Hot spots and gluon field fluctuations as causes of eccentricity in small systems

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Demirci , S P , Lappi , T & Schlichting , S 2021 , ' Hot spots and gluon field fluctuations as causes of eccentricity in small systems ' , Physical Review D , vol. 103 , no. 9 , 094025 . https://doi.org/10.1103/PhysRevD.103.094025

Title: Hot spots and gluon field fluctuations as causes of eccentricity in small systems
Author: Demirci, Sami Petteri; Lappi, Tuomas; Schlichting, S.
Contributor organization: Helsinki Institute of Physics
Date: 2021-05-21
Language: eng
Number of pages: 23
Belongs to series: Physical Review D
ISSN: 2470-0010
DOI: https://doi.org/10.1103/PhysRevD.103.094025
URI: http://hdl.handle.net/10138/332393
Abstract: 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 tau = 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.
Subject: 114 Physical sciences
PROTON-LEAD COLLISIONS
PLUS PB COLLISIONS
HIGH TRANSVERSE-MOMENTUM
LONG-RANGE
AZIMUTHAL ANISOTROPIES
ANGULAR-CORRELATIONS
NEAR-SIDE
FLOW
PPB
HARMONICS
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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