Evidence for the production of three massive vectorbosons in $pp$ collisions with the ATLAS detector

on behalf of the ATLAS Collaboration, , Sciandra, A. and Britton, D. (2019) Evidence for the production of three massive vectorbosons in $pp$ collisions with the ATLAS detector. In: XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Working Group 4: Hadronic and Electroweak Oberservables, Torino, Italy, 8-12 April 2019, p. 135. (doi: 10.22323/1.352.0135)

Abstract

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 ℓ (electrons or muons) and at least two reconstructed jets are selected to search for WWW→ℓνℓνqq. Events with three leptons without any same-flavour opposite-sign lepton pairs are used to search for WWW→ℓνℓνℓν, 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→ℓνqqℓℓ. Finally, events with four leptons are analysed to search for WWZ→ℓνℓνℓℓ and WZZ→qqℓℓℓℓ. Evidence for the joint production of three massive vector bosons is observed with a significance of 4.0 standard deviations, where the expectation is 3.1 standard deviations.

• Item Type: Conference Proceedings
• Additional Information: Authors: On behalf of the ATLAS Collaboration.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: on behalf of the ATLAS Collaboration, , Sciandra, A., and Britton, D.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Copyright Holders: Copyright © 2019 The Authors
• First Published: First published in Proceedings of Science v. 352
• Publisher Policy: Reproduced under a Creative Commons License

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