Thermal fluctuations on the freeze-out surface of heavy-ion collisions and their impact on particle correlations

• Verfasst von: Aasen, Adrian Skasberg [VerfasserIn]
• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Verfasst von: Giacalone, Giuliano [VerfasserIn]
• Verfasst von: Gündüz, Deniz [VerfasserIn]
• Titel: Thermal fluctuations on the freeze-out surface of heavy-ion collisions and their impact on particle correlations
• Verf.angabe: Adrian Skasberg Aasen, Stefan Floerchinger, Giuliano Giacalone, Deniz Guenduez
• E-Jahr: 2023
• Jahr: 6 July 2023
• Umfang: 14 S.
• Fussnoten: Gesehen am 02.11.2023
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2023
• Band/Heft Quelle: 108(2023), 1, Artikel-ID 014904, Seite 1-14
• ISSN Quelle: 2469-9993
• DOI: doi:10.1103/PhysRevC.108.014904
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1869013646

Abstract

Particle momentum distributions originating from a quark-gluon plasma as produced in high-energy nuclear collisions can be influenced by thermal fluctuations in fluid dynamic fields. We study this effect by generalizing the commonly used kinetic freeze-out prescription by allowing for small fluctuations around an average in fluid velocity, chemical potentials, and temperature. This leads to the appearance of specific two-body momentum correlations. Combining a blast-wave parametrization of the kinetic freeze-out surface with the thermal correlation functions of an ideal resonance gas, we perform an exploratory study of angular net-charge correlations induced by thermal fluctuations around vanishing chemical potential. We note a diffusion of the near-side peak around Δy=Δϕ=0 induced by variances of different chemical potentials, which could be investigated experimentally.