A1 Journal article (refereed)
Hot spots and gluon field fluctuations as causes of eccentricity in small systems (2021)

Demirci, S., Lappi, T., & Schlichting, S. (2021). Hot spots and gluon field fluctuations as causes of eccentricity in small systems. Physical Review D, 103(9), Article 094025. https://doi.org/10.1103/PhysRevD.103.094025

JYU authors or editors

Publication details

All authors or editors: Demirci, S.; Lappi, T.; Schlichting, S.

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2021

Publication date: 21/05/2021

Volume: 103

Issue number: 9

Article number: 094025

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.103.094025

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77030

Publication is parallel published: https://arxiv.org/abs/2101.03791


We calculate eccentricities in high energy proton-nucleus collisions, by calculating correlation functions of the energy density field of the glasma immediately after the collision event at proper time τ=0+. We separately consider the effects of color charge and geometrical hot spot fluctuations, analytically performing the averages over both in a dilute-dense limit. We show that geometric fluctuations of hot spots inside the proton are the dominant source of eccentricity whereas color charge fluctuations only give a negligible correction. The size and number of hot spots are the most important parameters characterizing the eccentricities.

Keywords: particle physics; quark-gluon plasma

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Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 2

Last updated on 2022-14-09 at 11:52