Symmetry plane correlations in Pb–Pb collisions at √sNN = 2.76 TeV
Year of publication
2023
Authors
The ALICE collaboration; Acharya, S.; Adamová, D.; Huhta, Laura Maria; Kim, D. J.; Melikyan, Yury; Molander, Mikael Andreas; Onnerstad, A.; Parkkila, J. E.; Rytkönen, Heidi Maria; Räsänen, Sami; Saarimäki, Oskari Antti Matti; Slupecki, M.; Trzaska, W. H.; Virta, Maxim Mikael Olavi
Show moreAbstract
A newly developed observable for correlations between symmetry planes, which characterize the direction of the anisotropic emission of produced particles, is measured in Pb–Pb collisions at √sNN = 2.76 TeV with ALICE. This so-called Gaussian Estimator allows for the first time the study of these quantities without the influence of correlations between different flow amplitudes. The centrality dependence of various correlations between two, three and four symmetry planes is presented. The ordering of magnitude between these symmetry plane correlations is discussed and the results of the Gaussian Estimator are compared with measurements of previously used estimators. The results utilizing the new estimator lead to significantly smaller correlations than reported by studies using the Scalar Product method. Furthermore, the obtained symmetry plane correlations are compared to state-of-the-art hydrodynamic model calculations for the evolution of heavy-ion collisions. While the model predictions provide a qualitative description of the data, quantitative agreement is not always observed, particularly for correlators with significant non-linear response of the medium to initial state anisotropies of the collision system. As these results provide unique and independent information, their usage in future Bayesian analysis can further constrain our knowledge on the properties of the QCD matter produced in ultrarelativistic heavy-ion collisions.
Show moreOrganizations and authors
University of Helsinki
Kim D. J.
Rytkönen Heidi Maria
Parkkila J. E.
Huhta Laura Maria
Slupecki M.
Virta Maxim Mikael Olavi
Molander Mikael Andreas
Saarimäki Oskari Antti Matti
Räsänen Sami
Trzaska W. H.
Melikyan Yury
University of Jyväskylä
Önnerstad Anna
Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Journal
Parent publication name
Publisher
Volume
83
Article number
576
ISSN
Publication forum
Publication forum level
2
Open access
Open access in the publisher’s service
Yes
Open access of publication channel
Fully open publication channel
Self-archived
Yes
Other information
Fields of science
Physical sciences
Keywords
[object Object],[object Object],[object Object],[object Object]
Publication country
Germany
Internationality of the publisher
International
Language
English
International co-publication
Yes
Co-publication with a company
No
DOI
10.1140/epjc/s10052-023-11658-w
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes