Model comparison for initial density fluctuations in high-energy heavy-ion collisions

• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Verfasst von: Grossi, Eduardo [VerfasserIn]
• Verfasst von: Vahid Yousefnia, Kianusch [VerfasserIn]
• Titel: Model comparison for initial density fluctuations in high-energy heavy-ion collisions
• Verf.angabe: Stefan Floerchinger, Eduardo Grossi, and Kianusch Vahid Yousefnia
• E-Jahr: 2020
• Jahr: 30 November 2020
• Umfang: 16 S.
• Fussnoten: Gesehen am 11.01.2021
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2020
• Band/Heft Quelle: 102(2020,5) Artikel-Nummer 054914, 16 Seiten
• ISSN Quelle: 2469-9993
• DOI: doi:10.1103/PhysRevC.102.054914
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1744291365

Abstract

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.