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Type: Journal article
Title: Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton–lead collisions at √sNN=5.02 TeV with the ATLAS detector
Other Titles: Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton-lead collisions at root sNN=5.02 TeV with the ATLAS detector
Author: Aad, G.
Abajyan, T.
Abbott, B.
Abdallah, J.
Abdel Khalek, S.
Abdinov, O.
Aben, R.
Abi, B.
Abolins, M.
AbouZeid, O.
Abramowicz, H.
Abreu, H.
Abulaiti, Y.
Acharya, B.
Adamczyk, L.
Adams, D.
Addy, T.
Adelman, J.
Adomeit, S.
Adye, T.
et al.
Citation: European Physical Journal C, 2016; 76(4):199-1-199-30
Publisher: Springer
Issue Date: 2016
ISSN: 1434-6044
Statement of
Paul D. Jackson … Lawrence Lee-Jr … Andreas Petridis … Anum Qureshi … Nitesh Soni … Martin White … et al. (ATLAS Collaboration)
Abstract: The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 μb−1 of proton–lead collisions at a nucleon–nucleon centre-of-mass energy of sNN−−−√=5.02 TeV using the ATLAS detector at the Large Hadron Collider. Charged particles with absolute pseudorapidity less than 2.7 are reconstructed using the ATLAS pixel detector. The Open image in new window collision centrality is characterised by the total transverse energy measured in the Pb-going direction of the forward calorimeter. The charged-particle pseudorapidity distributions are found to vary strongly with centrality, with an increasing asymmetry between the proton-going and Pb-going directions as the collisions become more central. Three different estimations of the number of nucleons participating in the Open image in new window collision have been carried out using the Glauber model as well as two Glauber–Gribov inspired extensions to the Glauber model. Charged-particle multiplicities per participant pair are found to vary differently for these three models, highlighting the importance of including colour fluctuations in nucleon–nucleon collisions in the modelling of the initial state of Open image in new window collisions.
Keywords: ATLAS Collaboration; ATLAS Collaboration; ATLAS Collaboration
Rights: © The Author(s) 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
RMID: 0030047227
DOI: 10.1140/epjc/s10052-016-4002-3
Appears in Collections:Physics publications

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