Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 28: Higgs-Zerfälle in Fermionen I
T 28.4: Vortrag
Dienstag, 26. März 2019, 16:50–17:05, H04
Search for Higgs-boson pair production in the bbτlepτlep decay channel with the ATLAS detector — •Benjamin Rottler, Kathrin Becker, Benoit Roland, and Markus Schumacher — Albert-Ludwigs-Universität Freiburg
The determination of the triple Higgs-boson self-coupling λ is one of the key goals of the physics program at current and future colliders. It will allow to reconstruct the Higgs potential. The self-coupling can be measured via non-resonant Higgs-boson pair production, which can happen at the LHC via the destructively interfering top-loop and Higgs self-interaction diagrams. Furthermore, this process is sensitive to new heavy particles.
The goal of this analysis is to measure the cross-section of the non-resonant Higgs-boson pair production using the full Run-2 dataset corresponding to an integrated luminosity of ∼140 fb−1 at √s = 13 TeV. This is done via the HH→ bbττ process, which combines the high branching ratio of the H→ bb decay and the good trigger efficiency of the H→ττ decay. Our focus is the study of the HH→ bb(ττ→ 2ℓ 4ν) decay channel, which has not been investigated so far. We expect this decay channel to give a sizeable contribution to the sensitivity of the measurement due to the highly efficient lepton triggers and the different topologies of the signal and background processes. Our plan is to incorporate modern machine learning technologies like deep neural networks (DNNs) in the analysis.