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| Author(s): |
Caio Alves Garcia Prado
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física (IF/SBI) |
| Defense date: | 2013-04-16 |
| Examining board members: |
Alexandre Alarcon do Passo Suaide;
Jorge Jose Leite Noronha Junior;
Sandra dos Santos Padula
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| Advisor: | Alexandre Alarcon do Passo Suaide |
| Abstract | |
Central Au+Au collisions at RHIC exhibit strong particle suppression when compared to p+p collisions. This phenomenon can be understood in the framework of jet quenching or energy loss of partons inside the quark-gluon plasma (QGP). It is expected that heavier partons suffer less suppression than lighter ones. In this scenario, heavy quarks are less suppressed than light quarks. However, experiments show that heavy quarks are just as suppressed as light quarks. One possible explanation for that can be obtained when considering fluctuations in the medium that lead to high-density regions which can cause considerable quark energy loss at the early stages of the collision evolution. The QGP dynamics is also important as these high-density regions might expand differentty from the rest of the plasma. This work aims to analyse the overall U effect of these fluctuations in heavy quark suppression in the QGP. This can be done through computer simulations of charm and bottom propagating through the region considering different models of energy loss, which will then return an estimate of the nuclear modification factor (RAA). The final results for the RAA spectrum were found not to be affected by the included fluctuations in the initial conditions, meaning that these, in the way implemented here, are not sufficient to observe relevant modifications of the parton energy loss. There is, however, some open issues raised by this work that should be investigated in order to verify this conclusion. (AU) | |
| FAPESP's process: | 10/13106-3 - Initial conditions dependency in heavy quarks supression in ultra-relativistic colisions |
| Grantee: | Caio Alves Garcia Prado |
| Support Opportunities: | Scholarships in Brazil - Master |