Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 51: Top Physics III (Cross Sections, Entanglement)

T 51.6: Vortrag

Mittwoch, 2. April 2025, 17:30–17:45, VG 1.103

Quantum Entanglement in Top Quark Pairs in the Lepton + Jets Channel Using Boosted Topologies — •Jannis Vornholt and Andrea Knue — TU Dortmund

Quantum entanglement, a fundamental prediction of quantum mechanics, had been experimentally observed with electrons and photons, earning recognition through the 2022 Nobel Prize in Physics. At the LHC, this phenomenon had been observed in top quark pairs at production threshold in 2023, providing a high-energy test of quantum mechanics. A test of quantum entanglement of top quark pairs is also possible at high m_tt at the LHC and is the topic of this talk. The lepton + jets channel is considered, whereby the hadronically decaying top quark is reconstructed as a large radius jet.
The angle between the decay products of the top quarks can be used as indicator for quantum entanglement. First reconstructed properties are discussed.
The presented studies are performed with ATLAS Monte Carlo simulations under Run 2 conditions.

Keywords: Quantum Entanglement; Top Quarks