Measurement of nuclear modification factors of ϒ(1S), ϒ(2S), and ϒ(3S) mesons in PbPb collisions at sNN=5.02 TeV

The CMS Collaboration, cms-publication-committee-chair@cern.ch

研究成果: Article査読

66 被引用数 (Scopus)

抄録

The cross sections for ϒ(1S), ϒ(2S), and ϒ(3S) production in lead–lead (PbPb) and proton–proton (pp) collisions at sNN=5.02 TeV have been measured using the CMS detector at the LHC. The nuclear modification factors, RAA, derived from the PbPb-to-pp ratio of yields for each state, are studied as functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of all three states are found to be significantly suppressed, and compatible with a sequential ordering of the suppression, RAA(ϒ(1S))>RAA(ϒ(2S))>RAA(ϒ(3S)). The suppression of ϒ(1S) is larger than that seen at sNN=2.76TeV, although the two are compatible within uncertainties. The upper limit on the RAA of ϒ(3S) integrated over pT, rapidity and centrality is 0.096 at 95% confidence level, which is the strongest suppression observed for a quarkonium state in heavy ion collisions to date.

本文言語English
ページ(範囲)270-293
ページ数24
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
790
DOI
出版ステータスPublished - 2019 3月 10

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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