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arxiv 2302.14266 v1 pith:3DFU6TVS submitted 2023-02-28 hep-ex

Precise measurements of D meson lifetimes

classification hep-ex
keywords measurementsprecisestatsystasymmetric-energybellecollectedcollider
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report the result of $D^0$ and $D^+$ lifetime measurement using $D^0\to K^-\pi^+$ and $D^+\to K^-\pi^+\pi^+$ decays reconstructed using $72~{\rm fb^{-1}}$ of data collected by the Belle II experiment at SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider. The results, $\tau(D^0)=410.5\pm1.1({\rm stat})\pm0.8({\rm syst})~{\rm fs}$ and $\tau(D^+)=1030.4\pm4.7({\rm stat})\pm 3.1({\rm syst})~{\rm fs}$, are the most precise to date and are consistent with previous measurements.

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