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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:11 |
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Conference: Bucharest University Faculty of Physics 2014 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
High pT particle suppression in relativistic nuclear collisions - (2)
Authors:
Raluca-Mihaela IORDACHE, Oana RISTEA
Affiliation:
University from Bucharest, Faculty of Physics
E-mail
ralucylle91@yahoo.com
Keywords:
quark-gluon plasma, relativistic nuclear collisions, high pt supression
Abstract:
Quantum chromodynamics predicts the existence of a new state of matter of deconfined quarks and gluons called quark-gluon plasma (QGP). It is considered that this extreme state of matter existed in the early Universe, about a few microseconds after Big Bang and also exists in the core of neutron stars. In nuclear collisions at relativistic energies one can obtain this state of matter – therefore experimentally the structure of matter, its properties and behavior under extreme conditions of density and temperature can be investigated.
On the early stages of a relativistic heavy ion collision, in hard scattering processes, particles with large mass or large transverse momentum, pT >2GeV/c, are created. Such particles are predicted to suffer energy loss as they traverse the very hot and dense medium, resulting in a suppression of hadrons with large transverse momentum. In this work, we will present the nuclear modification factors and the central-to-peripheral factors for the charged hadrons produced in Au + Au collisions at energies of 200 GeV and 64.3 GeV. The centrality dependence of these factors is shown. We estimated for the two avalaible energies the contribution from the hard processes associated with the production of these „hard” particles and we observed that the fraction is greater for the higher energy collisions.
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