Measurement of $\psi$(2S) production as a function of charged-particle pseudorapidity density in pp collisions at $\sqrt{s}$ = 13 TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 8.16 TeV with ALICE at the LHC - INSPIRE

DataBETA

Measurement of $\psi$ (2S) production as a function of charged-particle pseudorapidity density in pp collisions at $\sqrt{s}$ = 13 TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 8.16 TeV with ALICE at the LHC

ALICE

Collaboration

Apr 21, 2022

25 pages

Published in:

JHEP 06 (2023) 147

Published: Jun 23, 2023

e-Print:

2204.10253 [nucl-ex]

DOI:

10.1007/JHEP06(2023)147

Report number:

CERN-EP-2022-064

Experiments:

CERN-LHC-ALICE,
CERN-LHC-ALICE

View in:

reference search22 citations

Citations per year

Abstract: (Springer)

Production of inclusive charmonia in pp collisions at center-of-mass energy of

\sqrt{s}

= 13 TeV and p–Pb collisions at center-of-mass energy per nucleon pair of

\sqrt{s_{\textrm{NN}}}

= 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

_{cms}

< 4.0 for pp collisions, and 2.03 < y

_{cms}

< 3.53 and −4.46 < y

_{cms}

< −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.[graphic not available: see fulltext]

Note:

25 pages, 6 captioned figures, 2 tables, authors from page 20, published version, figures at http://alice-publications.web.cern.ch/node/7849

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

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