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| Ultimo aggiornamento | 17 lug 2013 |
| Autore |
Vincenzo
Minissale |
| Sesso | M |
| Esperimento | RM31 |
| Tipo | Laurea Magistrale |
| Destinazione dopo il cons. del titolo | Altro |
| Università | Università Di Catania |
| Strutt.INFN/Ente |
Lab. Naz. del Sud |
| Titolo | Hadronization of the Quark-Gluon Plasma in the relativistic heavy-ion collisions |
| Abstract | Heavy Ion Collisions (HIC) at ultrarelativistic energy an be used to probe the properties of nuclear matter under such extreme condition.cSignatures of a Quark Gluon Plasma formation became manifest in the experiment with energies up to 200 AGeV performed at Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory. Further infor mations as well as new discoveries have been coming from the experiments at Large Hadron Collider (LHC) started in 2010 where it possible reach energies up to 5.5 TeV. In the studies of the Quark Gluon Plasma created in HIC is necessary taking into a account that partonic behaviour in QGP is not directly projected on the observables measured in heavy ion collision experiments. This happens because the quark and gluon constituents must combine into colour-neutral objects, the hadrons. Thus the hoi e of the model for Hadronization process is a crucial point in order to have a comparison with experimental data. There are at least two different classes of approaches to deal with the problem of hadronization of QGP. The rst one is based on a statistical model, this approach does not are about microsopic mechanism that leads to production of hadrons, because it assumes that the number of hadrons and the spectra follows the kinetic and chemical equilibrium laws of statistical mechanics. The other class of modeling takes are about microscopic mechanism of hadronization. Within the microscopic description two different approaches have been developed: fragmentation and coalescence. The coalescence model that has a marginal role in the hadronization processes in pp collisions, has been able to explain at least two unex- pected observations, that other models an not explain simultaneously. In particular the coalesence model an predicts the enhancement of proton to pion ratio at intermediate transverse momenta and the scaling of elliptic fl ow a ording to the constituent quark number that are observed in Au+Au collisions at RHIC. In this work we have developed a numerical code to implement an hadronization model based on coalescence mechanism, where fragmen- tation has been taken into account to reproduce the features of hadron spectra at high transverse momentum accounting for the transition between the two mechanism. |
| Anno iscrizione | 2008 |
| Data conseguimento | 27 mar 2013 |
| Luogo conseguimento | Università di Catania |
| Relatore/i |
Vincenzo Greco |
| File PDF |
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| File PS | |
