Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton–lead collisions at √sNN = 5.02 TeV with the ATLAS detector. European physical journal. C - particles and fields, 76(4) EDP Sciences 10.1140/epjc/s10052-016-4002-3
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The centrality dependence of the mean charged-particle multiplicity as a function of pseudorapidity is measured in approximately 1 μ b⁻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 p +Pb 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 p +Pb 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 p +Pb collisions.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Haug, Sigve, Weber, Michele, Beck, Hans Peter |
Subjects: |
500 Science > 530 Physics 500 Science > 510 Mathematics |
ISSN: |
1434-6044 |
Publisher: |
EDP Sciences |
Language: |
English |
Submitter: |
Annette Krebs-Wegenast |
Date Deposited: |
16 Aug 2017 13:38 |
Last Modified: |
05 Dec 2022 15:05 |
Publisher DOI: |
10.1140/epjc/s10052-016-4002-3 |
Additional Information: |
Kollaboration - Es sind nur die Berner Autoren namentlich erwähnt. |
BORIS DOI: |
10.7892/boris.100025 |
URI: |
https://boris.unibe.ch/id/eprint/100025 |
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