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

(NA49 Collaboration) Anticic, T.; Baatar, B.; Barna, D.; Bartke, J.; Beck, H.; Betev, L.; Bialkowska, H.; Blume, C.; Bogusz, M.; Boimska, B.; Book, J.; Botje, M.; Buncic, P.; Cetner, T.; Christakoglou, P.; Chung, P.; Chvala, O.; Cramer, J. G.; Eckardt, V.; Fodor, Z.; Foka, P.; Friese, V.; Gazdzicki, M.; Grebieszkow, K.; Hoehne, C.; Kadija, K.; Karev, A.; Kolesnikov, V. I.; Kollegger, T.; Kowalski, M.; Kresan, D.; Laszlo, A.; Lacey, R.; van Leeuwen, M.; Mackowiak-Pawlowska, M.; Makariev, M.; Malakhov, A. I.; Mateev, M.; Melkumov, G. L.; Mitrovski, M.; Mrowczynski, St.; Nicolic, V.; Palla, G.; Panagiotou, A. D.; Peryt, W.; Pluta, J.; Prindle, D.; Puelhofer, F.; Renfordt, R.; Roland, C.; Roland, G.; Rybczynski, M.; Rybicki, A.; Sandoval, A.; Schmitz, N.; Schuster, T.; Seyboth, P.; Sikler, F.; Skrzypczak, E.; Slodkowski, M.; Stefanek, G.; Stock, R.; Stroebele, H.; Susa, T.; Szuba, M.; Utvic, M.; Varga, D.; Vassiliou, M.; Veres, G. I.; Vesztergombi, G.; Vranic, D.; Wlodarczyk, Z.; Wojtaszek-Szwarc, A.; (2013) System-size dependence of particle-ratio fluctuations in Pb+Pb collisions at 158A GeV. Physical Review C, 87 (2). 024902/1-024902/9. ISSN 0556-2813

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Abstract

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

Item Type:	Article
Uncontrolled Keywords:	NA49; SPS; system-size; particle-ratio; fluctuation; critical endpoint
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Division of Experimental Physics
Projects:	Project title Project leader Project code Project type Experimental physics at LHC energies (Eksperimentalna fizika na LHC energijama) Krešo Kadija 098-0982887-2878 MZOS
Depositing User:	Tome Antičić
Date Deposited:	15 Apr 2016 09:44
URI:	http://fulir.irb.hr/id/eprint/2733
DOI:	10.1103/PhysRevC.87.024902

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