Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 4: Quark mixing and CP violation
T 4.3: Vortrag
Montag, 15. März 2021, 16:30–16:45, Td
Measurement of CP violation in B0→ ψ KS0 decays with the LHCb detector using the full Run II data — Vukan Jevtic, Patrick Mackowiak, and •Gerwin Meier — Experimentelle Physik 5, TU Dortmund
The measurement of the CKM angle β is an important precision test of the Standard Model. The golden mode of this observable is B0 → J/ψ KS0, because of its domination by tree-level amplitudes. With new reconstruction types of the KS0 and the combination of different decay channels it is possible to increase the statistical sensitivity to the most precise measurement of this quantity.
In this talk the current status of the CP violation measurement in the decays B0 → J/ψ(→ ℓ±ℓ∓)KS0(→ π±π∓) with ℓ=e,µ and B0 → ψ(2S)(→ µ±µ∓)KS0(→ π±π∓) will be presented for the full LHCb Run II dataset, which corresponds to 6 fb−1.