Abstract: The transverse momentum (p<inf>T</inf>) dependence of the nuclear modification factor R<inf>AA</inf> and the centrality dependence of the average transverse momentum ãp<inf>T</inf>ã for inclusive J/Ï have been measured with ALICE for Pb-Pb collisions at âs<inf>NN</inf> TeV in the e+e<sup>â</sup> decay channel at mid-rapidity (|y| < 0.8). The ãp<inf>T</inf>ã is significantly smaller than the one observed for pp collisions at the same centre-of-mass energy. Consistently, an increase of R<inf>AA</inf> is observed towards low p<inf>T</inf>. These observations might be indicative of a sizable contribution of charm quark coalescence to the J/Ï production. Additionally, the fraction of non-prompt J/Ï from beauty hadron decays, f<inf>B</inf>, has been determined in the region 1.5 < p<inf>T</inf>< 10 GeV/c in three centrality intervals. No significant centrality dependence of f<inf>B</inf> is observed. Finally, the R<inf>AA</inf> of non-prompt J/Ï is discussed and compared with model predictions. The nuclear modification in the region 4.5 < p<inf>T</inf>< 10 GeV/c is found to be stronger than predicted by most models.
|Titolo:||Inclusive, prompt and non-prompt J/Psi production at mid-rapidity in Pb-Pb collisions at sqrt(sNN)=2.76 TeV|
|Data di pubblicazione:||2015|
|Appare nelle tipologie:||1.1.1 Articolo su rivista con DOI|