Evidence of pair production of longitudinally polarised vector bosons and study of CP properties in <i>ZZ</i> → 4<i>l</i> events with the ATLAS detector at √s=13 TeV


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Aad G., Abbott B., Abeling K., Abicht N. J., Abidi S. H., Aboulhorma A., ...Daha Fazla

JOURNAL OF HIGH ENERGY PHYSICS, cilt.2023, sa.12, 2023 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2023 Sayı: 12
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1007/jhep12(2023)107
  • Dergi Adı: JOURNAL OF HIGH ENERGY PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, INSPEC, zbMATH, Directory of Open Access Journals
  • Ankara Üniversitesi Adresli: Evet

Özet

A study of the polarisation and CP properties in ZZ production is presented. The used data set corresponds to an integrated luminosity of 140 fb(-1) of proton-proton collisions at a centre-of-mass energy of 13TeV recorded by the ATLAS detector at the Large Hadron Collider. The ZZ candidate events are reconstructed using two same-flavour opposite-charge electron or muon pairs. The production of two longitudinally polarised Z bosons is measured with a significance of 4.3 standard deviations, and its cross-section is measured in a fiducial phase space to be 2.45 +/- 0.60 fb, consistent with the next-to-leadingorder Standard Model prediction. The inclusive differential cross-section as a function of a CP-sensitive angular observable is also measured. The results are used to constrain anomalous CP-odd neutral triple gauge couplings.