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Search for the production of quark-gluon plasma in e+e- collisions at [square root of] s = 91.2 GeV with Archived ALEPH LEP1 data

Author(s)
Badea, Anthony Shane Nicolae.
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Download1132722019-MIT.pdf (23.81Mb)
Other Contributors
Massachusetts Institute of Technology. Department of Physics.
Advisor
Yen-Jie Lee and Jesse Thaler.
Terms of use
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission. http://dspace.mit.edu/handle/1721.1/7582
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Abstract
Measurements of two-particle angular correlations for charged particles emitted in e+ e- collisions at a center-of-mass energy of 91 GeV are presented. The archived data are collected with the ALEPH detector at LEP. 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 both the lab coordinate analysis and in the thrust coordinate analysis, where the later is sensitive to a medium expanding around the color string between the outgoing qq̄ pair from the Z boson decay. The associated yield distributions in both analyses are in better agreement with predictions from the PYTHIA event generator than those from HERWIG, providing new insights into the hadronization modeling. These results serve as an important reference to the observed long-range correlation in proton-proton, proton-nucleus and nucleus-nucleus collisions.
Description
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
 
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2019
 
In title on title-page, "[square root of]" is the symbol. Cataloged from student-submitted PDF version of thesis.
 
Includes bibliographical references (pages 135-145).
 
Date issued
2019
URI
https://hdl.handle.net/1721.1/123342
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Massachusetts Institute of Technology
Keywords
Physics.

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