Charmonium production in pp, pPb and PbPb with CMS

16th International Conference on Strangeness in Quark Matter

Lee, Songkyo^1

Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, Korea, Republic of^1

关键词: Charmonium;    Nuclear modification factors;    Pb-Pb collisions;    Photoproductions;    Production yield;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012038/pdf
DOI  :  10.1088/1742-6596/779/1/012038

来源: IOP

【 摘 要 】

We report on the analysis of charmonia in pp, pPb and PbPb collisions with the CMS experiment with various observables. The cross section for coherent J/ψ photoproduction is measured in ultra-peripheral PbPb collisions at 2.76 TeV. The ratio of prompt J/ψ yields at forward (proton-going direction) and backward (Pb-going direction) is studied as a function of pT, rapidity, and the event activity in pPb collisions at 5.02 TeV. The nuclear modification factor of prompt J/ψ in PbPb collisions at 2.76 TeV is presented as a function of centrality, pT, and rapidity. Finally, the production yields of ψ(2S) and J/ψ in pp and PbPb collisions have been compared.