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

The CMS Collaboration

Research output: Contribution to journalArticlepeer-review

## Abstract

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.

Original language English (US) 137397 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 835 https://doi.org/10.1016/j.physletb.2022.137397 Published - Dec 10 2022

## Keywords

• Bottomonium
• CMS
• Heavy ion collisions
• Quark-gluon plasma
• Quarkonium suppression

## ASJC Scopus subject areas

• Nuclear and High Energy Physics

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