A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV (2020)
ALICE collaboration. (2020). Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb–Pb collisions at √sNN = 5.02 TeV. Physics Letters B, 805, Article 135434. https://doi.org/10.1016/j.physletb.2020.135434
JYU-tekijät tai -toimittajat
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Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: ALICE collaboration
Lehti tai sarja: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Julkaisuvuosi: 2020
Volyymi: 805
Artikkelinumero: 135434
Kustantaja: Elsevier
Julkaisumaa: Alankomaat
Julkaisun kieli: englanti
DOI: https://doi.org/10.1016/j.physletb.2020.135434
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Kokonaan avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/71294
Julkaisu on rinnakkaistallennettu: https://arxiv.org/abs/1910.14404
Tiivistelmä
The inclusive J/ψ meson production in Pb–Pb collisions at a center-of-mass energy per nucleon–nucleon collision of √sNN=5.02TeV 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 p2TPbPb/p2Tpp, 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 p Tand an increase to unity for decreasing pT. When integrating over the measured momentum range pT<10GeV/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.
YSO-asiasanat: hiukkasfysiikka
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2020
JUFO-taso: 2
