Charged-particle distributions in root s=13 TeV pp interactions measured with the ATLAS detector at the LHC

G. Aad, B. Abbott, J. Abdallah, O. Abdinov, B Abeloos, R. Aben, M. Abolins, O.S. AbouZeid, Abraham Nitzan, H. Abramowicz, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Peter Henrik Hansen, Almut Maria Pingel, Troels Christian Petersen, Lotte Ansgaard Thomsen, Alejandro Alonso Diaz, James William Monk, Gorm Aske Gram Krohn GalsterStefania Xella, Ask Emil Løvschall-Jensen, Graig Wiglesworth, Lars Egholm Pedersen, Almut Maria Pingel

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Abstract

Charged-particle distributions are measured in proton–proton collisions at a centre-of-mass energy of 13 TeV, using a data sample of nearly 9 million events, corresponding to an integrated luminosity of 170 μb−1, recorded by the ATLAS detector during a special Large Hadron Collider fill. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity and the dependence of the mean transverse momentum on the charged-particle multiplicity are presented. The measurements are performed with charged particles with transverse momentum greater than 500 MeV and absolute pseudorapidity less than 2.5, in events with at least one charged particle satisfying these kinematic requirements. Additional measurements in a reduced phase space with absolute pseudorapidity less than 0.8 are also presented, in order to compare with other experiments. The results are corrected for detector effects, presented as particle-level distributions and are compared to the predictions of various Monte Carlo event generators.

Original languageEnglish
JournalPhysics Letters B
Volume758
Pages (from-to)67-88
ISSN0370-2693
DOIs
Publication statusPublished - 10 Jul 2016

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