| Full text | |
| Author(s): |
da Silva, T. Nunes
[1]
;
Chinellato, D.
[2]
;
Denicol, G. S.
[3]
;
Hippert, M.
[4, 5, 2]
;
Luzum, M.
[6]
;
Noronha, J.
[4, 5]
;
Serenone, W.
[2]
;
Takahashi, J.
[2]
;
Collaboration, ExTrEMe
Total Authors: 9
|
| Affiliation: | [1] Univ Fed Santa Catarina, Ctr Ciencias Fis & Matemat, Dept Fis, Campus Univ Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC - Brazil
[2] Univ Estadual Campinas, Inst Fis Gleb Wataghin, R Sergio Buarque de Holanda 777, BR-13083859 Campinas - Brazil
[3] Univ Fed Fluminense, Inst Fis, Av Milton Tavares de Souza, BR-24210346 Niteroi, RJ - Brazil
[4] Univ Illinois, Dept Phys, Urbana, IL 61801 - USA
[5] Univ Illinois, Illinois Ctr Adv Studies Universe, Urbana, IL 61801 - USA
[6] Univ Sao Paulo, Inst Fis, R Matao 1371, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Physical Review C; v. 103, n. 5 MAY 16 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
We investigate the effects of prehydrodynamic evolution on final-state observables in heavy-ion collisions using state-of-the art event simulations coupled to different prehydrodynamic scenarios, which include the recently developed effective kinetic transport theory evolution model Kempty setMPempty setST. Differential flow observables are found to be mostly insensitive to the details of prehydrodynamic evolution. The main effect we observe is in the P T spectra, particularly the mean transverse momentum. However, at least part of this effect is a consequence of the underlying conformal invariance assumption currently present in such approaches, which is known to be violated in the temperature regime probed in heavy-ion collisions. This assumption of early time conformal invariance leads to an artificially large out-of-equilibrium bulk pressure when switching from (conformal) prehydrodynamic evolution to hydrodynamics (using the nonconformal QCD equation of state), which in turn increases the transverse momentum. Our study indicates that a consistent treatment of prehydrodynamic evolution in heavy-ion collisions requires the use of nonconformal models of early time dynamics. (AU) | |
| FAPESP's process: | 18/07833-1 - Hydrodynamical behavior of the QGP near the critical point |
| Grantee: | Maurício Hippert Teixeira |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/24029-6 - Investigating the strong nuclear interactions under extreme conditions |
| Grantee: | Matthew William Luzum |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 17/05685-2 - Hadronic physics in high energy nuclear collisions |
| Grantee: | Jun Takahashi |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 18/01245-0 - Characterization of the QGP through the hydrodynamic evolution |
| Grantee: | Tiago Jose Nunes da Silva |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/24720-6 - Exploring the QCD phase diagram |
| Grantee: | Frédérique Marie Brigitte Sylvie Grassi |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/13803-2 - Strangeness production in Pb-Pb collisions at 5.02TeV in ALICE |
| Grantee: | David Dobrigkeit Chinellato |
| Support Opportunities: | Regular Research Grants |