Measurement of ψ (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
| Autor: | Acharya, S., Erhardt, Filip, Gotovac, Sven, Jercic, Marko, Karatovic, David, Loncar, Petra, Mudnic, Eugen, Planinic, Mirko, Poljak, Nikola, Vickovic, Linda, Zurlo, N. |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
Jets and Jet Substructure
Properties of Hadrons psi(3685): production charged particle: rapidity rapidity: density p p: scattering p nucleus: scattering charged particle: multiplicity: measured charmonium: production multiplicity: dependence dimuon: decay ALICE CERN LHC Coll experimental results 8160: 13000 GeV-cms/nucleon |
| DOI: | 10.1007/jhep06(2023)147 |
| Popis: | 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 < ycms < 4.0 for pp collisions, and 2.03 < ycms < 3.53 and −4.46 < ycms < −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. |
| Databáze: | OpenAIRE |
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