Evidence for the production of three massive vector bosons with the ATLAS detector

• Autor(a) principal: Veloso, F.
• Data de Publicação: 2019
• Outros Autores: Wolters, H., ATLAS Collaboration
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10316/107231; https://doi.org/10.1016/j.physletb.2019.134913

A search for the production of three massive vector bosons in proton–proton collisions is performed using data at √s=13TeV recorded with the ATLAS detector at the Large Hadron Collider in the years 2015–2017, corresponding to an integrated luminosity of 79.8fb−1. Events with two same-sign leptons (electrons or muons) and at least two reconstructed jets are selected to search for WWW→ ν νqq. Events with three leptons without any same-flavour opposite-sign lepton pairs are used to search for WWW→ ν ν ν, while events with three leptons and at least one same-flavour opposite-sign lepton pair and one or more reconstructed jets are used to search for WWZ→ νqq . Finally, events with four leptons are analysed to search for WWZ→ ν ν and WZZ→qq . Evidence for the joint production of three massive vector bosons is observed with a significance of 4.1 standard deviations, where the expectation is 3.1 standard deviations.