Abstract

Production cross sections of ▪, ▪, and ▪ states decaying into ▪ in proton-lead (pPb) collisions are reported using data collected by the CMS experiment at sNN=5.02TeV. A comparison is made with corresponding cross sections obtained with pp data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for ▪ is found to be ▪. Similar results for the excited states indicate a sequential suppression pattern, such that ▪. The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum ▪ and center-of-mass rapidity ▪ of the individual ▪ state in the studied range ▪ and ▪. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume initial-state modifications.

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