure $\sigma_{\text{dyn}}$, increase by about a factor of two from central to semi-peripheral collisions. Multiplicity scaling scenarios are tested and found to apply for both the centrality and the previously published energy dependence of the (K$^{+}$+K$^{-}$)/($\pi^{+}+\pi^{-}$) and (p+$\bar{\text p}$)/($\pi^{+}+\pi^{-}$) ratio fluctuations. A description of the centrality and energy dependence of (K$^{+}$+K$^{-}$)/(p+$\bar{\text p}$) ratio fluctuations by a common scaling prescription is not possible since there is a sign change in the energy dependence.

Web-Page: http://inspirehep.net/record/1107924/files/arXiv:1204.2130.pdf; http://inspirehep.net/record/1107924/files/fig1.png; http://inspirehep.net/record/1107924/files/fig2.png; http://inspirehep.net/record/1107924/files/fig3.png; http://inspirehep.net/record/1107924/files/fig4a.png; http://inspirehep.net/record/1107924/files/fig4b.png; http://inspirehep.net/record/1107924/files/fig4c.png; http://inspirehep.net/record/1107924/files/fig4d.png; http://inspirehep.net/record/1107924/files/fig4e.png; http://inspirehep.net/record/1107924/files/fig4f.png; http://inspirehep.net/record/1107924/files/fig5a.png; http://inspirehep.net/record/1107924/files/fig5b.png; http://inspirehep.net/record/1107924/files/fig5c.png; http://inspirehep.net/record/1107924/files/fig6a.png; http://inspirehep.net/record/1107924/files/fig6b.png; http://inspirehep.net/record/1107924/files/fig6c.png; http://inspirehep.net/record/1107924/files/fig7a.png; http://inspirehep.net/record/1107924/files/fig7b.png; http://inspirehep.net/record/1107924/files/fig7c.png; http://inspirehep.net/record/1107924/files/fig8.png; http://inspirehep.net/record/1107924/files/fig9.png

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