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Inclusive quarkonium production in pp collisions at $$\sqrt{s}$$ = 5.02 TeV

Acharya, S.
•
Adamová, D.
•
Adler, A.
altro
Zurlo, N.
2023
  • journal article

Periodico
EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
This article reports on the inclusive production cross section of several quarkonium states, J/psi, psi(2S), Upsilon(1S), Upsilon(2S), and Upsilon(3S), measured with the ALICE detector at the LHC, in pp collisions at root s = 5.02 TeV. The analysis is performed in the dimuon decay channel at forward rapidity (2.5 < y < 4). The integrated cross sections and transverse-momentum (p(T)) and rapidity (y) differential cross sections for J/psi, psi(2S), Upsilon(1S), and the psi(2S)-to-J/psi cross section ratios are presented. The integrated cross sections, assuming unpolarized quarkonia, are: sigma(J/psi) (p(T) < 20 GeV/c) = 5.88 +/- 0.03 +/- 0.34 mu b, sigma(psi(2S)) (p(T) < 12 GeV/c) = 0.87 +/- 0.06 +/- 0.10 mu b, sigma(Upsilon(1S)) (p(T) < 15 GeV/c) = 45.5 +/- 3.9 +/- 3.5 nb, sigma(Upsilon(2S)) (p(T) < 15 GeV/c) = 22.4 +/- 3.2 +/- 2.7 nb, and sigma(Upsilon(3S)) (p(T) < 15 GeV/c) = 4.9 +/- 2.2 +/- 1.0 nb, where the first (second) uncertainty is the statistical (systematic) one. For the first time, the cross sections of the three Upsilon states, as well as the psi(2S) one as a function of p(T) and y, are measured at root s = 5.02 TeV at forward rapidity. These measurements also significantly extend the J/psi p(T) reach and supersede previously published results. A comparison with ALICE measurements in pp collisions at root s = 2.76, 7, 8, and 13 TeV is presented and the energy dependence of quarkonium production cross sections is discussed. Finally, the results are compared with the predictions from several production models.
DOI
10.1140/epjc/s10052-022-10896-8
WOS
WOS:000927941200003
Archivio
https://hdl.handle.net/11368/3067878
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85146764717
https://link.springer.com/article/10.1140/epjc/s10052-022-10896-8
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/3067878/1/EPJC_83(2023)61_1-27.pdf
Soggetti
  • Quarkonium

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