Femtoscopy scales and particle production in the relativistic heavy ion collisions from Au+Au at 200 AGeV to Xe+Xe at 5.
- PDF / 959,285 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 6 Downloads / 145 Views
Review
Femtoscopy scales and particle production in the relativistic heavy ion collisions from Au+Au at 200 AGeV to Xe+Xe at 5.44 ATeV within the integrated hydrokinetic model V. M. Shapoval1 , M. D. Adzhymambetov1 , Yu. M. Sinyukov1,2,a 1 2
Bogolyubov Institute for Theoretical Physics, 14b Metrolohichna street, Kiev 03143, Ukraine Department of Physics, Tomsk State University, Lenin Ave. 36, Tomsk 634050, Russian Federation
Received: 29 June 2020 / Accepted: 28 September 2020 / Published online: 12 October 2020 © Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Communicated by Laura Tolos
Abstract The recent results on the main soft observables, including hadron and photon yields and particle number ratios, pT spectra, flow harmonics, as well as the femtoscopy radii, obtained within the integrated hydrokinetic model (iHKM) for high-energy heavy-ion collisions are reviewed and re-examined. The cases of different nuclei colliding at different energies are considered: Au+Au collisions at the √ top RHIC energy s N N = 200 GeV, Pb+Pb collisions at the √ √ LHC energies s N N = 2.76 TeV and s N N = 5.02 TeV, √ and the LHC Xe+Xe collisions at s N N = 5.44 TeV. The effect of the initial conditions and the model parameters, including the utilized equation of state (EoS) for quark-gluon phase, on the simulation results, as well as the role of the final afterburner stage of the matter evolution are discussed. The possible solution of the so-called “photon puzzle” is considered. The attention is also paid to the dependency of the interferometry volume and individual interferometry radii on the initial transverse geometrical size of the system formed in the collision.
1 Introduction Present-day the ultrarelativistic heavy-ion collision experiments, carried out at the BNL Relativistic Heavy Ion Collider (RHIC) and at the CERN Large Hadron Collider (LHC), provide the only laboratory method of obtaining a new unusual quark-gluon state of matter, characterized by extremely high temperature and energy densities. It is believed that this state is quite similar to the one the matter had in the very early Universe at times about 10−6 s after the Big Bang. Naturally, the comprehensive study of the properties of matter under a e-mail:
[email protected] (corresponding author)
such extreme conditions and the dynamics of its evolution constitutes a fundamental physical problem. In ultrarelativistic heavy-ion collision, in the energy range starting from top RHIC and higher, due to strong Lorentz contraction the two colliding nuclei can be considered as ultrathin “pancakes” of quarks and gluons moving towards each other at a great speed.1 After the nuclei pass through each other and carry away practically all the net baryon charge, the space region between them becomes occupied by a hot and dense system of partons with small (for RHIC) or practically zero (for LHC) baryon chemical potential. Such a system fastly expands, cools down, and eventually disintegrates into a system of about several
Data Loading...
