Speaker
Description
Quark-gluon plasma (QGP) is a state of nuclear matter, where quarks and gluons are deconfined [1]. It can be formed in laboratory conditions in collisions of heavy ions at high energies [2]. Elliptic flow (v2), which reflects azimuthal anisotropy of hadron production in heavy ion collisions, is one of the main observables characterizing properties of QGP [3]. The study of the elliptic flow in relativistic heavy ion collisions (Cu+Cu and Au+Au) leads to the assumption that the QGP behaves as a nearly inviscid fluid [4]. The measurements of the v2 in Cu+Au asymmetric collision system allow to determine the dependence of the elliptic flow for light hadrons on the initial geometry of the system [5]. Since π0 meson consists of the first-generation quarks (u, d), its production is well-measurable up to high values of pT. Thus, the measurement of π0 meson v2 in Cu+Au collisions is considered as an effective tool to study QGP’s properties.
In symmetric collision systems such as Cu+Cu and Au+Au the scaling of elliptic flow values v2 for π0 mesons with the participant nucleon eccentricity (ε2) and with the third root of the number of participant nucleons (Npart1/3) in all centrality classes was observed [6]. Such scaling could be interpreted in the frame of relativistic hydrodynamic model, considering QGP formation [7]. The observation of ε2 Npart1/3 scaling in asymmetric Cu+Au collision system could lead to a conclusion that v2/(ε2 Npart1/3) values for π0 mesons do not depend on the initial geometry of the system. Current report presents the study of the elliptic flow for π0 mesons in asymmetric Cu+Au collisions at √sNN=200 GeV versus transverse momentum and centrality of the collision.
The research is partially funded by the Ministry of Science and Higher Education of the Russian Federation under the strategic academic leadership program ’Priority 2030’ (Agreement 075-15-2021-1333 dated 30.09.2021).
1. H. Buesching et al. (PHENIX Collaboration), J.Phys. G31 (2005) S473-S480;
2. Adcox K. et al. (PHENIX Collaboration), Nucl. Phys. A 2005. V.757;
3. P. Sorensen. (2010). Elliptic Flow: A Study of Space-Momentum Correlations in
Relativistic Nuclear Collisions. Quark-gluon plasma 4 (pp. 323-374);
4. K. Adcox et al. (PHENIX Collaboration), Nucl. Phys. 103 A757, 184 (2005);
5. R. Snellings. New J.Phys., 13 055008 (2011);
6. A. Adare et al. (PHENIX Collaboration), Phys.Rev.C 88, 064910 (2013);
7. Chaudhuri, A. (2013). Viscous Hydrodynamic Model for Relativistic Heavy Ion Collisions. Advances in High Energy Physics. 2013. 10.1155/2013/693180.c
| The speaker is a student or young scientist | Yes |
|---|---|
| Section | 3. Intermediate and high energies, heavy ion collisions |
