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Evidence for electroweak production of four charged leptons and two jets in proton-proton collisions at $\sqrt {s}$ = 13 TeV

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  • Additional Information
    • Contributors:
      Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU); Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Laboratoire Leprince-Ringuet (LLR); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS); Institut Pluridisciplinaire Hubert Curien (IPHC); Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA)); Institut de Physique Nucléaire de Lyon (IPNL); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Laboratoire d'Annecy de Physique des Particules (LAPP); Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS); CMS
    • Publication Information:
      HAL CCSD
    • Publication Date:
      2021
    • Abstract:
      International audience ; Evidence is presented for the electroweak (EW) production of two jets (jj) in association with two Z bosons and constraints on anomalous quartic gauge couplings are set. The analysis is based on a data sample of proton-proton collisions at s=13TeV collected with the CMS detector in 2016–2018, and corresponding to an integrated luminosity of 137 fb−1 . The search is performed in the fully leptonic final state ZZ→ℓℓℓ′ℓ′ , where ℓ,ℓ′=e,μ . The EW production of two jets in association with two Z bosons is measured with an observed (expected) significance of 4.0 (3.5) standard deviations. The cross sections for the EW production are measured in three fiducial volumes and the result is σEW(pp→ZZjj→ℓℓℓ′ℓ′jj)=0.33−0.10+0.11(stat)−0.03+0.04(syst)fb in the most inclusive volume, in agreement with the standard model prediction of 0.275±0.021fb . Measurements of total cross sections for jj production in association with two Z bosons are also reported. Limits on anomalous quartic gauge couplings are derived in terms of the effective field theory operators T0, T1, T2, T8, and T9.
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/2008.07013; hal-02934053; https://hal.science/hal-02934053; https://hal.science/hal-02934053/document; https://hal.science/hal-02934053/file/hal-02934053.pdf; ARXIV: 2008.07013; INSPIRE: 1811911
    • Accession Number:
      10.1016/j.physletb.2020.135992
    • Online Access:
      https://doi.org/10.1016/j.physletb.2020.135992
      https://hal.science/hal-02934053
      https://hal.science/hal-02934053/document
      https://hal.science/hal-02934053/file/hal-02934053.pdf
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • Accession Number:
      edsbas.362AF7DB