Initial state with shear in peripheral heavy ion collisions
| Autor: | J. Gordillo, V. K. Magas, Yilong Xie, László P. Csernai, D. D. Strottman |
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| Přispěvatelé: | Universitat de Barcelona |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Angular momentum Conservation law Nuclear Theory Heavy ion collision 010308 nuclear & particles physics Streak FOS: Physical sciences Col·lisions d'ions pesats Parton Vorticity Polarization (waves) 01 natural sciences Vortex Nuclear Theory (nucl-th) Physics::Fluid Dynamics Fluid dynamics Quantum electrodynamics Dinàmica de fluids 0103 physical sciences 010306 general physics Shear flow |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname Dipòsit Digital de la UB Universidad de Barcelona |
| Popis: | In the present work we propose a new way of constructing the initial state for further hydrodynamic simulation of relativistic heavy ion collisions based on Bjorken-like solution applied streak by streak in the transverse plane. Previous fluid dynamical calculations in Cartesian coordinates with an initial state based on a streak by streak Yang-Mills field led for peripheral higher energy collisions to large angular momentum, initial shear flow and significant local vorticity. Recent experiments verified the existence of this vorticity via the resulting polarization of emitted Λ and ¯¯¯ Λ particles. At the same time parton cascade models indicated the existence of more compact initial state configurations, which we are going to simulate in our approach. The proposed model satisfies all the conservation laws, including conservation of a strong initial angular momentum, which is present in noncentral collisions. As a consequence of this large initial angular momentum we observe the rotation of the whole system as well as the fluid shear in the initial state, which leads to large flow vorticity. Another advantage of the proposed model is that the initial state can be given in both [t,x,y,z] and [ τ , x , y , η ] coordinates and thus can be tested by all 3+1D hydrodynamical codes which exist in the field. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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