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| Author(s): |
Renato Aparecido Negrão de Oliveira
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física (IF/SBI) |
| Defense date: | 2014-11-12 |
| Examining board members: |
Alexandre Alarcon do Passo Suaide;
David Dobrigkeit Chinellato;
Jorge Jose Leite Noronha Junior;
Sandra dos Santos Padula;
Emi Marcia Takagui
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| Advisor: | Alexandre Alarcon do Passo Suaide |
| Abstract | |
The goal of relativistic heavy-ion collisions is to study the behavior of quarks and gluons under extreme conditions of pressure, density and temperature, such as those expected to have existed in the the beginning of the universe. In this work, the transverse energy ET was investigated for Au+Au collisions measured with the STAR experiment at RHIC with beam energies from 7.7 to 200 GeV. The centrality and collision energy dependence of ET per number of participants was measured, as well as the energy dependence for the ET per charged particles in central collisions. The results indicate that for collision energies less than 7.7 GeV the average transverse energy per unit charge varies significantly with increasing collision energy, reaching the saturation limit for energies higher than 7.7 GeV, where this ratio becomes almost constant. The electromagnetic fraction of the total ET was estimated, and the results are in agreement with a final state dominated by baryons, for lower energies, and a meson dominated state for higher energies. (AU) | |
| FAPESP's process: | 09/08082-0 - The use of the Trojan Horse method to study nuclear reactions with astrophysics motivation |
| Grantee: | Renato Aparecido Negrao de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |