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).

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc></jats:title><jats:p>Two-particle angular correlations are measured in high-multiplicity proton-proton collisions at<jats:inline-formula><jats:alternatives><jats:tex-math>$$ \sqrt{s} $$</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math></jats:alternatives></jats:inline-formula>= 13 TeV by the ALICE Collaboration. The yields of particle pairs at short-(∆<jats:italic>η</jats:italic>∼ 0) and long-range (1<jats:italic>.</jats:italic>6<jats:italic>&lt;</jats:italic>|∆<jats:italic>η</jats:italic>|<jats:italic>&lt;</jats:italic>1<jats:italic>.</jats:italic>8) in pseudorapidity are extracted on the near-side (∆<jats:italic>φ</jats:italic>∼ 0). They are reported as a function of transverse momentum (<jats:italic>p</jats:italic><jats:sub>T</jats:sub>) in the range 1<jats:italic>&lt; p</jats:italic><jats:sub>T</jats:sub><jats:italic>&lt;</jats:italic>4 GeV/<jats:italic>c</jats:italic>. Furthermore, the event-scale dependence is studied for the first time by requiring the presence of high-<jats:italic>p</jats:italic><jats:sub>T</jats:sub>leading particles or jets for varying<jats:italic>p</jats:italic><jats:sub>T</jats:sub>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-<jats:italic>p</jats:italic><jats:sub>T</jats:sub>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<jats:italic>p</jats:italic><jats:sub>T</jats:sub>dependency, while overestimating the event-scale dependency.</jats:p>

Item Type: Article
Uncontrolled Keywords: Heavy Ion Experiments
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Dec 2021 13:17
Last Modified: 18 Jan 2023 21:19
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