HADRONIZATION VIA QUARK COALESCENCE OF THE QUARK GLUON PLASMA AT ULTRARELATIVISTIC HEAVY-ION COLLISIONS
type: CreativeWork
description: Quantum Chromodynamics (QCD) is the fundamental theory that governs the dynamics of strongly interacting particles and has quarks and gluons as elementary constituents, they represent the fundamental degrees of freedom of the theory carrying the "color" charge. The QCD have two peculiar features: colour confinement and asymptotic freedom. The asymptotic freedom allow us to study the strong interaction in a perturbative regime for sufficiently high energy processes, and implies that under particular condition of temperature or density the strong interaction that confines quarks and gluons becomes smaller enough to release them. Hence a new state of matter can exist in which the colour charges are deconfined in a Quark Gluon Plasma (QGP), the predictions of Lattice QCD indicate that the critical temperature in which the nuclear matter experiences a phase transition is Tc~160 MeV . Heavy Ion Collisions (HIC) at ultrarelativistic energy can be used to probe the properties of nuclear matter under extreme condition. In the studies of the QGP created in HIC is necessary to consider that partonic behaviour in QGP is not directly projected on the observables measured in experiments. This happens because the quark and gluon constituents must combine into hadrons. Thus the choice of the model for Hadronization process is a crucial point in order to have a comparison with experimental data. We are interested on an approach with the problem of hadronization of QGP that takes care about microscopic mechanism of hadronization. In the fragmentation scheme each parton fragments into a jet of hadrons which carries a fraction of initial parton momentum. Instead coalescence model describes the recombination of two or three quarks adding their momenta to form mesons or baryons. The coalescence model can predict the enhancement of baryon to meson ratio and the scaling of elliptic flow (v2) according to the constituent quark number that are observed at RHIC. We have implemented an hadroni…
abstract: Quantum Chromodynamics (QCD) is the fundamental theory that governs the dynamics of strongly interacting particles and has quarks and gluons as elementary constituents, they represent the fundamental degrees of freedom of the theory carrying the "color" charge. The QCD have two peculiar features: colour confinement and asymptotic freedom. The asymptotic freedom allow us to study the strong interaction in a perturbative regime for sufficiently high energy processes, and implies that under particular condition of temperature or density the strong interaction that confines quarks and gluons becomes smaller enough to release them. Hence a new state of matter can exist in which the colour charges are deconfined in a Quark Gluon Plasma (QGP), the predictions of Lattice QCD indicate that the critical temperature in which the nuclear matter experiences a phase transition is Tc~160 MeV . Heavy Ion Collisions (HIC) at ultrarelativistic energy can be used to probe the properties of nuclear matter under extreme condition. In the studies of the QGP created in HIC is necessary to consider that partonic behaviour in QGP is not directly projected on the observables measured in experiments. This happens because the quark and gluon constituents must combine into hadrons. Thus the choice of the model for Hadronization process is a crucial point in order to have a comparison with experimental data. We are interested on an approach with the problem of hadronization of QGP that takes care about microscopic mechanism of hadronization. In the fragmentation scheme each parton fragments into a jet of hadrons which carries a fraction of initial parton momentum. Instead coalescence model describes the recombination of two or three quarks adding their momenta to form mesons or baryons. The coalescence model can predict the enhancement of baryon to meson ratio and the scaling of elliptic flow (v2) according to the constituent quark number that are observed at RHIC. We have implemented an hadroni…
author: MINISSALE, VINCENZO
language: eng
keywords: Quark Gluon Plasma, Hadronization, Coalescence, Elliptic Flow
date published: 2017-01-30
date modified: 2026-07-24T01:35:10Z
provider: Università degli Studi di Catania
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Università degli studi di Catania

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property ID: Handle
value: https://hdl.handle.net/20.500.11769/582814