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Centrality and transverse momentum dependence of inclusive J/ψ\psiψ production at midrapidity in Pb-Pb collisions at sNN\sqrt{s_{\rm NN}}sNN = 5.02 TeVстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 августа 2020 г.
- Авторы: Malinina L., ALICE C.
- Журнал: Physics Letters B
- Том: 805
- Год издания: 2020
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 135434
- DOI: 10.1016/j.physletb.2020.135225
- Аннотация: 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 〈pT2〉PbPb/〈pT2〉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.
- Добавил в систему: Малинина Людмила Владимировна