Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at <mml:msqrt>s</mml:msqrt>=13 TeV



Acharya, S, Adamova, D, Adler, A, Adolfsson, J, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU
et al (show 998 more authors) (2021) Long- and short-range correlations and their event-scale dependence in high-multiplicity pp collisions at <mml:msqrt>s</mml:msqrt>=13 TeV JOURNAL OF HIGH ENERGY PHYSICS, 2021 (5). 290-. ISSN 1126-6708, 1029-8479

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Abstract

Two-particle angular correlations are measured in high-multiplicity proton-proton collisions at s = 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(∆η ∼ 0) and long-range (1.6 < |∆η| < 1.8) in pseudorapidity are extracted on the near-side (∆φ ∼ 0). They are reported as a function of transverse momentum (p<inf>T</inf>) in the range 1 < p<inf>T</inf>< 4 GeV/c. Furthermore, the event-scale dependence is studied for the first time by requiring the presence of high-p<inf>T</inf> leading particles or jets for varying p<inf>T</inf> thresholds. The results demonstrate that the long-range “ridge” yield, possibly related to the collective behavior of the system, is present in events with high-p<inf>T</inf> processes as well. The magnitudes of the short- and long-range yields are found to grow with the event scale. The results are compared to EPOS LHC and PYTHIA 8 calculations, with and without string-shoving interactions. It is found that while both models describe the qualitative trends in the data, calculations from EPOS LHC show a better quantitative agreement for the p<inf>T</inf> dependency, while overestimating the event-scale dependency. [Figure not available: see fulltext.]

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments
Divisions: Faculty of Science & Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Dec 2021 13:17
Last Modified: 16 Jun 2026 07:25
DOI: 10.1007/JHEP05(2021)290
Open Access URL: https://link.springer.com/article/10.1007%2FJHEP05...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3145492
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