Abstract
The study of the scaled factorial moments of the multiplicity distribution in rapidity intervals as function of the rapidity interval size is presented for Au + Au interactions at √sNN = 7.7 and 11.5 GeV using the HYDJET++, UrQMD and vHLLE+UrQMD generators. This measurement is sensitive to the size and power of the multiparticle correlations. The sensitivity of the measurement to the initial conditions and properties of nuclear matter equation of state is discussed.
Similar content being viewed by others
REFERENCES
Y. Aoki, G. Endrodi, Z. Fodor, S. D. Katz, and K. K. Szabo, “The order of the quantum chromodynamics transition predicted by the standard model of particle physics,” Nature 443, 675 (2006).
S. Borsanyi, G. Endrodi, Z. Fodor, A. Jakovac, S. D. Katz, S. Krieg, C. Ratti, and K. K. Szabo, “The QCD equation of state with dynamical quarks,” JHEP, No. 11, 077 (2010).
M. A. Stephanov, “QCD phase diagram and the critical point,” Prog. Theor. Phys. Suppl. 153, 139 (2004).
M. Hippert and E. S. Fraga, “Multiplicity fluctuations near the QCD critical point,” Phys. Rev. D: Part. Fields 96, 034011 (2017).
X. Luo, “Exploring the QCD phase structure with beam energy scan in heavy-ion collisions,” Nucl. Phys. A 956, 75 (2016).
J. Xu (STAR Collab.), “Energy dependence of moments of net-proton, net-kaon, and net-charge multiplicity distributions at STAR,” J. Phys.: Conf. Ser. 736, 012002 (2016).
M. A. Stephanov, K. Rajagopal, and E. V. Shuryak, “Event-by-event fluctuations in heavy ion collisions and the QCD critical point,” Phys. Rev. D: Part. Fields 60, 114 028 (1999).
M. Hippert, E. S. Fraga, and E. M. Santos, “Critical versus spurious fluctuations in the search for the QCD critical point,” Phys. Rev. D: Part. Fields 93, 014029 (2016).
M. Gorenstein, “New theoretical results on event-by-event fluctuations,” Proc. Sci. CPOD 2014, 017 (2015).
Kh. U. Abraamyan et al. (MPD Collab.), “The MPD detector at the NICA heavy-ion collider at JINR,” Nucl. Instrum. Methods Phys. Res., Sect. A 628, 99 (2011).
S. A. Bass, M. Belkacem, M. Bleicher, M. Brandstetter, L. Bravina, C. Ernst, L. Gerland, M. Hofmann, et al., “Miscroscopic models of ultrarelativistic heavy ion collisions,” Prog. Part. Nucl. Phys. 41, 255 (1998).
Iu. Karpenko, P. Huovinen, H. Petersen, and M. Bleicher, “Estimation of the shear viscosity at finite net-baryon density from A+A collision data at √s = 7.7–200 GeV,” Phys. Rev. C 91, 064901 (2015).
I. P. Lokhtin, L. V. Malinina, S. V. Petrushanko, A. M. Snigirev, I. Arsene, and K. Tywonyuk, “Heavy ion event generator HYDJET++,” Comput. Phys. Commun. 180, 779 (2009).
P. F. Kolb, J. Sollfrank, and U. W. Heinz, “Anisotropic transverse flow and the quark hadron phase transition,” Phys. Rev. C 62, 054 909 (2000).
J. Steinheimer et al., “An effective chiral hadron-quark equation of state,” J. Geom. Phys. 38, 035001 (2011).
A. Bialas and R. Peschanski, “Moments of rapidity distributions as a measure of short-range fluctuations in high-energy collisions,” Nucl. Phys. B 273, 703 (1986).
N. G. Antoniou et al. (NA49 Collab.), “Improved intermittency analysis of proton density fluctuations in NA49 ion collisions at 158 AGeV,” EPJ Web Conf. 71, 00035 (2014).
M. M. Khan et al., “Improved intermittency analysis of charged particle density fluctuations in Pb+Pb collisions at√sNN = 2.76 TeV,” DAE-BRNS. Symp. Nucl. Phys. 61, 840–841 (2016).
N. Davis (NA61/SHINE Collab.), “Searching for the critical point of strongly interacting matter in nucleus-nucleus collisions at CERN SPS,” arXiv:2002.06636 (2020).
M. Yu. Bogolyubsky et al., “Clan model and factorial moments of the multiplicity distribution in intervals,” Phys. Atom. Nucl. 57, 2132 (1994).
M. Yu. Bogolyubsky et al., “Characteristics of the groups of charged particles in p, pp and K – p interactions at 32 GeV/c,” Phys. Atom. Nucl. 58, 1877 (1995).
Funding
This work was supported by grant no. 18-02-40044 from the Russian Foundation for Basic Research.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Kodolova, O., Cheremnova, M., Lokhtin, I. et al. Factorial Moments in the NICA/MPD Experiment. Phys. Part. Nuclei 52, 658–662 (2021). https://doi.org/10.1134/S106377962104033X
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S106377962104033X