Aaboud, M;
Aad, G;
Abbott, B;
Abdallah, J;
Abdinov, O;
Abeloos, B;
Aben, R;
... Zwalinski, L; + view all
(2017)
Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector.
Physical Review C
, 95
(6)
, Article 064914. 10.1103/PhysRevC.95.064914.
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Abstract
Two-particle pseudorapidity correlations are measured in √ s NN = 2.76 TeV Pb + Pb , √ s NN = 5.02 TeV p +Pb, and √ s = 13 TeV p p collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7 μ b − 1 , 28 nb − 1 , and 65 nb − 1 , respectively. The correlation function C N ( η 1 , η 2 ) is measured as a function of event multiplicity using charged particles in the pseudorapidity range | η | < 2.4 . The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1 + ⟨ a 2 1 ⟩ 1 / 2 η 1 η 2 in all collision systems over the full multiplicity range. The values of ⟨ a 2 1 ⟩ 1 / 2 are consistent for the opposite-charge pairs and same-charge pairs, and for the three collision systems at similar multiplicity. The values of ⟨ a 2 1 ⟩ 1 / 2 and the magnitude of the short-range component both follow a power-law dependence on the event multiplicity. The short-range component in p + Pb collisions, after symmetrizing the proton and lead directions, is found to be smaller at a given η than in p p collisions with comparable multiplicity.
| Type: | Article |
|---|---|
| Title: | Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevC.95.064914 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevC.95.064914 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. |
| Keywords: | Science & Technology, Physical Sciences, Physics, Nuclear, Physics, CHARGED-PARTICLE DISTRIBUTIONS, ANGULAR-CORRELATIONS, TRANSVERSE-MOMENTUM, UNDERLYING EVENT, PP COLLISIONS, PB COLLISIONS, LONG-RANGE, TEV, ENERGIES, LHC |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1507519 |
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