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| Author(s): |
João Guilherme Prado Barbon
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin |
| Defense date: | 2021-12-22 |
| Examining board members: |
Jun Takahashi;
Arlene Cristina Aguilar;
Marcelo Gameiro Munhoz
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| Advisor: | Jun Takahashi |
| Abstract | |
In the initial stages of a heavy-ion collision, the quarks and gluons are in a deconfined state, referred to as Quark-Gluon Plasma (QGP). This state is believed to behave as a strongly coupled fluid. A jet formed nearby can interact directly with this medium, depositing energy and forming a vortical structure inside the fluid. In this work, we present the study of the effects caused by the thermalization of the jet energy and momentum in the plasma. The momentum deposited in the medium will create a large velocity gradient in the fluid that will form vorticity rings, and that ultimately can cause a polarization of Lambda particles at hadronization. In our model we approximate the jet as a region of higher energy density, representing the thermalization left by it in the QGP. This system is simulated using a (3+1)D second order viscous hydrodynamic code. We also do a systematic study of the evolution of the jet thermalization inside the fluid, analyzing properties such as local energy density and vorticity response to variations in the fluid's viscosity. The vorticity ring created by the perturbation in the QGP is directly related to the polarization of the Lambda particles. We use this polarization to build a ring observable R that selects only the vorticity contribution created by the jet. We also study the R observable for different scenarios of hydrodynamic simulations (AU) | |
| FAPESP's process: | 19/16293-3 - Phenomenology on LHC heavy ion collisions |
| Grantee: | João Guilherme Prado Barbon |
| Support Opportunities: | Scholarships in Brazil - Master |