Nuclear modification of Y states in pPb collisions at sNN=5.02TeV

Tumasyan A., Adam W., Ambrogi F., Bergauer T., Dragicevic M., Erö J., ...More

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol.835, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 835
  • Publication Date: 2022
  • Doi Number: 10.1016/j.physletb.2022.137397
  • Journal Name: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, INSPEC, zbMATH, Directory of Open Access Journals
  • Keywords: CMS, Bottomonium, Quarkonium suppression, Quark-gluon plasma, Heavy ion collisions, QUARK-GLUON PLASMA, SUPPRESSION
  • Middle East Technical University Affiliated: Yes


© 2022 The Author(s)Production cross sections of [Formula presented], [Formula presented], and [Formula presented] states decaying into [Formula presented] 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 [Formula presented] is found to be [Formula presented]. Similar results for the excited states indicate a sequential suppression pattern, such that [Formula presented]. The suppression of all states is much less pronounced in pPb than in PbPb collisions, and independent of transverse momentum [Formula presented] and center-of-mass rapidity [Formula presented] of the individual [Formula presented] state in the studied range [Formula presented] and [Formula presented]. 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.