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Title: Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model

Abstract

The hydrokinetic approach that incorporates hydrodynamic expansion of the systems formed in A+A collisions and their dynamical decoupling is applied to restore the initial conditions and space-time picture of the matter evolution in central Au+Au collisions at the top Relativistic Heavy Ion Collider energy. The analysis is based on the detailed reproduction of the pion and kaon momentum spectra and femtoscopic data in whole interval of the transverse momenta studied by both the STAR and the PHENIX collaborations. The fitting procedure utilizes the two parameters: the maximal energy density at supposed thermalization time 1 fm/c and the strength of the prethermal flows developed to this time. The quark-gluon plasma and hadronic gas is supposed to be in complete local equilibrium above the chemical freeze-out temperature T{sub ch}=165 MeV with the equation of states (EoS) at high temperatures as in the lattice QCD. Below T{sub ch} the EoS in the expanding and gradually decoupling fluid depends on the composition of the hadron-resonance gas at each space-time point and accounts for decays of resonances into the nonequilibrated medium. A good description of the pion and kaon transverse momentum spectra and interferometry radii is reached at both used initial energy density profiles motivatedmore » by the Glauber and color glass condensate models, however, at different initial energy densities. The discussion as for the approximate pion and kaon m{sub T} scaling for the interferometry radii is based on a comparison of the emission functions for these particles.« less

Authors:
;  [1]
  1. Bogolyubov Institute for Theoretical Physics, Metrolohichna Strasse 14b, 03680 Kiev (Ukraine)
Publication Date:
OSTI Identifier:
21389043
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.81.054903; (c) 2010 The American Physical Society; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; ATOM-ATOM COLLISIONS; BNL; BROOKHAVEN RHIC; COLLISIONS; COLOR MODEL; COMPARATIVE EVALUATIONS; CONDENSATES; DECAY; DECOUPLING; EMISSION; ENERGY DENSITY; EQUATIONS OF STATE; FREEZING OUT; GOLD; HYDRODYNAMIC MODEL; INTERFEROMETRY; KAONS; MEV RANGE 100-1000; PARTICLE PRODUCTION; PIONS; QUANTUM CHROMODYNAMICS; QUARK MATTER; RESONANCE; SCALING; SPACE-TIME; SPECTRA; THERMALIZATION; TRANSVERSE MOMENTUM; ACCELERATORS; ATOM COLLISIONS; BOSONS; CALCULATION METHODS; COMPOSITE MODELS; ELEMENTARY PARTICLES; ELEMENTS; ENERGY RANGE; EQUATIONS; EVALUATION; FIELD THEORIES; HADRONS; HEAVY ION ACCELERATORS; LINEAR MOMENTUM; MATHEMATICAL MODELS; MATTER; MESONS; METALS; MEV RANGE; NATIONAL ORGANIZATIONS; PARTICLE MODELS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; QUARK MODEL; SEPARATION PROCESSES; SLOWING-DOWN; STATISTICAL MODELS; STORAGE RINGS; STRANGE MESONS; STRANGE PARTICLES; THERMODYNAMIC MODEL; TRANSITION ELEMENTS; US AEC; US DOE; US ERDA; US ORGANIZATIONS

Citation Formats

Karpenko, Iu A, and Sinyukov, Yu M. Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model. United States: N. p., 2010. Web. doi:10.1103/PHYSREVC.81.054903.
Karpenko, Iu A, & Sinyukov, Yu M. Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model. United States. https://doi.org/10.1103/PHYSREVC.81.054903
Karpenko, Iu A, and Sinyukov, Yu M. 2010. "Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model". United States. https://doi.org/10.1103/PHYSREVC.81.054903.
@article{osti_21389043,
title = {Kaon and pion femtoscopy at the highest energies available at the BNL Relativistic Heavy Ion Collider (RHIC) in a hydrokinetic model},
author = {Karpenko, Iu A and Sinyukov, Yu M},
abstractNote = {The hydrokinetic approach that incorporates hydrodynamic expansion of the systems formed in A+A collisions and their dynamical decoupling is applied to restore the initial conditions and space-time picture of the matter evolution in central Au+Au collisions at the top Relativistic Heavy Ion Collider energy. The analysis is based on the detailed reproduction of the pion and kaon momentum spectra and femtoscopic data in whole interval of the transverse momenta studied by both the STAR and the PHENIX collaborations. The fitting procedure utilizes the two parameters: the maximal energy density at supposed thermalization time 1 fm/c and the strength of the prethermal flows developed to this time. The quark-gluon plasma and hadronic gas is supposed to be in complete local equilibrium above the chemical freeze-out temperature T{sub ch}=165 MeV with the equation of states (EoS) at high temperatures as in the lattice QCD. Below T{sub ch} the EoS in the expanding and gradually decoupling fluid depends on the composition of the hadron-resonance gas at each space-time point and accounts for decays of resonances into the nonequilibrated medium. A good description of the pion and kaon transverse momentum spectra and interferometry radii is reached at both used initial energy density profiles motivated by the Glauber and color glass condensate models, however, at different initial energy densities. The discussion as for the approximate pion and kaon m{sub T} scaling for the interferometry radii is based on a comparison of the emission functions for these particles.},
doi = {10.1103/PHYSREVC.81.054903},
url = {https://www.osti.gov/biblio/21389043}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 5,
volume = 81,
place = {United States},
year = {Sat May 15 00:00:00 EDT 2010},
month = {Sat May 15 00:00:00 EDT 2010}
}