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Evidence for the production of three massive vector bosons with the ATLAS detector
Aix Marseille Univ, IN2P3, CNRS, CPPM, Marseille, France..
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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Number of Authors: 29162019 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 798, article id UNSP 134913Article in journal (Refereed) Published
Abstract [en]

A search for the production of three massive vector bosons in proton-proton collisions is performed using data at root s = 13 TeV recorded with the ATLAS detector at the Large Hadron Collider in the years 2015-2017, corresponding to an integrated luminosity of 79.8 fb(-1). Events with two same-sign leptons l (electrons or muons) and at least two reconstructed jets are selected to search for WWW -> l nu l nu qq. Events with three leptons without any same-flavour opposite-sign lepton pairs are used to search for WWW > l nu l nu l nu, 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 -> l nu qqll. Finally, events with four leptons are analysed to search for WWZ > l nu l nu ll and WZZ > qqllll. 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.

Place, publisher, year, edition, pages
ELSEVIER , 2019. Vol. 798, article id UNSP 134913
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Subatomic Physics
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URN: urn:nbn:se:kth:diva-264839DOI: 10.1016/j.physletb.2019.134913ISI: 000494939000011Scopus ID: 2-s2.0-85072568508OAI: oai:DiVA.org:kth-264839DiVA, id: diva2:1375129
Note

QC 20191204

Available from: 2019-12-04 Created: 2019-12-04 Last updated: 2019-12-04Bibliographically approved

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Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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