Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 51: Flavour Physics III
T 51.10: Talk
Wednesday, March 18, 2026, 18:30–18:45, KH 01.011
Study of Quantum Disentanglement in the B0B0 System at Belle II — •Abhijith Rajagopalan, Maximilian Kei Hattenbach, Sagar Hazra, and Hans-Günther Moser — Max-Planck-Institute for Physics, Munich, Germany
Quantum entanglement has been extensively tested in systems of photons and atoms. Its investigation in the context of heavy, unstable particles such as B mesons remains an active and compelling area of research. Quantum entanglement is a crucial assumption for time dependent CP violation studies at Belle II. However, a fraction of these B0B0 pairs that are disentangled would introduce systematic uncertainties in these studies, which are currently not accounted for. We present simulation-based studies of quantum entanglement in the B0B0 system using the hadronic B0 → D(*)− π+ and D− π+ decay channels. We test the model of partial spontaneous disentanglement, in which a fraction of the B0B0 pairs lose their entanglement and subsequently evolve independently.
Keywords: Belle II; Entanglement; B Meson; Disentanglement