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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:24 |
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Conference: Bucharest University Faculty of Physics 2013 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Preliminary comparison of the hadron production at very high energies in the transverse momenta space
Authors:
A.Danu (1), O. Ristea (2), C. Besliu (2), Al. Jipa (2), I. S. Zgura (1), C. Ristea (1), A. Sevenco (1), C. M. Mitu (1), T. Esanu (2)
Affiliation:
(1)Institute of Space Science – ISS, Magurele, Romania
(2)University of Bucharest – Faculty of Physics, Magurele, Romania
E-mail
ada@spacescience.ro
Keywords:
colliders, high energy, nuclear time evolution, chemical potentials, RHIC, LHC
Abstract:
The two heavy ion colliders in work, RHIC, at BNL (USA) and LHC (CERN Geneva) extended Nuclear Physics studies to the highest energies available in laboratory (200 GeV/nucleon, 5.02 TeV/nucleon, in CMS) and allowed the investigation of nuclear matter in the quark-gluon plasma phase and above. Possible connections with cosmological scenarios have now a significant support. Also,comparisons of the published experimental results obtained in different collisions performed at the two colliders, at different energies, allow to analyze some noticeable aspects for mentioned connections, as the time dependence, dynamics models, tendency to the chiral symmetry restoration, behaviour of hadron to antihadron ratios, in different transverse momentum ranges etc.This work is focused on the above listed problems and includes comparisons, in different transverse momentum ranges, for the hadron yields, in Au-Au collisions at maximum RHIC-BNL energy and in Pb-Pb collisions at 2.76 TeV/nucleon, in CMS, respectively, by ALICE Collaboration from LHC-CERN, mainly.The main contribution of this work consists in the introduction of nuclear time evolution for the hadron production and its refection in multiplicities, transverse masses, hadron to antihadron ratios, chemical strange-baryonic potentials. Among the preliminary results of the comparisons we mention: possible signal of a nuclear bursting for the fireball (time < 0.5-1 fm/c); suggestion on a metastable state for fireball; tendency towards chiral symmetry (µS,B→0 at ); increase with incident energy of the weight for the strange hadrons.
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