Measurement of (2S) production as a function of charged-particle pseudorapidity density in pp collisions at √s=13 TeV and p-Pb collisions at √sNN=8.16 TeV with ALICE at the LHC



Acharya, S, Adamova, D, Adler, A, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, S, Ahn, SU, Ahuja, I
et al (show 1022 more authors) (2023) Measurement of (2S) production as a function of charged-particle pseudorapidity density in pp collisions at √s=13 TeV and p-Pb collisions at √sNN=8.16 TeV with ALICE at the LHC JOURNAL OF HIGH ENERGY PHYSICS, 2023 (6). 147-. ISSN 1029-8479, 1029-8479

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Abstract

Production of inclusive charmonia in pp collisions at center-of-mass energy of s = 13 TeV and p–Pb collisions at center-of-mass energy per nucleon pair of sNN = 8.16 TeV is studied as a function of charged-particle pseudorapidity density with ALICE. Ground and excited charmonium states (J/ψ, ψ(2S)) are measured from their dimuon decays in the interval of rapidity in the center-of-mass frame 2.5 < y <inf>cms</inf> < 4.0 for pp collisions, and 2.03 < y <inf>cms</inf> < 3.53 and −4.46 < y <inf>cms</inf> < −2.96 for p–Pb collisions. The charged-particle pseudorapidity density is measured around midrapidity (|η| < 1.0). In pp collisions, the measured charged-particle multiplicity extends to about six times the average value, while in p-Pb collisions at forward (backward) rapidity a multiplicity corresponding to about three (four) times the average is reached. The ψ(2S) yield increases with the charged-particle pseudorapidity density. The ratio of ψ(2S) over J/ψ yield does not show a significant multiplicity dependence in either colliding system, suggesting a similar behavior of J/ψ and ψ(2S) yields with respect to charged-particle pseudorapidity density. Results for the ψ(2S) yield and its ratio with respect to J/ψ agree with available model calculations. [Figure not available: see fulltext.].

Item Type: Article
Uncontrolled Keywords: Jets and Jet Substructure, Properties of Hadrons
Depositing User: Symplectic Admin
Date Deposited: 13 Aug 2024 12:51
Last Modified: 16 Jun 2026 04:02
DOI: 10.1007/JHEP06(2023)147
Open Access URL: https://doi.org/10.1007/JHEP06(2023)147
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3183652
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