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Pre-hydrodynamic evolution in large and small systems
- Source :
- Phys. Rev. C 107, 044901 (2023)
- Publication Year :
- 2022
-
Abstract
- We extend our previous investigation of the effects of pre-hydrodynamic evolution on final-state observables in heavy-ion collisions to smaller systems. We use a state-of-the-art hybrid model for the numerical simulations with optimal parameters obtained from a previous Bayesian study. By studying p-Pb collisions, we find that the effects due to the assumption of a conformal evolution in the pre-hydrodynamical stage are even more important in small systems. We also show that this effect depends on the time duration of the pre-equilibrium stage, which is further enhanced in small systems. Finally, we show that the recent proposal of a free-streaming with subluminal velocity for the pre-equilibrium stage, thus effectively breaking conformal invariance, can alleviate the contamination of final state observables. Our study further reinforces the need for moving beyond conformal approaches in pre-equilibrium dynamics modeling, especially when extracting transport coefficients from hybrid models in the high-precision era of heavy-ion collisions.<br />Comment: 15 pages, 14 figures
- Subjects :
- Nuclear Theory
High Energy Physics - Phenomenology
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. C 107, 044901 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2211.10561
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.107.044901