Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 104: Suche nach neuen Teilchen 5

T 104.4: Vortrag

Donnerstag, 30. März 2017, 17:30–17:45, JUR 2

Search for a new heavy resonance in the decay channel V^′→ VH→ lν/ll/νν+bb with the ATLAS experiment — •Ruth Jacobs, Alessandra Betti, Götz Gaycken, Vadim Kostyukhin, Tatjana Lenz, Alexander Melzer, Elisabeth Schopf, Eckhard von Törne, and Norbert Wermes — Physikalisches Institut, Universität Bonn

One of the aims of the LHC Run-2 is the search for BSM physics. Many BSM models predict heavy resonances with masses in the TeV range. Some of these resonances are predicted to decay into a SM Higgs boson and a massive electroweak boson V=W,Z. A search for new heavy resonances in the decay mode V^′→ VH→ lν/ll/νν+bb using data collected with the ATLAS detector in 13 TeV pp-collisions is presented. The resonance search is performed by studying the invariant mass distribution of the reconstructed VH system and testing for a localized excess. The talk will focus on the decay channel Z^′→ ZH→νν+bb ("0-lepton channel"), presenting studies on the SM background suppression and the optimization of the statistical model used to obtain upper limits on the resonance cross section. In addition, the statistical combination of the search results in the individual lepton channels into a combined V′ cross section limit is discussed.