Centrality and transverse momentum dependence of inclusive J/psi production at midrapidity in Pb–Pb collisions at sNN = 5.02 TeV

The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of √sNN = 5.02 TeV at midrapidity (|y| < 0.9) is reported by the ALICE Collaboration. The measurements are performed in the dielectron decay channel, as a function of event centrality and J/ψ transverse momentum pT, down to pT = 0. The J/ψ mean transverse momentum pT and rAA ratio, defined as p2 T PbPb/p2 T pp, are evaluated. Both observables show a centrality dependence decreasing towards central (head-on) collisions. The J/ψ nuclear modification factor RAA exhibits a strong pT dependence with a large suppression at high pT and an increase to unity for decreasing pT. When integrating over the measured momentum range pT < 10 GeV/c, the J/ψ RAA shows a weak centrality dependence. Each measurement is compared with results at lower center-of-mass energies and with ALICE measurements at forward rapidity, as well as to theory calculations. All reported features of the J/ψ production at low pT are consistent with a dominant contribution to the J/ψ yield originating from charm quark (re)combination.

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Eser Adı
(dc.title)
Centrality and transverse momentum dependence of inclusive J/psi production at midrapidity in Pb–Pb collisions at sNN = 5.02 TeV
Yayın Türü
(dc.type)
Diğer
Yazar/lar
(dc.contributor.author)
KARASU UYSAL, Ayben
Yazar/lar
(dc.contributor.author)
ALICE Collaboration
Atıf Dizini
(dc.source.database)
Wos
Atıf Dizini
(dc.source.database)
Scopus
Yayın Tarihi
(dc.date.issued)
2020
Kayıt Giriş Tarihi
(dc.date.accessioned)
2022-03-04T06:55:30Z
Açık Erişim tarihi
(dc.date.available)
2022-03-04T06:55:30Z
Özet
(dc.description.abstract)
The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of √sNN = 5.02 TeV at midrapidity (|y| < 0.9) is reported by the ALICE Collaboration. The measurements are performed in the dielectron decay channel, as a function of event centrality and J/ψ transverse momentum pT, down to pT = 0. The J/ψ mean transverse momentum pT and rAA ratio, defined as p2 T PbPb/p2 T pp, are evaluated. Both observables show a centrality dependence decreasing towards central (head-on) collisions. The J/ψ nuclear modification factor RAA exhibits a strong pT dependence with a large suppression at high pT and an increase to unity for decreasing pT. When integrating over the measured momentum range pT < 10 GeV/c, the J/ψ RAA shows a weak centrality dependence. Each measurement is compared with results at lower center-of-mass energies and with ALICE measurements at forward rapidity, as well as to theory calculations. All reported features of the J/ψ production at low pT are consistent with a dominant contribution to the J/ψ yield originating from charm quark (re)combination.
Tek Biçim Adres
(dc.identifier.uri)
http://hdl.handle.net/20.500.12498/5334
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