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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 1, p.12-19
https://doi.org/10.15407/ujpe62.01.0012    Paper

Bari W.1, Rather N.A.2

1 Department of Physics, University of Kashmir
(Srinagar, India – 190 006; e-mail: wbari@kashmiruniversity.ac.in)
2 Department of Mathematics, University of Kashmir
(Srinagar, India – 190 006)

Sensitivity of Multiplicity Fluctuations to Rapidity in High-Energy Nucleus-Nucleus Interactions

Section: Nuclei and Nuclear Reactions
Original Author's Text: English

Abstract:  The multiplicity fluctuations in the relativistic charged particles produced in 28Si-nucleus interactions at two different energies are investigated in terms of a scaled variance. The main binning condition used in the present study is to expand the range of pseudorapidity along both sides of a central rapidity which is obtained from the rapidity distribution of each interaction considered. The dependence of the multiplicity fluctuations on the projectile energy and target size is investigated, and the results are compared with those obtained from the FRITIOF model.

Key words:  multiplicity, scaled variance, fluctuations, correlations.

References:

  1. U. Heinz. Towards the little bang standard model. J. Phys.: Conf. Ser. 455, 012044 (2013).
     CrossRef
  2. Y. Aoki, Z. Fodor, S.D. Katz, K.K. Szabo. The QCD transition temperature: results with physical masses in the continuum limit. Phys. Lett. B 643, 46 (2006);
     CrossRef  
    Y. Aoki, Sz. Borsanyi, S. Durr, Z. Fodor, S.D. Katz, S. Krieg, K.K. Szabo. The QCD transition temperature: results with physical masses in the continuum limit II. JHEP 0906, 088 (2009);
     CrossRef
  3. J. Adams et al. Experimental and theoretical challenges in the search for the quark–gluon plasma: The STAR Collaboration's critical assessment of the evidence from RHIC collisions. Nucl. Phys. A 757, 102 (2005);
     CrossRef  
    K. Adcox et al. Formation of dense partonic matter in relativistic nucleus–nucleus collisions at RHIC: Experimental evaluation by the PHENIX Collaboration. Nucl. Phys. A 757, 184 (2005).
     CrossRef
  4. K. Aamodt et al. [ALICE Collaboration]. Elliptic flow of charged particles in Pb-Pb collisions at = 2.76 TeV Phys. Rev. Lett. 105, 252302 (2010).
     CrossRef
  5. B.V. Jacak, B. Muller. The exploration of hot nuclear matter. Science 337, 310 (2012).
     CrossRef
  6. R.J. Fries, V. Greco, P. Sorensen. Coalescence models for hadron formation from quark-gluon plasma. Ann. Rev. Nucl. Part. Sci. 58, 177 (2008).
     CrossRef
  7. L. Stodolsky. Temperature fluctuations in multiparticle production. Phys. Rev. Lett. 75, 1044 (1995).
     CrossRef
  8. M.A. Stephanov, K. Rajagopal, E.V. Shuryak. Signatures of the tricritical point in QCD. Phys. Rev. Lett. 81, 4816 (1998).
     CrossRef
  9. E.V. Shuryak. Event-by-event analysis of heavy ion collisions and thermodynamical fluctuations. Phys. Lett. B 423, 9 (1998).
     CrossRef
  10. N.R. Sahoo (for the STAR Collaboration). Recent results on event-by-event fluctuations from the RHIC Beam Energy Scan program in the STAR experiment. arXiv:1407.1554 [nucl-ex].
  11. G. Wilk, Z. W lodarczyk. Consequences of temperature fluctuations in observables measured in high-energy collisions. Eur. Phys. Jour. A 48, 161 (2012).
     CrossRef
  12. S. Borsanyi et al. Fluctuations of conserved charges at finite temperature from lattice QCD. JHEP 1201, 138 (2012).
     CrossRef
  13. S. Ejiri, F. Karsch, K. Redlich. Hadronic fluctuations at the QCD phase transition. Phys. Lett. B 633, 275 (2006).
     CrossRef
  14. S. Gavin, G. Moschelli. Fluctuation probes of early-time correlations in nuclear collisions. Phys. Rev. C 85, 014905 (2012).
     CrossRef
  15. M.I. Adamovich et al. Multiplicities and rapidity densities in 200 GeV 16O interactions with emulsion nuclei. Phys. Lett. B 201, 397 (1988).
     CrossRef
  16. L. Van Hove. Hadronization model for quark-gluon plasma in ultra-relativistic collisions. Z. Phys. C 27, 135 (1985);
     CrossRef  
    M. Guylassy et al. Deflagrations and detonations as a mechanism of hadron bubble growth in supercooled quark-gluon plasmas. Nucl. Phys. B 237, 477 (1984).
     CrossRef
  17. A. Bialas, R. Peschanski. Moments of rapidity distributions as a measure of short-range fluctuations in high-energy collisions. Nucl. Phys. B 273, 703 (1986);
     CrossRef  
    Intermittency in multiparticle production at high energy. Nucl. Phys. B 308, 857 (1988).
     CrossRef
  18. . R.C. Hwa, M.T. Nazirov. Intermittency in second-order phase transitions. Phys. Rev. Lett. 69, 741 (1992).
     CrossRef
  19. Z. Cao, R. Hwa. In search for signs of chaos in branching processes. Phys. Rev. Lett. 75, 1268 (1995);
     CrossRef  
    Chaotic behavior of particle production in branching processes. Phys. Rev. D 53, 6608 (1996);
     CrossRef  
    Fluctuations and entropy indices of QCD parton showers. Phys. Rev. D 54, 6674 (1996).
     CrossRef
  20. R.C. Hwa, C.B. Yang. Local multiplicity fluctuations as a signature of critical hadronization in heavy-ion collisions at TeV energies. Phys. Rev. C 85, 044914 (2012).
     CrossRef
  21. B. Zhang, C.M. Ko, B.A. Li, Z.W. Lin. Multiphase transport model for relativistic nuclear collisions. Phys. Rev. C 61, 067901 (2000).
     CrossRef
  22. Z.-W. Lin, C.M. Ko, B.-A. Li, B. Zhang, S. Pal. Multiphase transport model for relativistic heavy ion collisions. Phys. Rev. C 72, 064901 (2005).
     CrossRef
  23. W. Ochs. Multidimensional intermittency analysis. Z. Phys. C 50, 339 (1991).
     CrossRef
  24. M. Ga’zdzicki, M.I. Gorenstein, S. Mr’owczy’nski. Fluctuations and deconfinement phase transition in nucleus–nucleus collisions. Phys. Lett. B 585, 115 (2004)].
     CrossRef
  25. M.A. Stephanov, K. Rajagopal, E.V. Shuryak. Event-byevent fluctuations in heavy ion collisions and the QCD critical point. Phys. Rev. D 60, 114028 (1999).
     CrossRef
  26. C. Alt et al. (NA49 Collaboration). Energy dependence of meson production in central Pb + Pb collisions at = 6 to 17 GeV. Phys. Rev. C 78, 044907 (2008).
     CrossRef
  27. M. Daugherity et al. (STAR Collaboration). J. Phys. G 35, 104090 (2008).
     CrossRef
  28. C. Alt et al. (NA49 Collaboration). Energy dependence of particle ratio fluctuations in central Pb + Pb collisions from = 6.3 to 17.3 GeV. Phys. Rev. C 79, 044910 (2008).
     CrossRef
  29. D. Ghosh et al. Rapidity dependence of multiplicity fluctuations and correlations in high-energy nucleus–nucleus interactions. Pramana J. Phys. 77, 297 (2011).
     CrossRef
  30. B. Andersson, G. Gustafson, B. Nilsson-Almqvist. A model for low- hadronic reactions with generalizations to hadron-nucleus and nucleus-nucleus collisions. Nucl. Phys. B 281, 289 (1987);
     CrossRef   
    B. Nilsson-Almquist, E. Stenlund. Interactions between hadrons and nuclei: The Lund Monte-Carlo – FRITIOF version 1.6. Comp. Phys. Comm. 43, 387 (1987).
     CrossRef
  31. . A. Shakeel et al. Cluster production in 14.5 GeV/ Sinucleus collisions. Int. J. Mod. Phys. E 08, 121 (1999).
     CrossRef
  32. W. Bari et al. Intermittency in 4.5 and 14.5 GeV/ 28Sinucleus interactions. Int. J. Mod. Phys. E 11, 131 (2002).
     CrossRef
  33. C.F. Powell, P.H. Fowler, D.H. Perkins. The Study of Elementary Particles by the Photographic Method (Pergamon Press, 1959).
  34. R.A. Fini (ALICE Collaboration). Multiplicity of charged particles in relativistic heavy-ion interactions. Nucl. Phys. A 749, 325 (2005).
     CrossRef
  35. B. Lungwitz (NA49 Collaboration). Energy, rapidity and transverse momentum dependence of multiplicity fluctuations in heavy ion collisions at CERN SPS. arXiv:0709.1646v2 [nucl-ex] (2007).