Model comparison for initial density fluctuations in high-energy heavy-ion collisions
Four models for the initial conditions of a fluid dynamic description of high-energy heavy-ion collisions are analyzed and compared. We study expectation values and event-by-event fluctuations in the initial transverse energy density profiles from Pb-Pb collisions. Specifically, introducing a Fourie...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
30 November 2020
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| In: |
Physical review
Year: 2020, Volume: 102, Issue: 5 |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.102.054914 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.102.054914 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.102.054914 
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| Author Notes: | Stefan Floerchinger, Eduardo Grossi, and Kianusch Vahid Yousefnia |
| Summary: | Four models for the initial conditions of a fluid dynamic description of high-energy heavy-ion collisions are analyzed and compared. We study expectation values and event-by-event fluctuations in the initial transverse energy density profiles from Pb-Pb collisions. Specifically, introducing a Fourier-Bessel mode expansion for fluctuations, we determine expectation values and two-mode correlation functions of the expansion coefficients. The analytically solvable independent point-sources model is compared to an initial-state model based on Glauber theory and two models based on the color glass condensate framework. We find that the large-wavelength modes of all investigated models show universal properties for central collisions and also discuss to what extent general properties of initial conditions can be understood analytically. |
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| Item Description: | Gesehen am 11.01.2021 |
| Physical Description: | Online Resource |
| ISSN: | 2469-9993 |
| DOI: | 10.1103/PhysRevC.102.054914 |