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Precision measurement of the Z boson invisible width in pp collisions at $\sqrt{s}$ = 13 TeV

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  • Additional Information
    • Publication Information:
      North-Holland Publ.
    • Publication Date:
      2023
    • Collection:
      DESY Publication Database (PUBDB)
    • Subject Terms:
      DE
    • Abstract:
      A precise measurement of the invisible width of the Z boson produced in proton-proton collisions at a center-of-mass energy of 13 TeV is presented using data recorded by the CMS experiment at the LHC, corresponding to an integrated luminosity of 36.3 fb$^{-1}$. The result is obtained from a simultaneous fit to kinematic distributions for two data samples of Z boson plus jets: one dominated by Z boson decays to invisible particles and the other by Z boson decays to muon and electron pairs. The invisible width is measured to be 523 $\pm$ 3 (stat) $\pm$ 16 (syst) MeV. This result is the first precise measurement of the invisible width of the Z boson at a hadron collider, and is the single most precise direct measurement to date, competitive with the combined result of the direct measurements from the LEP experiments.
    • Relation:
      info:eu-repo/semantics/altIdentifier/issn/0370-2693; info:eu-repo/semantics/altIdentifier/arxiv/arXiv:2206.07110; info:eu-repo/semantics/altIdentifier/issn/0031-9163; info:eu-repo/semantics/altIdentifier/issn/1873-2445; https://bib-pubdb1.desy.de/record/585912; https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2023-03673%22
    • Online Access:
      https://doi.org/10.1016/j.physletb.2022.137563
      https://doi.org/10.3204/PUBDB-2023-03673
      https://bib-pubdb1.desy.de/record/585912
      https://bib-pubdb1.desy.de/search?p=id:%22PUBDB-2023-03673%22
    • Rights:
      info:eu-repo/semantics/openAccess
    • Accession Number:
      edsbas.9E5F725D