Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 14: Elektroschwache Wechselwirkung

T 14.1: Group Report

Monday, March 25, 2019, 16:00–16:20, S14

Evidence for electroweak triboson production with the ATLAS detector at LHC — Carlo A. Gottardo, Sebastian Heer, Vadim Kostyukhin, Ö. Oğul Öncel, Keshava Prasad, Andrea Sciandra, and •Markus Cristinziani — Physikalisches Institut, Universität Bonn

A search for the production of three massive vector bosons is performed using proton–proton collision data recorded with the ATLAS detector at the Large Hadron Collider at √s = 13 TeV in the years 2015–2017, corresponding to an integrated luminosity of 79.8 fb⁻¹. Events with two, three or four reconstructed leptons (electrons or muons) are selected. Boosted decision tree classifiers are employed to distinguish the triboson signal from the background. An expected sensitivity of 3.1 standard deviations for the combination of the WWW, WWZ and WZZ channels is attained.