Measurement of higher cumulants of net-charge multiplicity distributions in Au+Au collisions at √s.sub.NN./sub.=7.7−200 GeV

0522568 - FZÚ 2020 RIV US eng J - Journal Article
Adare, A. - Afanasiev, S. - Aidala, C. - Mikeš, P. - Růžička, Pavel - Tomášek, Michal - Tomášek, Lukáš - Vrba, Václav … Total 512 authors
Measurement of higher cumulants of net-charge multiplicity distributions in Au+Au collisions at √s_NN=7.7−200 GeV.
Physical Review C. Roč. 93, č. 1 (2016), s. 1-8, č. článku 011901. ISSN 2469-9985. E-ISSN 2469-9993
Institutional support: RVO:68378271
Keywords : PHENIX * Brookhaven RHIC Coll * Monte Carlo * experimental results * 7.7 GeV * 19.6 GeV * 27 GeV * 39 GeV * 62.4 GeV * 200 GeV
OECD category: Particles and field physics
Impact factor: 3.820, year: 2016
Method of publishing: Limited access
https://doi.org/10.1103/physrevc.93.011901

We report the measurement of cumulants (Cn,n=1,...,4) of the net-charge distributions measured within pseudorapidity (|η|<0.35) in Au+Au collisions at sNN=7.7–200GeV with the PHENIX experiment at the Relativistic Heavy Ion Collider. The ratios of cumulants (e.g., C1/C2, C3/C1) of the net-charge distributions, which can be related to volume independent susceptibility ratios, are studied as a function of centrality and energy. These quantities are important to understand the quantum-chromodynamics phase diagram and possible existence of a critical end point. The measured values are very well described by expectation from negative binomial distributions. We do not observe any nonmonotonic behavior in the ratios of the cumulants as a function of collision energy. The measured values of C1/C2 and C3/C1 can be directly compared to lattice quantum-chromodynamics calculations and thus allow extraction of both the chemical freeze-out temperature.
Permanent Link: http://hdl.handle.net/11104/0307039