Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 73: Flavour Physics IV
T 73.1: Vortrag
Donnerstag, 3. April 2025, 16:15–16:30, VG 1.103
Quantum Entanglement of neutral B-mesons at the Y(5s) decay — •Adrian Liese — Max-Planck-Institut, Garching
We investigate the decay channel Υ(5s)→ B0B0* and its subsequent decay into B0B0. This B-meson pair is supposed to be produced in an JPC=1−+ entangled state which is different from a neutral B-meson pair coming from the Υ(4s) where JPC=1–. The different C-symmetry changes the entanglement and subsequently the probability density. The Belle I data for the Υ(5s) offers the unique ability to measure t=t1+t2 and Δ t=t2−t1 individually, which is not possible for Belle II data of the Υ(4s). The new probabilities were calculated as functions of t and Δ t and compared to the C=-1 entanglement as well as the disentangled system.
Keywords: Entanglement; B-Mesons; Belle II