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@ARTICLE{Hayrapetyan:646489,
      author       = {Hayrapetyan, Aram and others},
      collaboration = {{CMS Collaboration}},
      title        = {{O}bservation of $Υ$(1{S}) + {Z} associated production and
                      measurement of the effective double-parton scattering cross
                      section in proton-proton collisions at $\sqrt{s}$ = 13
                      {T}e{V}},
      reportid     = {PUBDB-2026-00876, arXiv:2602.02770. CMS-BPH-23-007.
                      CERN-EP-2025-163},
      year         = {2026},
      note         = {Submitted to Physical Review Letters. All figures and
                      tables can be found at
                      http://cms-results.web.cern.ch/cms-results/public-results/publications/BPH-23-007
                      (CMS Public Pages)},
      abstract     = {The observation of associated production of an $Υ$(1S)
                      meson with a Z boson and a measurement of the ratio of its
                      fiducial cross section to the fiducial cross section of the
                      Z boson are presented. Both the $Υ$(1S) meson and the Z
                      boson are identified via decays into a pair of opposite-sign
                      muons. The analysis is based on proton-proton (pp) collision
                      data at $\sqrt{s}$ = 13 TeV, collected with the CMS detector
                      in 2016$-$2018 and corresponding to an integrated luminosity
                      of 138 fb$^{-1}$. Using the production of the Z boson
                      decaying into four muons as a normalization channel, the
                      ratio of the fiducial cross sections $σ$(pp $\to$ Z
                      $+$$Υ$(1S))$\mathcal{B}$(Z
                      $\to$$μ^+μ^-$)$\mathcal{B}$($Υ$(1S) $\to$$μ^+μ^-$ ) to
                      $σ$(pp $\to$ Z)$\mathcal{B}$(Z $\to$ 4$μ$) is measured to
                      be $\mathcal{R}_{\mathrm{Z+Υ}\mathrm{(1S)}}$ = (21.1 $\pm$
                      55 (stat) $\pm$ 0.6 (syst) $\times$ 10$^{-3}$), where stat
                      and syst denote the statistical and systematic
                      uncertainties, respectively. The result is used to extract
                      the effective double-parton scattering cross section
                      $σ_\text{eff}$ = 13.0$^{+7.7}_{-3.4}$. In addition, for the
                      first time, $σ_\text{eff}$ is measured in bins of the
                      transverse momentum of the $Υ$(1S) meson or of the Z
                      boson.},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611) /
                      HIDSS-0002 - DASHH: Data Science in Hamburg - Helmholtz
                      Graduate School for the Structure of Matter
                      $(2019_IVF-HIDSS-0002)$ / DFG project G:(GEPRIS)390833306 -
                      EXC 2121: Das Quantisierte Universum II (390833306)},
      pid          = {G:(DE-HGF)POF4-611 / $G:(DE-HGF)2019_IVF-HIDSS-0002$ /
                      G:(GEPRIS)390833306},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2602.02770},
      howpublished = {arXiv:2602.02770},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2602.02770;\%\%$},
      url          = {https://bib-pubdb1.desy.de/record/646489},
}