Jet fragmentation transverse momentum measurements from di-hadron correlations in √s = 7 TeV pp and √sNN = 5.02 TeV p–Pb collisions
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
s = 7TeV 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.
Collections

DSpace@Karatay by Karatay University Institutional Repository is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 Unported License..