Measurement of the cross-sections of the electroweak and total production of a Z? pair in association with two jets in pp collisions at s=13 TeV with the ATLAS detector
Küçük Resim Yok
Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This Letter presents the measurement of the fiducial and differential cross-sections of the electroweak production of a Z? pair in association with two jets. The analysis uses 140 fb?1 of LHC proton–proton collision data taken at s=13 TeV recorded by the ATLAS detector during the years 2015–2018. Events with a Z boson candidate decaying into either an e+e? or ?+?? pair, a photon and two jets are selected. The electroweak component is extracted by requiring a large dijet invariant mass and by using the information about the centrality of the system and is measured with an observed and expected significance well above five standard deviations. The fiducial pp?Z?jj cross-section for the electroweak production is measured to be 3.6 ± 0.5 fb. The total fiducial cross-section that also includes contributions where the jets arise from strong interactions is measured to be 16.8?1.8 +2.0 fb. The results are consistent with the Standard Model predictions. Differential cross-sections are also measured using the same events and are compared with parton-shower Monte Carlo simulations. Good agreement is observed between data and predictions. © 2023 The Author(s)
Açıklama
Anahtar Kelimeler
Kaynak
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
846
