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

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dc.citation.firstpage270
dc.citation.journalTitlePhysics Letters B
dc.citation.lastpage293
dc.citation.volumeNumber790
dc.contributor.authorThe CMS Collaboration
dc.date.accessioned2021-10-07T18:33:00Z
dc.date.available2021-10-07T18:33:00Z
dc.date.issued2019
dc.description.abstractThe 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.
dc.identifier.citationThe CMS Collaboration. "Measurement of nuclear modification factors of ϒ(1S), ϒ(2S), and ϒ(3S) mesons in PbPb collisions at sNN=5.02 TeV." <i>Physics Letters B,</i> 790, (2019) Elsevier: 270-293. https://doi.org/10.1016/j.physletb.2019.01.006.
dc.identifier.digital1-s2-0-S037026931930022X-main
dc.identifier.doihttps://doi.org/10.1016/j.physletb.2019.01.006
dc.identifier.urihttps://hdl.handle.net/1911/111511
dc.language.isoeng
dc.publisherElsevier
dc.rightsThis is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/).
dc.titleMeasurement of nuclear modification factors of ϒ(1S), ϒ(2S), and ϒ(3S) mesons in PbPb collisions at sNN=5.02 TeV
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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