# Measurement of jet fragmentation in 5.02 TeV proton-lead and proton-proton collisions with the ATLAS detector

Collaboration, ATLAS
(2018) Measurement of jet fragmentation in 5.02 TeV proton-lead and proton-proton collisions with the ATLAS detector. Nucl. Phys. A, 978. 65 - 65.

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## Abstract

A measurement of the fragmentation functions of jets into charged particles in $p$+Pb collisions and $pp$ collisions is presented. The analysis utilizes 28 nb$^{-1}$ of $p$+Pb data and 26 pb$^{-1}$ of $pp$ data, both at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV, collected in 2013 and 2015, respectively, with the ATLAS detector at the LHC. The measurement is reported in the centre-of-mass frame of the nucleon-nucleon system for jets in the rapidity range $|y^{*}|<$1.6 and with transverse momentum 45 $< p_{\mathrm{T}} <$ 260 GeV. Results are presented both as a function of the charged-particle transverse momentum and as a function of the longitudinal momentum fraction of the particle with respect to the jet. The $pp$ fragmentation functions are compared with results from Monte Carlo event generators and two theoretical models. The ratios of the $p$+Pb to $pp$ fragmentation functions are found to be consistent with unity.

Item Type: Article 38 pages in total, author list starting page 22, 11 figures, 0 tables, published in Nucl. Phys. A. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2015-04/ hep-ex, hep-ex Symplectic Admin 07 Sep 2018 15:27 13 May 2021 08:55 10.1016/j.nuclphysa.2018.07.006 https://www.sciencedirect.com/science/article/pii/... https://livrepository.liverpool.ac.uk/id/eprint/3025943