Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Suppression of ϒ(1S), ϒ(2S), and ϒ(3S) quarkonium states in PbPb collisions at sNN=2.76TeV

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
Read More Add to Saved list
  • Additional Information
    • Publication Date:
      2017
    • Collection:
      DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
    • Abstract:
      The production yields of ϒ(1S), ϒ(2S), and ϒ(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76 TeV. The data correspond to integrated luminosities of 166μb−1 and 5.4pb−1 for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of ϒ rapidity y up to 2.4, and transverse momentum pT up to 20GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to ≈2 and 8, for the ϒ(1S) and ϒ(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or pT. The ϒ(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of ≈7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma. ; info:eu-repo/semantics/published
    • File Description:
      2 full-text file(s): application/pdf | application/pdf
    • Relation:
      uri/info:doi/10.1016/j.physletb.2017.04.031; uri/info:scp/85019204051; https://dipot.ulb.ac.be/dspace/bitstream/2013/254433/4/doi_238060.pdf; https://dipot.ulb.ac.be/dspace/bitstream/2013/254433/3/1-s2.0-S0370269317303052-main.pdf; http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/254433
    • Online Access:
      http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/254433
      https://dipot.ulb.ac.be/dspace/bitstream/2013/254433/4/doi_238060.pdf
      https://dipot.ulb.ac.be/dspace/bitstream/2013/254433/3/1-s2.0-S0370269317303052-main.pdf
    • Accession Number:
      edsbas.24CE19B3