Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/124368
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Type: Journal article
Title: Measurement of jet fragmentation in Pb+Pb and pp collisions at √sNN =5.02 TeV with the ATLAS detector
Other Titles: Measurement of the azimuthal anisotropy of charged particles produced in root sNN = 5.02 TeV Pb+Pb collisions with the ATLAS detector
Author: Aaboud, M.
Aad, G.
Abbott, B.
Abdinov, O.
Abeloos, B.
Abhayasinghe, D.K.
Abidi, S.H.
Abouzeid, O.S.
Abraham, N.L.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.S.
Adachi, S.
Adamczyk, L.
Adelman, J.
Adersberger, M.
Adiguzel, A.
Adye, T.
Affolder, A.A.
et al.
Citation: Physical Review C, 2018; 98(2):024908-1-024908-34
Publisher: American Physical Society
Issue Date: 2018
ISSN: 2469-9985
2469-9993
Statement of
Responsibility: 
M. Aaboud, G. Aad … Paul D. Jackson … Andreas Petridis … Abhishek Sharma … Martin White … et al. (The ATLAS Collaboration)
Abstract: This paper presents a measurement of jet fragmentation functions in 0.49 nb − 1 of Pb+Pb collisions and 25 pb − 1 of p p collisions at √ s NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in p p collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.
Rights: ©2018 CERN, for the ATLAS Collaboration
RMID: 0030096496
DOI: 10.1103/PhysRevC.98.024908
Appears in Collections:Physics publications

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