CERN Accelerating science

Article
Report number arXiv:1811.09742 ; CERN-EP-2018-303
Title Jet fragmentation transverse momentum measurements from di-hadron correlations in s = 7 TeV pp and sNN = 5.02 TeV p-Pb collisions
Author(s) ALICE Collaboration  ყველა 1015 ავტორის ჩვენება
Publication 2019-03-26
Imprint 02 Nov 2018
Number of pages 21
Note 21 pages, 1 captioned table, 8 figures, authors from page 16, published version, figures at http://alice-publications.web.cern.ch/node/4750
In: JHEP 03 (2019) 169
DOI 10.1007/JHEP03(2019)169
Subject category Nuclear Physics - Experiment ; hep-ex ; Particle Physics - Experiment ; nucl-ex
Accelerator/Facility, Experiment CERN LHC ; ALICE
Free keywords QCD ; relativistic heavy ion physics ; quark gluon plasma ; particle and resonance production ; jet physics ; experimental results
Abstract The transverse structure of jets was studied via jet fragmentation transverse momentum (jT) distributions, obtained using two-particle correlations in proton-proton and proton-lead collisions, measured with the ALICE experiment at the LHC. The highest transverse momentum particle in each event is used as the trigger particle and the region 3<pTt<15 GeV/c is explored in this study. The measured distributions show a clear narrow Gaussian component and a wide non-Gaussian one. Based on Pythia simulations, the narrow component can be related to non-perturbative hadronization and the wide component to quantum chromodynamical splitting. The width of the narrow component shows a weak dependence on the transverse momentum of the trigger particle, in agreement with the expectation of universality of the hadronization process. On the other hand, the width of the wide component shows a rising trend suggesting increased branching for higher transverse momentum. The results obtained in pp collisions at s = 7 TeV and in p-Pb collisions at sNN = 5.02 TeV are compatible within uncertainties and hence no significant cold nuclear matter effects are observed. The results are compared to previous measurements from CCOR and PHENIX as well as to Pythia 8 and Herwig 7 simulations.
Copyright/License publication: (License: CC-BY-4.0)
Preprint: © 2018-2024 CERN (License: CC-BY-4.0)



Corresponding record in: Inspire
Email contact: david.dobrigkeit.chinellato@cern.ch


 ჩანაწერი შექმნილია 2018-11-02, ბოლოს შესწორებულია 2024-11-27


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