Measurements of two-particle correlations in e+e− collisions at 91 GeV with ALEPH archived data
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Published version
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421.26 KB
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Author(s)
Lee, Yen-Jie
Badea, Anthony
Baty, Austin
McGinn, Christopher
Innocenti, Gian Michele
Thaler, Jesse
Peters, Michael
Sheng, Tzu-An
Chang, Paoti
Maggi, Marcello
Date Issued
2019
Journal
Nuclear Physics A
Publisher
Elsevier BV
Version
Final published version
Abstract
© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . Measurements of two-particle angular correlations of charged particles emitted in hadronic Z decays are presented. The archived e+e- A nnihilation data at a center-of-mass energy of 91 GeV were collected with the ALEPH detector at LEP between 1992 and 1995. The correlation functions are measured over a broad range of pseudorapidity and full azimuth as a function of charged particle multiplicity. No significant long-range correlation is observed in either the lab coordinate analysis or the thrust coordinate analysis, where the latter is sensitive to a medium expanding transverse to the color string between the outgoing qq pair from Z boson decays. The associated yield distributions in both analyses are in better agreement with the prediction from the pythia v6.1 event generator than from herwig v7.1.5. They provide new insights to showering and hadronization modeling. These results serve as an important reference to the observed long-range correlation in proton-proton, proton-nucleus, and nucleus-nucleus collisions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution-NonCommercial-NoDerivs License
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DOI of Published Version
https://doi.org/10.1016/J.NUCLPHYSA.2018.09.018
